Coherent light generators – Particular beam control device – Modulation
Reexamination Certificate
2011-01-11
2011-01-11
Van Roy, Tod T (Department: 2828)
Coherent light generators
Particular beam control device
Modulation
Reexamination Certificate
active
07869473
ABSTRACT:
A DBR laser, such as a semiconductor DBR laser is disclosed having improved frequency modulation performance. The laser includes a split gain electrode and a tuning electrode. A modulating current encoding a data signal is injected into a first section of the gain electrode whereas a substantially DC bias voltage is imposed on a second section of the gain electrode positioned between the first gain electrode and the tuning electrode. The first and second gain electrodes are electrically isolated from each other and the tuning electrode by a large isolation resistance. In some embodiments, the isolation resistance is generated by forming the electrodes on a P+ layer and removing portions of the P+ layer between adjacent electrodes. Capacitors may couple to one or both of the second gain electrode and the tuning electrode.
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Sa
Chen Hongmin
Mahgerefteh Daniel
Matsui Yasuhiro
Ye Xiong
Finisar Corporation
Roy Tod T Van
Stafford Patrick
Workman Nydegger
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