Coherent light generators – Particular beam control device – Modulation
Patent
1988-04-07
1989-04-04
Sikes, William L.
Coherent light generators
Particular beam control device
Modulation
372 28, 372 29, 372 38, H01S 310
Patent
active
048192406
ABSTRACT:
A light modulator for modulating data signal to high frequency light signal includes a semiconductor laser diode having an input for receiving the data signal and an output for producing a laser beam, a light detector for receiving the laser beam and producing an electric signal representing the laser beam, and an electric passage between the light detector and the input of the semiconductor laser diode so as to define a positive feedback circuit for feeding the output of the semiconductor laser diode to the input of the same, whereby an oscillation at a resonance frequency is effected in the semiconductor laser diode to generate a light modulated high frequency laser signal from the semiconductor laser diode.
REFERENCES:
patent: 3617932 (1971-11-01), Paoli
patent: 3663897 (1972-05-01), Broom
"Speckle Noise Reduction in Fiber Optic Analog Video Transmission Using Semiconductor Laser Diodes", Ken-Ichi Sato et al, IEEE Transactions on Communications, vol. COM-29, No. 7, Jul. 1981.
Kaneiwa Shinji
Matsui Sadayoshi
Takiguchi Haruhisa
Yoshida Toshihiko
Epps Georgia Y.
Sharp Kabushiki Kaisha
Sikes William L.
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