Coherent light generators – Particular component circuitry – Optical pumping
Patent
1989-06-26
1991-08-13
Hille, Rolf
Coherent light generators
Particular component circuitry
Optical pumping
357 16, 357 17, 372 43, 372 50, H01L 3112, H01L 3116
Patent
active
050400339
ABSTRACT:
Briefly, in the invention a photodetector and an optical amplifier are integrated in the same semiconductor chip. The optical amplifier and the photodetector are positioned side-by-side on the same chip. A portion of the electromagnetic energy carried in the evanescent tail of the optical mode is detected by the photodetector for monitoring the average output power of the optical amplifier. Current confinement and lateral index guiding can be provided by Fe or Ti doped semi-insulating layers of InP. The side-by-side arrangement enables the detector to monitor the output power of the optical amplifier without degrading the output power of the optical amplifier.
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patent: 4759023 (1988-07-01), Yamaguchi
patent: 4805178 (1989-02-01), Wilt
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Liou et al., "Monolithic integrated . . . vapor deposition", Appl. Phys. Lett. 54 (2), 1/9/89.
Hsieh, "GaInAsP/InP Lasers . . . at 1.1-1.3 .mu.m", IEEE, 12/1978.
Dutta Niloy K.
Halemane Thirumala R.
Korotky Steven K.
AT&T Bell Laboratories
Hille Rolf
Tran Minhloan
Weiss Eli
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