Patent Grant
9304278
This disclosure generally relates to waveguides that scatter light from the side thereof. More particularly, this disclosure relates to cables and cable assemblies, such as patch cords, that are traceable due to the addition of a side-emitting optical fiber.
Today's computer networks continue to increase in size and complexity. Businesses and individuals rely on these networks to store, transmit, and receive critical data at high speeds. Even with the expansion of wireless technology, wired connections remain critical to the operation of computer networks, including enterprise data centers. Portions of these wired computer networks are regularly subject to removal, replacement, upgrade or other moves and changes. To ensure the continued proper operation of each network, the maze of cables connecting the individual components must be precisely understood and properly connected between specific ports.
In many cases, a network's cables, often called patch cords, can be required to bridge several meters across a data center. The cables may begin in one equipment rack, run through the floor or other conduit, and terminate at a component in a second equipment rack.
As a result, there is a need for a traceable cable that provides a means for the network operator to quickly identify the path and approximate terminal end of a given cable that is being replaced, relocated, or tested.
The present disclosure includes traceable cables and side-emitting waveguides used in the same. In one embodiment of this disclosure, the cable includes at least one data transmission element, a jacket at least partially surrounding the at least one data transmission element, and a side-emitting optical fiber incorporated with and extending along at least a portion of the length of the cable. The side-emitting optical fiber has a core and a cladding substantially surrounding the core to define an exterior surface. The cladding has spaced apart scattering sites penetrating the exterior surface along the length of the optical fiber. The scattering sites scatter light so that the scattered light is emitted from the side-emitting optical fiber at discrete locations. When light is transmitted through the core, light scattered from the side-emitting optical fiber allows the cable to be traced along at least a portion of the length thereof.
The present disclosure also includes methods of forming traceable cables having at least one data transmission element and a jacket at least partially surrounding the at least one data transmission element. The method may comprise forming a side-emitting optical fiber by: adding a cladding around a glass core to create an exterior surface, the cladding having a lower index of refraction than the glass core, selectively ablating portions of the cladding to create scattering sites penetrating the exterior surface and configured to allow the side-emitting optical fiber to scatter light therefrom, and at least partially embedding the side-emitting optical fiber within the jacket so that the side-emitting optical fiber extends along at least a portion of a length of the cable.
The present disclosure also includes another method of forming a traceable cable that includes at least one data transmission element and a jacket at least partially surrounding the at least one data transmission element. The method may comprise forming an optical fiber by: passing a glass core through a first die block that applies a UV-curable cladding onto the glass core to form an optical fiber, wherein the cladding has a lower index of refraction than the glass core. The optical fiber is further formed by drawing the optical fiber past a laser, wherein the laser is pulsed as the optical fiber is drawn past the laser to selectively ablate portions of the cladding, the laser ablated portions defining scattering sites configured to allow the optical fiber to scatter light therefrom. Forming the optical fiber may further comprise passing the optical fiber through a second die block after selectively ablating portions of the cladding with the laser, wherein the second die block applies an acrylic coating over the cladding. The method may further include at least partially embedding the optical fiber within the jacket so that the optical fiber extends along at least a portion of a length of the cable.
Additional features and advantages will be set forth in the detailed description which follows, and in part will be readily apparent to those skilled in the art. It is to be understood that the foregoing general description, the following detailed description, and the accompanying drawings are merely exemplary and intended to provide an overview or framework to understand the nature and character of the claims.
The accompanying drawings are included to provide a further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate one or more embodiments, and together with the description serve to explain principles and operation of the various embodiments. Features and attributes associated with any of the embodiments shown or described may be applied to other embodiments shown, described, or appreciated based on this disclosure.
Various embodiments will be further clarified by examples in the description below. In general, the description relates to side-emitting waveguides, cables, and cable assemblies using the waveguides to facilitate the traceability of the cable or cable assembly. This description also relates to methods of forming the side-emitting waveguides, cables and cable assemblies.
A problem that occurs in data centers or similar network locations is congestion and clutter caused by large quantities of cables.
An aspect of this disclosure is the provision of side-emitting waveguides, usable within traceable cables, which provide efficient light emission that may provide visibility of the waveguide in well-lit rooms over a significant distance, wherein the waveguides may be produced by an efficient manufacturing method.
Turning back to the figures,
In some embodiments, the cable 3 may be more appropriately referred to as a conduit, without having any data transmission elements 7. Instead of transmitting a data signal, these cables 3 may transmit fluids such as air or liquid. These cables 3 may be appropriate for use in a medical setting such as IV lines or oxygen tubing. The cable 3 includes a jacket 10. The jacket 10 may be a hollow tube forming a conduit that can substantially surround the data transmission elements 7 and that can define an outer surface of the cable 3. Alternatively, the data transmission elements 7 may be at least partially embedded within the jacket 10.
Cables 3 of the present disclosure include a tracer element 15. The tracer element 15 is provided to enable the cable 3 to be selectively identified at one or more areas along the cable 3. The tracer element 15 may be visually identified with or without special equipment, such as an IR camera.
One example of a tracer element 15 is a side-emitting optical fiber 20 used to identify one or more portions of the cable 3. The side-emitting optical fiber 20 may be referred to interchangeably as a side-emitting optical waveguide herein. Therefore this disclosure does not intend to differentiate between the terms “optical fiber” and “optical waveguide” per se. The side-emitting optical fiber 20 may conduct nonvisible light. The side-emitting optical fiber 20 can also be used to conduct visible light, such as green light at approximately 532 nm. Red light, blue light, or a combination thereof could also be used to assist with tracing the cable 3. Green light may be used due to the relative high degree of sensitivity of the human eye to green light.
As seen in
Still referring to
Turning to
In some embodiments, the core 30 may be a substantially solid core, generally free of voids or air pockets as found within the airline optical fiber type of diffusive optical fibers. A core 30 that is free from voids may facilitate splicing, polishing, or other processing operations, which may be needed in some embodiments to make ends of the side-emitting optical fiber 20 compatible with a device for launching light into the side-emitting optical fiber.
The cladding 32 can be a polymer, such as fluoro-acrylate. In the embodiment illustrated in the drawings, the material for the cladding 32 is selected to have an index of refraction that differs from the index of refraction of the core 30. In some embodiments the index of refraction of the cladding 32 is lower than that of the core. In some embodiments, the indices of refraction produce a step-index optical fiber. In other embodiments, the side-emitting optical fiber 20 may be a trapezium or triangular index fiber. The cladding 32 closely surrounds the core 30 to help maintain light within the side-emitting optical fiber 20. The cladding 32 may have a thickness between about 4% and about 40% of the diameter of the core. For example, the cladding 32 may be between about 5 and about 50 microns thick from the surface of the core 30 to an exterior surface 36 of the cladding 32 when the core 30 has a diameter of 125 microns.
According to embodiments of the present description, scattering sites 40 are selectively provided at spaced apart locations on the cladding 32 along the length of the side-emitting optical fiber 20. The scattering sites 40 are configured to provide areas where light, which is otherwise traveling along the side-emitting optical fiber 20, is scattered and therefore able to be emitted from the side of the side-emitting optical fiber 20, as shown in stippled lines in
The scattering sites 40 are areas where the exterior surface 36 is modified, removed, deformed, or damaged to produce optical surfaces tending to scatter incoming light. Some or all of the scattering sites 40 may be annular or otherwise generally ring shaped, extending around the entire circumference of the side-emitting optical fiber 20. In some embodiments, as understood from
A complete ring shape may provide the most uniformly scattered light, but a full ring is not believed necessary to have light scatter in all 360 degrees around a lengthwise axis of the side-emitting optical fiber 20 and/or light to be seen 360 degrees a lengthwise axis of the cable 3. The scattering sites 40 scatter light generally in all directions with varying intensity. Therefore, each scattering site 40 directs light immediately out of an adjacent portion of the exterior surface 36, and also directs light back through the core 30 and out an opposite portion of the exterior surface 36 as schematically illustrated in
The scattering sites 40 may be produced by a variety of mechanical, optical, or chemical processes. In the embodiment of
Several characteristics of the scattering sites 40 may be refined to help ensure that the extraction of light from the core 30 and cladding 32 to provide tracer locations 4 along the cable 3 are each visible in a well-lit environment. The characteristics may also be refined based the practical manufacturability of the cable 3 and side-emitting optical fiber 20.
First, the separation P between the scattering sites 40 may be selected to address the unique challenges associated with cable assemblies for data centers or similar network locations. In one embodiment, the scattering sites 40 should be at least about 1 cm apart and less than about 1 meter apart. Scattering sites 40 that are too close together approach a uniform emission along the length of the cable 3, and may lose the efficient use of light provided by the discrete tracer locations 4. Scattering sites 40 that are too far apart may lose the benefits of along-the-length tracer locations 4 and the ability to sufficiently trace the cable 3 in its environment with other cables. Additionally, scattering sites 40 that are too far apart may result in no scattering sites 40 sufficiently close to the terminal end of the cable 3 to provide a tracer location 4 within the appropriate equipment rack 110. An approximate separation P of about 10 cm may balance the light efficiency and traceability benefits, keeping in mind that several of the tracer locations 4 may be hidden behind other cables, effectively increasing the relative spacing between each tracer location 4. In some embodiments, the separation P may facilitate identifying the overall length of the cable 3. For example, the approximate separation P may be about 1 meter in some embodiments, thereby allowing a person to count the tracer locations 4 to approximate the total length of the cable 3 in meters. In other embodiments, the approximate separation P may be about 1 foot, thereby allowing a person to count the tracer locations 4 to estimate the total length of the cable 3 in feet.
As used herein, the cable 3 and the side-emitting optical fiber 20 may be described as each having respective launched ends and traced ends. The launched ends can be the known, accessible end of the cable 3 and end of the side-emitting optical fiber 20 where the network operator would provide (i.e. launch) tracer light to the side-emitting optical fiber 20. The respective traced ends should therefore be understood as the respective ends of the cable 3 and optical fiber 20 opposite the launched ends. The traced end, particularly of the cable 3, is the end of the cable that needs to be identified by the tracing process. It should be understood that these ends are not fixed. For any given operation, either end of the cable 3 may constitute the launched end and the traced end.
The size of each scattering site 40 may also be based on the challenges associated with cable assemblies for data centers or similar network locations. The size of each scattering site 40 may include the arc sweep around the side-emitting optical fiber 20. The size of each scattering site 40 may also include the magnitude M (
Further, the scattering sites 40 may be characterized by their depth D (
In an extreme example, the scattering sites 40 may remove the cladding 32 completely down to the core 30. In one example, the scattering sites 40 do not completely remove the cladding 32 at the given location. Depths D may include between about 1% to about 100% of the thickness of the cladding 32. Yet again, the depth D of each scattering site 40 may be substantially consistent along the length of the cable 3. Alternatively, the depth D may vary as a function of the distance from an end of the cable 3 or side-emitting optical fiber 20. For example the depth D may increase with distance from the launched end. The depth D is generally defined as a maximum distance toward the core 30 or a maximum percentage of cladding removal for any given scattering site 40. The process used, and resulting surface profile of each scattering site 40, is likely to render a range of depths for any given scattering site 40. In some embodiments, the range of depths may be minimized and essentially random. In other embodiments, the range of depths may be provided with a general profile, like the concave areas represented in
The side-emitting optical fiber 20 may include at least one coating 50 applied to the exterior surface 36 and scattering sites 40 of the cladding 32. The coating 50 may be between about 10 and about 70 microns thick. The coating 50 may be provided as a layer of protection for the core 30 and the cladding 32. The coating 50 should be at least translucent, if not fully transparent, in locations corresponding with the scattering sites 40. The coating 50 may have light transmission windows or have generally uniform light transmission characteristics. The coating 50 may be made from acrylate. The refractive index of the coating 50 may be 1.56 relative to the refractive index of the optical cladding 32 of 1.35.
The side-emitting optical fiber 20 may also include an ink layer 60 applied to the coating 50. The ink layer 60 may be selectively applied to locations corresponding with the scattering sites 40. Alternatively, the ink layer 60 may be uniformly applied to the coating 50. The ink layer 60 may have further scattering elements, such as titanium oxide spheres, configured to diffuse the light being emitted from the side-emitting optical fiber 20. The ink layer 60 is configured to provide each tracer location 4 with an approximate Lambertian distribution pattern.
The side-emitting optical fiber 20 of the present disclosure has been described for use in facilitating traceability of a cable 3. In some embodiments, the side-emitting optical fiber 20 may have uses independent of the cable 3. For example, the side-emitting optical fiber 20 may not be used for tracing at all, but may itself provide decorative or functional illumination or indication.
Side-emitting optical fibers 20 according to this disclosure may be manufactured according to a process schematically illustrated in
After the cladding 32 is at least partially cured, the scattering sites 40 may be created by ablating the exterior surface 36 with at least one high intensity light source, such as a laser 76 as the cladded core 33 is drawn past. Two or more light sources positioned around the core 30 may be provided to achieve the desired arc sweep for each scattering site 40. The high intensity light impacts the cladding 32 and forms the scattering sites 40 by vaporizing or burning off some of the cladding 32 while locally affecting other portions of the cladding 32 to produce the resulting locally roughened surface as shown in
In one embodiment, each laser 76 is a CO2 laser, running at a repetition rate of 0.25 Hz to 100000 Hz with pulse energies of approximately 10000 W/s to 20000 W/s and pulse duration of 0.1 μs to 10 seconds. As will be appreciated by one of ordinary skill in the art, other types of lasers, emitting other wavelengths of light, may be used. The repetition rate, pulse energy, and pulse duration may all be adjusted based on the draw rate of the cladded core 33 to achieve scattering sites 40 with the desired separation P, magnitude M, and depth D.
After the formation of the scattering sites 40 penetrating the exterior surface 36 of the cladding 32, the cladded core 33 may pass through a second liquid die block 80 where a similar pultrusion process may add a coating 50 over the ablated cladding. The coating 50 may be cured as it passing through a second curing station (not shown), or may be cured by other known means, such as temperature.
To provide a smoother, more Lambertian, light distribution pattern from the side-emitting optical fiber 20, a scattering ink layer 60 may be applied onto the coating 50 at a third liquid die block 84, or other processing unit, such as a spray applicator or printer.
In one embodiment, the side-emitting optical fiber 20 is manufactured on a single draw. As will be understood by those of skill in the art, the side-emitting optical fiber 20 can be produced in a continuous fashion on a single line, at a single location. Alternatively, it is possible that the side-emitting optical fibers 20 of the present description could also be produced by discrete steps at separate locations. For example, the core 30 may be wound up, transported between locations or manufacturing stations, and then run through the first liquid die block 70 for cladding. In another example, the scattering sites 40 may be created separate from the drawing of the cladded cores 33.
The side-emitting optical fibers 20 may continue on the single line directly to the manufacture of the cable 3. Alternatively, the side-emitting optical fiber 20 may be separately combined with the data transmission elements 7 and the jacket 10 in a different location or distinct time. In one embodiment, an extrusion or pultrusion process may be used to at least partially embed the side-emitting optical fiber 20 with the jacket 10 as the jacket 10 is being formed around the data transmission element 7. The side-emitting optical fiber 20 may be combined with at least one data transmission element 7 and a jacket 10 by a variety of processes known in the art, depending upon the particular type of cable 3 that is being manufactured.
Cable assemblies 1 may be made by cutting the cable 3 to a desired length and attaching the desired connectors 5 to each end according to processes known in the art, and dependent upon the type of cable assembly 1 being produced. For example, the connector 5 may be SC, LC, ST, FC, or MPO type connectors.
The side-emitting optical fibers 20, cables 3 that incorporate the side-emitting optical fibers 20, and cable assemblies 1 that incorporate the cables 3, each have several advantages that will be apparent to one of ordinary skill in the art. Particularly, use of a side-emitting optical fiber 20 within the cable 3 provides an improved ability for a network operator to quickly and efficiently trace a particular cable assembly 1 so that a traced end can be identified from a predetermined launched end of the cable assembly 1. The side-emitting optical fibers 20 of this disclosure can be configured to facilitate the ability to trace along the full length of the cable 3. This may be helpful to identify tangles or knots. This may also help when the particular equipment rack 110, in which the traced end is connected, is unknown. For example, equipment racks 110 often have front doors that are kept closed. Tracing along the length of the cable 3 may help identify which rack to search. If a tracer location 4 were only on the traced end the cable 3, it may be hidden behind the door.
While side-emitting optical fibers 20 according to this disclosure may provide tracer locations 4 along the length of a cable 3, they are usually not intended to provide continuous illumination along the length. As a result, the side-emitting optical fibers 20 are able to make more efficient use of a tracer source light. This means that tracer locations 4 can be provided along cables 3 of significant length, for example 30m or more, while the tracer locations 4 may remain sufficiently bright to be readily visible in a well-lit room using a tracer source light of reasonable intensity.
A tracer light source may be integrated into the cable 3, or the connector 5, to illuminate the side-emitting optical fiber 20. In some embodiments, however, a separate tracer light source may be used to selectively emit light into the side-emitting optical fiber 20. By using a separate tracer light source, the cost of the cable 3 may be reduced compared to systems integrating a light source or using active light sources along the length to form the individual tracer locations 4.
In advantageous embodiments, the side-emitting optical fiber 20 can be made with a continuous manufacturing process where each step is performed on a single draw. Such a continuous process may provide a high rate of manufacture with minimum waste, transportation costs or labor costs. Use of laser ablation to form the scattering sites 40 provides a processing step that can be readily controlled in terms of pulse rate, pulse energy, and duration to finely tune the separation, arc sweep, and magnitude of the scattering sites 40 to achieve the best combination of traceability, brightness, and manufacturing efficiency.
Persons skilled in waveguide technology will appreciate additional variations and modifications of the devices and methods already described. Additionally, where a method claim below does not explicitly recite a step mentioned in the description above, it should not be assumed that the step is required by the claim. Furthermore, where a method claim below does not actually recite an order to be followed by its steps or an order is otherwise not required based on the claim language, it is not intended that any particular order be inferred.
The above examples are in no way intended to limit the scope of the present invention. It will be understood by those skilled in the art that while the present disclosure has been discussed above with reference to examples of embodiments, various additions, modifications and changes can be made thereto without departing from the spirit and scope of the invention as set forth in the claims.
This application claims the benefit of priority under 35 U.S.C. §119 of U.S. Provisional Application Ser. No. 62/140,620, filed on Mar. 31, 2015, the content of which is relied upon and incorporated herein by reference in its entirety.
| Number | Name | Date | Kind |
|---|---|---|---|
| 4412936 | Khmelkov et al. | Nov 1983 | A |
| 4557552 | Newton et al. | Dec 1985 | A |
| 4755018 | Heng et al. | Jul 1988 | A |
| 4923274 | Dean | May 1990 | A |
| 5006806 | Rippingale et al. | Apr 1991 | A |
| 5017873 | Rippingale et al. | May 1991 | A |
| 5040867 | de Jong et al. | Aug 1991 | A |
| 5122750 | Rippingale et al. | Jun 1992 | A |
| 5206065 | Rippingale et al. | Apr 1993 | A |
| 5305405 | Emmons et al. | Apr 1994 | A |
| 5333228 | Kingstone | Jul 1994 | A |
| 5377292 | Bartling et al. | Dec 1994 | A |
| 5394496 | Caldwell et al. | Feb 1995 | A |
| 5500913 | Allen | Mar 1996 | A |
| 5982967 | Mathis et al. | Nov 1999 | A |
| 6173097 | Throckmorton et al. | Jan 2001 | B1 |
| 6257750 | Strasser et al. | Jul 2001 | B1 |
| 6293081 | Grulick et al. | Sep 2001 | B1 |
| 6314713 | Fitz et al. | Nov 2001 | B1 |
| 6317553 | Harper, Jr. | Nov 2001 | B1 |
| 6347172 | Keller | Feb 2002 | B1 |
| 6379054 | Throckmorton et al. | Apr 2002 | B2 |
| 6388194 | Ryeczek | May 2002 | B1 |
| 6439780 | Mudd et al. | Aug 2002 | B1 |
| 6456785 | Evans | Sep 2002 | B1 |
| 6560390 | Grulick et al. | May 2003 | B2 |
| 6596943 | Ward | Jul 2003 | B1 |
| 6606431 | Unsworth | Aug 2003 | B2 |
| 6678449 | Thompson et al. | Jan 2004 | B2 |
| 6695491 | Leeman et al. | Feb 2004 | B1 |
| 6728453 | Petryszak | Apr 2004 | B2 |
| 6798956 | Morrison | Sep 2004 | B2 |
| 6816661 | Barnes et al. | Nov 2004 | B1 |
| 6823120 | Hurley et al. | Nov 2004 | B2 |
| 6933438 | Watts et al. | Aug 2005 | B1 |
| 7029137 | Lionetti et al. | Apr 2006 | B2 |
| 7038135 | Chan et al. | May 2006 | B1 |
| 7049937 | Zweig et al. | May 2006 | B1 |
| 7242831 | Fee | Jul 2007 | B2 |
| 7401961 | Longatti et al. | Jul 2008 | B2 |
| 7406231 | Beck et al. | Jul 2008 | B1 |
| 7524082 | North | Apr 2009 | B2 |
| 7671279 | Yin | Mar 2010 | B2 |
| 7748860 | Brunet | Jul 2010 | B2 |
| 7920764 | Kewitsch | Apr 2011 | B2 |
| 7932805 | Darr et al. | Apr 2011 | B2 |
| 7948226 | Rathbun, II | May 2011 | B2 |
| 8000576 | Chen et al. | Aug 2011 | B2 |
| 8102169 | Law et al. | Jan 2012 | B2 |
| 8150227 | Kewitsch | Apr 2012 | B2 |
| 8322871 | Knaggs | Dec 2012 | B1 |
| 8428405 | Kewitsch | Apr 2013 | B2 |
| 8492448 | Dewa et al. | Jul 2013 | B2 |
| 8545076 | Bickham et al. | Oct 2013 | B2 |
| 8548293 | Kachmar | Oct 2013 | B2 |
| 8591087 | Bickham et al. | Nov 2013 | B2 |
| 8620123 | Dean, Jr. | Dec 2013 | B2 |
| 8620125 | Button et al. | Dec 2013 | B2 |
| 8724942 | Logunov et al. | May 2014 | B2 |
| 8896286 | Abuelsaad et al. | Nov 2014 | B2 |
| 8896287 | Abuelsaad et al. | Nov 2014 | B2 |
| 8903212 | Kachmar | Dec 2014 | B2 |
| 20010048797 | Van Dijk et al. | Dec 2001 | A1 |
| 20020009282 | Grulick et al. | Jan 2002 | A1 |
| 20020037133 | Unsworth | Mar 2002 | A1 |
| 20020185299 | Giebel | Dec 2002 | A1 |
| 20030002830 | Petryszak | Jan 2003 | A1 |
| 20030016924 | Thompson et al. | Jan 2003 | A1 |
| 20030206519 | Sanders et al. | Nov 2003 | A1 |
| 20040022504 | Hurley et al. | Feb 2004 | A1 |
| 20040146254 | Morrison | Jul 2004 | A1 |
| 20040160774 | Lionetti et al. | Aug 2004 | A1 |
| 20040179777 | Buelow, II et al. | Sep 2004 | A1 |
| 20060285350 | Wang | Dec 2006 | A1 |
| 20070153508 | Nall et al. | Jul 2007 | A1 |
| 20080121171 | Hulsey | May 2008 | A1 |
| 20080198618 | North | Aug 2008 | A1 |
| 20080273844 | Kewitsch | Nov 2008 | A1 |
| 20090297104 | Kachmar | Dec 2009 | A1 |
| 20100021114 | Chen et al. | Jan 2010 | A1 |
| 20100148747 | Rathbun, II et al. | Jun 2010 | A1 |
| 20100166374 | Lapp | Jul 2010 | A1 |
| 20110103757 | Alkemper et al. | May 2011 | A1 |
| 20110122646 | Bickham et al. | May 2011 | A1 |
| 20110150488 | Kewitsch | Jun 2011 | A1 |
| 20110305035 | Bickham et al. | Dec 2011 | A1 |
| 20120219259 | Kewitsch | Aug 2012 | A1 |
| 20120275745 | Logunov | Nov 2012 | A1 |
| 20130088888 | Fewkes et al. | Apr 2013 | A1 |
| 20140016904 | Kachmar | Jan 2014 | A1 |
| 20140070639 | Tamura | Mar 2014 | A1 |
| 20140363134 | Bookbinder et al. | Dec 2014 | A1 |
| 20150049992 | Bauco | Feb 2015 | A1 |
| Number | Date | Country |
|---|---|---|
| 200941319 | Aug 2007 | CN |
| 201429706 | Mar 2010 | CN |
| 102589728 | Jul 2012 | CN |
| 202305952 | Jul 2012 | CN |
| 10239602 | Feb 2004 | DE |
| 102007025494 | Dec 2008 | DE |
| 0952589 | Oct 1999 | EP |
| 1168025 | Jan 2002 | EP |
| 2260198 | Apr 1993 | GB |
| 2375898 | Nov 2002 | GB |
| 57-11305 | Jan 1982 | JP |
| 59-182404 | Oct 1984 | JP |
| 61-139221 | Jun 1986 | JP |
| 61-161827 | Oct 1986 | JP |
| 2-55506 | Feb 1990 | JP |
| 2-108007 | Apr 1990 | JP |
| 02108808 | Apr 1990 | JP |
| 6-017157 | Mar 1994 | JP |
| 9-178956 | Jul 1997 | JP |
| 9-237524 | Sep 1997 | JP |
| 10-0875507 | Dec 2008 | KR |
| 0011484 | Mar 2000 | WO |
| 2005106899 | Nov 2005 | WO |
| 2006113114 | Oct 2006 | WO |
| Entry |
|---|
| Side Emitting Super Glowing Fiber, MeshTel—Intelite, Inc., 1996-2015, downloaded from Web Jan. 5, 2016, 2 pages. |
| Super Vision Side Glow Cable, TriNorth Lighting, Inc., 2016, downloaded from Web Jan. 5, 2016, 2 pages. |
| U.S. Appl. No. 14/295,844, Bookbinder et al., filed Jun. 4, 2014, 25 pages. |
| Side Emitting Super Glowing Fiber, Diode Lasers, Meshtel Lasers Fiber Optics Communications, Jan. 1, 2013, 1 page. |
| Specifications of our Fiber and Cable, N.p., n.d. Web, Aug. 9, 2013, 2 pages. |
| Polymer Photonics: An Overview, M. Rajesh, 2011, 38 pages. |
| Optical fiber with nanostructured cladding of TiO2 nanoparticles self-assembled onto a side polished fiber and its temperature sensing, Lu et al., Optics Express, vol. 22, No. 26, Dec. 29, 2014, 7 pages, downloaded from internet on Jan. 5, 2015. |
| Schott SpectraStream Glass Harnesses, Rev. Nov. 2006, 2 pages. |
| Side-Emitting Fibers Brighten Our World in New Ways, Janis Spigulis, Oct. 2005, 6 pages. |
| Patent Cooperation Treaty International Search Report, Application No. PCT/US2013/025262, Jul. 16, 2013, 7 pages. |
| Patent Cooperation Treaty International Search Report, Application No. PCT/US2014/049524, Jan. 20, 2015, 5 pages. |
| Patent Cooperation Treaty International Search Report, Application No. PCT/US2014/049525, Jan. 23, 2015, 18 pages. |
| Number | Date | Country | |
|---|---|---|---|
| 61140620 | Mar 2015 | US |
