Stabilization of two frequency combs with a small relative fceo jitter using diode laser injection locking

Byung Jae Chun; Young-Jin Kim; Seung-Woo Kim

doi:10.1117/12.2212838

16 March 2016 Stabilization of two frequency combs with a small relative f_ceo jitter using diode laser injection locking

Byung Jae Chun, Young-Jin Kim, Seung-Woo Kim

Author Affiliations +

Proceedings Volume 9754, Photonic Instrumentation Engineering III; 97540O (2016) https://doi.org/10.1117/12.2212838
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

We report a novel stabilization method for two frequency combs with a small relative f_ceo jitter using a selected single optical mode out of a frequency comb. This proposed method is intended to stabilize optical frequencies which generated by two different optical combs with immunity to environmental disturbance, frequency drift and fluctuation with time so as to enhance the measuring performance of dual comb based spectroscopy and distance measurement. A single comb mode is selected out using a composite optical filtering and diode laser injection locking. The selected optical frequency yields a narrow relative linewidth less than 1 Hz and the frequency stability of 1.58×10^-17at 10 s averaging time. By using this, we generated heterodyned beat signal between generated optical frequency and another comb to stabilize relative f_ceo using phase lock-in control which adjust driving frequency of acousto-optic modulator. As a result of feedback control, the relative jitter is well stabilized down to 1.06×10^-15at 10 s averaging time. This highly stable frequency instability of two combs can perform to enhance the measuring resolution, accuracy and repeatability for dual comb based spectroscopy and distance metrology.

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Byung Jae Chun, Young-Jin Kim, and Seung-Woo Kim "Stabilization of two frequency combs with a small relative f_ceo jitter using diode laser injection locking", Proc. SPIE 9754, Photonic Instrumentation Engineering III, 97540O (16 March 2016); https://doi.org/10.1117/12.2212838

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