Closed loop control system for laser

Details Closed loop control system for laser Closed loop control system for laser

1988-10-31

1990-09-25

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

250205, G01N 2188, H01S 3133

Patent

active

049589261

ABSTRACT:
A closed loop control system for a laser which is used in an instrument which may be an optical time domain reflectometer. The system uses the output light of the laser and the light from a fiber to which the laser light is connected to initially set the bias and pulse current amplitudes to the laser and adjust the gain of the receiver which is part of the control system. The control system also responds to light from the fiber to continuously control the pulse current amplitude and receiver gain so that the amplitude of the electrical signal representative of that light is kept within the operating range of the receiver electronics.

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