Abstract

A sweep optical frequency synthesizer is demonstrated by using a frequency-stabilized optical frequency comb and injection-locked distributed-Bragg-reflector (DBR) laser diode. The injection-locked DBR laser acts as a single-frequency filter and, simultaneously, a high-gain amplifier of the optical frequency comb. The frequency instability of the heterodyne beat signal between two independently injection-locked DBR lasers is measured to be 2.3×1016 at 1s averaging time. The output frequency of the sweep optical frequency synthesizer can be precisely tuned over 1GHz, and a saturated absorption spectrum of the Cs D2 line at 852nm is recorded by the injected DBR laser.

© 2006 Optical Society of America

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