Power supply for a laser diode in a common module

Details Power supply for a laser diode in a common module Power supply for a laser diode in a common module

1988-08-19

1989-12-12

Davie, James W.

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 31, 372 36, 372 38, H01S 310

Patent

active

048872717

ABSTRACT:
A power supply for a laser diode comprising optical detector means coupled for monitoring the intensity of light emitted by the diode, the optical detector means being coupled, via capacitive means, for integrating the signal from the detector means, to the gate of a field effect transistor, the field effect transistor being coupled to the control electrode of a transistor means to control the main current path thereof, the transistor means being arranged to regulate the power supply to the laser diode, whereby the power output of the laser diode is stabilised. The power supply is incorporated with the diode in a module for connection to a printed circuit board for coupling to an optical fibre in a local area network.

REFERENCES:
patent: 3898583 (1975-08-01), Shuey
patent: 4803689 (1989-02-01), Shibanuma
M. A. Karr et al., "Output Power Stability of GaAlAs Laser Transmitters Using an Optical Tap for Feedback Control," Applied Optics, vol. 18, No. 8, Apr. 15, 1979, pp. 1262-1265.
"Fibre Optic Datalink P35-8800" Plessey Optoelectronics, 1986.

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