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|Title:||Coherent radio-frequency detection for narrowband direct comb spectroscopy|
|Citation:||Optics Express, 2016; 24(4):4088-4096|
|Publisher:||Optical Society of America|
|James D. Anstie, Christopher Perrella, Philip S. Light, and Andre N. Luiten|
|Abstract:||We demonstrate a scheme for coherent narrowband direct optical frequency comb spectroscopy. An extended cavity diode laser is injection locked to a single mode of an optical frequency comb, frequency shifted, and used as a local oscillator to optically down-mix the interrogating comb on a fast photodetector. The high spectral coherence of the injection lock generates a microwave frequency comb at the output of the photodiode with very narrow features, enabling spectral information to be further down-mixed to RF frequencies, allowing optical transmittance and phase to be obtained using electronics commonly found in the lab. We demonstrate two methods for achieving this step: a serial mode-by-mode approach and a parallel dual-comb approach, with the Cs D1 transition at 894 nm as a test case.|
|Rights:||© 2016 Optical Society of America|
|Appears in Collections:||Physics publications|
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