Spectral Narrowing of Diode Laser with feed-forward 

Principal Investigator : Dr. Michel Lintz

Fundings : CNES

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Summary and Results :We have achieved DFB laser diode line narrowing by simultaneously acting on the diode current via a feedback loop and on an external electrooptic phase modulator in feed-forward actuator. This configuration turns out to be very efficient in reaching large bandwidth in the phase correction: up to 15 MHz with commercial laser control units. About 98% of the laser power undergoes narrowing. The full width at half maximum of the narrowed optical spectrum is of less than 4 kHz.

Former investigator : Dr. Ha Phung

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