Whispering gallery mode resonator based ultra-narrow linewidth external cavity semiconductor laser

Details Whispering gallery mode resonator based ultra-narrow linewidth external cavity semiconductor laser Whispering gallery mode resonator based ultra-narrow linewidth external cavity semiconductor laser

2010-08-05

arxiv.org/abs/1008.0896v1

Physics

Optics

To be published in Optics Letters

Scientific paper

We demonstrate a miniature self-injection locked DFB laser using resonant optical feedback from a high-Q crystalline whispering gallery mode resonator. The linewidth reduction factor is greater than 10,000, with resultant instantaneous linewidth less than 200 Hz. The minimal value of the Allan deviation for the laser frequency stability is 3x10^(-12) at the integration time of 20 us. The laser possesses excellent spectral purity and good long term stability.

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