Active stabilization of a rapidly chirped laser by an optoelectronic digital servo-loop control.
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.
Gorju
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G
Laboratoire Aimé Cotton, CNRS, Université Paris Sud, Bâtiment 505, 91405 Orsay Cedex, France. guillame.gorju@lac.u-psud.fr
Jucha
A
A
Jain
A
A
Crozatier
V
V
Lorgeré
I
I
Le Gouët
J-L
JL
Bretenaker
F
F
Colice
M
M