Claims
- 1. A light-guiding optical element comprising:a) an organic upper cladding layer; b) an organic light transmissive core comprising a fluoropolymer including at least one perfluorinated substituent selected from the group consisting of —(CF2)x—, —CF2O—[(CF2CF2O)m(CF2O)n]—CF2—, —CF(CF3)O(CF2)4O[CF(CF3)CF2O]pCF(CF3)—, and —CF2O—(CF2CF2O)m—CF2—, where x is 1-10, m and n designate the number of randomly distributed perfluoroethyleneoxy and perfluoromethyleneoxy backbone repeating subunits, respectively, and p designates the number of —CF(CF3)CF2O— backbone repeating subunits; c) an organic lower cladding layer; and d) a substrate.
- 2. The optical element of claim 1 wherein the fluoropolymer is produced from a core photopolymerizable composition including the compound where m and n designate the number of randomly distributed perfluoroethyleneoxy and perfluoromethyleneoxy backbone repeating subunits, respectively, and the ratio m/n falls within the range of about 0.5 to about 1.4.
- 3. The optical element of claim 2 wherein said core photopolymerizable composition further includes the compoundCH2═CHCO2CH2(CF2CF2O)m(CF2O)nCF2CH2O2CCH═CH2.
- 4. The optical element of claim 1 wherein the optical loss of 1550 nm light through said light transmissive core is less than 0.75 dB/cm.
- 5. The optical element of claim 4 wherein the optical loss of 1550 nm light through said light transmissive core is less than 0.5 dB/cm.
- 6. The optical element of claim 1 wherein the glass transition point of said upper cladding layer and lower cladding layer is about 40° C. or less and that of the light transmissive core is about 50° C. or less.
- 7. The optical element of claim 6 wherein the glass transition point of said light transmissive core is less than 0° C.
- 8. A waveguide grating made from the composition of claim 1.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a divisional application, filed under 37 C.F.R. §1.53(d), of U.S. application Ser. No. 09/745,076 filed on Dec. 20, 2000, now U.S. Pat. No. 6,555,288,which in turn is a continuation-in-part of U.S. application Ser. No. 09/337,337 filed on Jun. 21, 1999, now U.S. Pat. No. 6,306,563. The content of foregoing applications is relied on and the benefit of priority of the applications under 35 U.S.C. §120 is hereby claimed.
US Referenced Citations (15)
Non-Patent Literature Citations (1)
Entry |
L. Eldada, “Laser-Fabricated Low-Loss Single-Mode Raised-Rib Waveguiding Devices in Polymers”, Journal of Lightwave Technology., vol. 14, No. 7 (1996) 1704-1714. |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09/337337 |
Jun 1999 |
US |
Child |
09/745076 |
|
US |