Control circuit for the drive current of a laser

Details Control circuit for the drive current of a laser Control circuit for the drive current of a laser

H - Electricity

01

S

325/1, 315/24

H01S 5/0683 (2006.01)

Patent

CA 1149021

PHN 9609 11 ABSTRACT: Control circuit for controlling a laser drive current. In known control circuits certain levels of the optical output signal are kept constant. This renders it difficult to satisfy certain requirements during the life of the laser as regards the linearity of the modulation of the optical output signal. In the described control circuit the intermodulation of two signals present in the modulation signal with substan- tially constant amplitudes is measured, an error signal which controls a component of the drive current being derived therefrom.

362085

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