Device and method to control the output power of laser diodes

Details Device and method to control the output power of laser diodes Device and method to control the output power of laser diodes

1993-07-30

1995-01-17

Healy, Brian

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 34, 372 38, 372 43, 372109, 372 50, H01S 313

Patent

active

053832086

ABSTRACT:
A device for the control of the output power of laser diodes designed to be coupled to an optical fiber for the tranmission of data comprises a photodiode that can be used to acquire a characteristic signal of the power emitted by the laser diode; digital means to drive the laser diode comprising a central processing unit associated with servo-control computation program memorizing means to keep a constant output power whatever may be the drift and change of slope of the characteristic of the laser diode in response to ageing phenomena or to a change in temperature or to a loss of power due to the coupling of this diode with an optical fiber or to variations in the response of the photodiode as a function of the temperature. Application to digital transmission by optical fiber.

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patent: 5317578 (1994-05-01), Ogou

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