High frequency optical pulse source

Details High frequency optical pulse source High frequency optical pulse source

2005-08-09

2005-08-09

Wong, Don (Department: 2821)

Coherent light generators

Particular active media

Semiconductor

C372S096000

Reexamination Certificate

active

06928098

ABSTRACT:
Disclosed is a high frequency optical pulse source generating stable optical pulses over a wide current range in an optical transmission system to enhance stability and reliability, the high frequency optical pulse source implementing, in one chip, a multi-section distributed feedback (DFB) laser diode with a phase control section arranged between two DFB laser diodes. By controlling the current applied to the electrode of the phase control section while applying currents to the first and second DFB sections, the present invention causes self-mode locking between the compound-cavity modes having similar threshold currents, thereby generating stable tens GHz-level optical pulses. Hence, the present invention generates optical pulses uniformly over a wide current range, thereby enhancing the stability and reliability of the element.

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1994 IEEE, “High-Frequency Oscillations and Self-Mode Locking in Short External-Cavity Laser Diodes”, A. Tager, et al., vol. 30, No. 7, Jul. 1994, pp. 1553-1561.
Electronic Letters, Mar. 28th 2002, vol. 38, No. 7, pp. 334-335, “Optical microwave source”, S. Bauer, et al.

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