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Opt Lett. 2007 Mar 1;32(5):484-6.

Active stabilization of a rapidly chirped laser by an optoelectronic digital servo-loop control.

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  • 1Laboratoire Aimé Cotton, CNRS, Université Paris Sud, Bâtiment 505, 91405 Orsay Cedex, France.


We propose and demonstrate a novel active stabilization scheme for wide and fast frequency chirps. The system measures the laser instantaneous frequency deviation from a perfectly linear chirp, thanks to a digital phase detection process, and provides an error signal that is used to servo-loop control the chirped laser. This way, the frequency errors affecting a laser scan over 10 GHz on the millisecond timescale are drastically reduced below 100 kHz. This active optoelectronic digital servo-loop control opens new and interesting perspectives in fields where rapidly chirped lasers are crucial.

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