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Leaird, Daniel E.,Weiner, Andrew M.,Seo, Dongsun Institute of Korean Electrical and Electronics Eng 2014 전기전자학회논문지 Vol.18 No.1
We report stable, wideband, flat-topped, 10 GHz optical frequency comb generation from a semiconductor-based mode-locked ring laser with an intra-cavity high finesse Fabry-Perot etalon. We demonstrate a stable 10 GHz comb with greater than 200 lines within a spectral power variation below 1 dB, which is the largest value obtained from a similar mode-locked laser in our knowledge. Greater than 20 dB of the spectral peak to deep ratio at 0.02 nm resolution, ~92 femtosecond timing jitter over 1 kHz to 1 MHz range, and non-averaged time traces of pulses confirm very stable optical frequency comb lines.
Daniel E. Leaird,Andrew M. Weiner,서동선 한국전기전자학회 2014 전기전자학회논문지 Vol.18 No.1
We report stable, wideband, flat-topped, 10 GHz optical frequency comb generation from a semiconductor-based mode-locked ring laser with an intra-cavity high finesse Fabry-Perot etalon. We demonstrate a stable 10 GHz comb with greater than 200 lines within a spectral power variation below 1 dB, which is the largest value obtained from a similar mode-locked laser in our knowledge. Greater than 20 dB of the spectral peak to deep ratio at 0.02 nm resolution, ∼92 femtosecond timing jitter over 1 kHz to 1 MHz range, and non-averaged time traces of pulses confirm very stable optical frequency comb lines.
서동선,박종대,Daniel E. Leaird,Andrew M. Weiner 한국광학회 2015 Current Optics and Photonics Vol.19 No.4
We examine the principle of a modified Pound-Drever-Hall (PDH) technique to measure the free spectralrange of a Fabry-Perot etalon (FPE). The FPE’s periodic transmission of phase-modulated light allowsus to adopt a sampling theorem to develop a new relationship for the PDH error signal. This leads usto find the key parameters governing the measurement accuracy: the phase modulation index β and theFPE finesse. Without any additional complexity for background noise reduction, we achieve a measurementaccuracy of 0.5 ppm. The improvement is mainly attributed to the wide-band phase modulation approachingβ = 10, and partly to the use of both reflected and transmitted light from the FPE and good FPE finesse