Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1994-07-14
1996-01-23
Boudreau, Leo H.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359140, 359139, 359135, 359128, 365215, 370 495, 385 24, H04J 1400, H04J 400, H04J 1408
Patent
active
054869439
ABSTRACT:
A photonic frequency division multiplexed FIFO buffer capable of realizing a multiple input one output FIFO buffer or a one input one output FIFO buffer by using only a small number of buffers. This buffer is formed by a plurality of loop shaped optical waveguide delay lines for storing the input optical signals from the time division multiplexed input highway, which are connected in series by a plurality of 2.times.2 optical switches for selectively transferring the input optical signals among the loop shaped optical waveguide delay lines. This buffer also includes a 1.times.2 frequency channel selector, connected at a last stage of the loop shaped optical waveguide delay lines, for selectively outputting optical signals in specific frequency channels among the input optical signals stored by the last stage of the loop shaped optical waveguide delay lines as the output optical signals to the timeslots on the time division multiplexed output highway.
REFERENCES:
patent: 5103333 (1992-04-01), Koai
patent: 5115428 (1992-05-01), Ramanan et al.
patent: 5175640 (1992-12-01), Eng et al.
patent: 5287316 (1994-02-01), Urushidani et al.
Article from Technical Digest Series, vol. 13, Topical Meeting on Photonic Switching, Mar. 18-20.
IEEE, Photonics Technology Letters, Jan. 1994, vol. 6.
Habara Keishi
Sasayama Koji
Boudreau Leo H.
Mehta Bhavesh
Nippon Telegraph and Telephone Corp.
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