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Efficient diode laser line narrowing using dual, feed-forward + feed-back laser frequency control

Abstract : 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. This configuration appears to be very convenient as the delay in the feed-forward control electronics is easily compensated for by a 20 m optical fiber roll.
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https://hal.archives-ouvertes.fr/hal-01476485
Contributor : Michel Lintz Connect in order to contact the contributor
Submitted on : Friday, February 24, 2017 - 7:49:05 PM
Last modification on : Wednesday, May 25, 2022 - 3:18:37 AM
Long-term archiving on: : Thursday, May 25, 2017 - 2:41:03 PM

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Michel Lintz, Duy-Ha Phung, Jean-Pierre Coulon, Benoit Faure, Thomas Lévèque. Efficient diode laser line narrowing using dual, feed-forward + feed-back laser frequency control. Review of Scientific Instruments, American Institute of Physics, 2017, 88 (2), pp.26102 - 26102. ⟨10.1063/1.4975400⟩. ⟨hal-01476485⟩

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