Optical communications – Transmitter – Including compensation
Reexamination Certificate
2011-06-14
2011-06-14
Curs, Nathan M (Department: 2613)
Optical communications
Transmitter
Including compensation
C398S185000, C398S194000, C398S199000, C398S201000
Reexamination Certificate
active
07962045
ABSTRACT:
An optical transmitter is disclosed including a widely tunable laser coupled to a periodic optical spectrum reshaper (OSR) to convert frequency modulated pulses from the laser into amplitude modulated pulses. The laser is tuned to generate pulses corresponding to passbands of the OSR spanning a wide range of frequencies. The laser includes a gain section having an optical path length substantially shorter than the total optical path length of the laser. The laser may be a Y-branch laser having reverse-biased sampled gratings or ring resonator filters tuned by stripe heaters. The laser may also include a reflective external cavity section tunable by modulating the temperature of ring resonators or etalons. The OSR may be integrally formed with the external cavity of the ECL laser.
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Mahgerefteh Daniel
Matsui Yasuhiro
McCallion Kevin John
Curs Nathan M
Finisar Corporation
Maschoff Gilmore & Israelsen
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