Patent ID: 6891868
Filing Date: 2005-05-10
Classification: H01S

Abstract:
1. A laser noise control system operating in conjunction with a laser driver, wherein the laser driver produces a laser drive signal that is provided to a laser so as to produce an optical signal, the laser noise control system comprising: a beam splitter positioned to receive the optical signal and output a first portion and a second portion thereof; an optical sensor positioned to receive the first portion of the optical signal, the optical sensor thus capable of producing a sensor output signal indicative of the optical signal; a noise reduction feedback network operatively connected to the optical sensor and to the laser, the noise reduction feedback network configured to include a filter circuit which receives the sensor output signal and produces a filtered noise reduction signal which is combined with the laser driver signal and provided to the laser; a LF control loop operatively attached between the optical sensor and the laser driver to provide CW control of the laser; and a control switch to selectively operate the noise reduction feedback network.