Claims
- 1. An apparatus for adding and dropping optical signals from an input waveguide, said input waveguide carrying a plurality of wavelength channels including a drop wavelength channel, said apparatus comprising:
an output waveguide carrying an add wavelength channel; a drop bridge waveguide having drop Bragg gratings formed on a first end and a second end, said drop Bragg gratings having a periodicity matched to said drop wavelength channel, said first end proximal to said input waveguide and said second end proximal to said output waveguide; and an add bridge waveguide having add Bragg gratings formed on a first end and a second end, said add Bragg gratings having a periodicity matched to said add wavelength channel, said first end proximal to said input waveguide and said second end proximal to said output waveguide.
- 2. The apparatus of claim 1 wherein said drop bridge waveguide and said add bridge waveguide intersect to form an X-type switch.
- 3. The apparatus of claim 1 wherein said plurality of wavelength channels travel in a first direction along said input waveguide and said first end of said drop bridge waveguide is upstream from said first end of said add bridge waveguide.
- 4. The apparatus of claim 3 wherein said add wavelength channels travel along said output waveguide in a first direction and said second end of said add bridge waveguide is upstream from said second end of said drop bridge waveguide.
- 5. An apparatus for dropping optical signals from an input waveguide, said input waveguide carrying a plurality of wavelength channels including a drop wavelength channel, said apparatus comprising:
an output waveguide; and a drop bridge waveguide formed as a closed loop waveguide disposed between said input waveguide and said output waveguide, said drop bridge waveguide having drop Bragg gratings formed on a first side and a second side, said drop Bragg gratings having a periodicity matched to said drop wavelength channel, said first side proximal to said input waveguide and said second side proximal to said output waveguide.
- 6. The apparatus of claim 5 further adapted for injecting an add wavelength channel to said input waveguide, said apparatus further including an add bridge waveguide as a closed loop waveguide disposed between said input waveguide and said output waveguide, said add bridge waveguide having add Bragg gratings formed on a first side and a second side, said add Bragg gratings having a periodicity matched to said add wavelength channel, said first side proximal to said input waveguide and said second side proximal to said output waveguide, said output waveguide carrying said add wavelength channel.
- 7. The apparatus of claim 5 further including additional closed loop drop bridge waveguides disposed between said input waveguide and said output waveguide, said each one of said additional closed loop drop bridge waveguides having formed thereon drop Bragg gratings adapted to the periodicity of one of said plurality of wavelength channels.
- 8. The apparatus of claim 6 further including additional closed loop drop bridge waveguides disposed between said input waveguide and said output waveguide, said each one of said additional closed loop drop bridge waveguides having formed thereon drop Bragg gratings adapted to the periodicity of one of said plurality of wavelength channels.
- 9. The apparatus of claim 8 further including additional closed loop add bridge waveguides disposed between said input waveguide and said output waveguide, said each one of said additional closed loop add bridge waveguides having formed thereon add Bragg gratings adapted to the periodicity of additional add wavelength channels.
- 10. An apparatus for adding optical signals to an input waveguide, said input waveguide carrying a plurality of wavelength channels, said apparatus comprising:
an output waveguide carrying an add wavelength channel; and an add bridge waveguide formed as a closed loop waveguide disposed between said input waveguide and said output waveguide, said add bridge waveguide having add Bragg gratings formed on a first side and a second side, said add Bragg gratings having a periodicity matched to said add wavelength channel, said first side proximal to said input waveguide and said second side proximal to said output waveguide.
- 11. An apparatus for adding and dropping multiple optical signals from an input waveguide, said input waveguide carrying a plurality of wavelength channels including a plurality of drop wavelength channels, said apparatus comprising:
an output waveguide carrying a plurality of add wavelength channels; and a plurality of X-type switches placed between said output waveguide and said input waveguide, each of said plurality of X-type switches comprising:
(a) a drop bridge waveguide having drop Bragg gratings formed on a first end and a second end, said drop Bragg gratings having a periodicity matched to one of said plurality of drop wavelength channels, said first end proximal to said input waveguide and said second end proximal to said output waveguide; and (b) an add bridge waveguide having add Bragg gratings formed on a first end and a second end, said add Bragg gratings having a periodicity matched to one of said plurality of add wavelength channels, said first end proximal to said input waveguide and said second end proximal to said output waveguide, said add bridge waveguide intersecting with said drop bridge waveguide.
- 12. The apparatus of claim 11 wherein said X-type switches are arranged serially along said input waveguide.
- 13. An apparatus for adding to and dropping from an input waveguide, said input waveguide carrying a plurality of wavelength channels including a drop wavelength channel, said apparatus comprising:
a drop waveguide intersecting with said input waveguide; a drop bridge waveguide having drop Bragg gratings formed on a first end and a second end, said drop Bragg gratings having a periodicity matched to said drop wavelength channel, said first end proximal to said input waveguide and said second end proximal to said drop waveguide; an add waveguide intersecting with said input waveguide and carrying an add wavelength channel; and an add bridge waveguide having add Bragg gratings formed on a first end and a second end, said add Bragg gratings having a periodicity matched to said add wavelength channel, said first end proximal to said input waveguide and said second end proximal to said add waveguide.
- 14. The apparatus of claim 13 further including
a second drop waveguide intersecting with said input waveguide; a second drop bridge waveguide having drop Bragg gratings formed on a first end and a second end, said drop Bragg gratings having a periodicity matched to a second drop wavelength channel carried in said input waveguide, said first end proximal to said input waveguide and said second end proximal to said drop waveguide; a second add waveguide intersecting with said input waveguide and carrying a second add wavelength channel; and a second add bridge waveguide having add Bragg gratings formed on a first end and a second end, said add Bragg gratings having a periodicity matched to said second add wavelength channel, said first end proximal to said input waveguide and said second end proximal to said second add waveguide.
RELATED APPLICATIONS
[0001] Priority is hereby claimed under 35 U.S.C. §120 to U.S. Provisional Patent Application Serial No. 60/338,927 filed Oct. 22, 2001, U.S. Provisional Patent Application Serial No. 60/346,066 filed Jan. 3, 2002, U.S. Provisional Patent Application Serial No. 60/373,803 filed Apr. 19, 2002, U.S. patent application Ser. No. 10/104,273 filed Mar. 22, 2002, and U.S. patent application Ser. No. 10/___,___ filed Jun. 19, 2002, each of which is hereby incorporated by reference.
Provisional Applications (4)
|
Number |
Date |
Country |
|
60338927 |
Dec 2001 |
US |
|
60346066 |
Jan 2002 |
US |
|
60346567 |
Jan 2002 |
US |
|
60373803 |
Apr 2002 |
US |