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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.6
- 수록면
- 289 - 297 (9page)
이용수
초록· 키워드
오류제보하기
We describe a comb-mode resolving spectroscopic technique by direct time-domain phase correction of unstable interferograms obtained from loosely locked two femtosecond lasers. A low-cost continuous wave laser and conventional repetition rate stabilization method were exploited for locking carrier and envelope phase of interferograms, respectively. We intentionally set the servo control at low bandwidth, resulting in severe interferograms’ fluctuation to demonstrate the capability of the proposed correction method. The envelope phase of each interferogram was estimated by a quadratic fit of carrier peaks to correct timing fluctuation of interferograms in the time domain. After envelope phase correction on individual interferograms, we successfully demonstrated 1 Hz linewidth of RF comb-mode over 200 GHz optical spectral-bandwidth with 10-times signal-to-noise ratio (SNR) enhancement compared to the spectrum without correction. Besides, the group delay difference between two femtosecond pulses is successfully estimated through a linear slope of phase information.
목차
Ⅰ. INTRODUCTION
Ⅱ. BASIC PRINCIPLE AND SYSTEM IMPLEMENTATION
Ⅲ. EXPERIMENTAL RESULTS
Ⅳ. DISCUSSION AND CONCLUSION
REFERENCES
참고문헌 (33)
참고문헌 신청
T. W. Hänsch / 2006 / Nobel lecture: passion for precision / Rev. Mod. Phys 78:1297~1309
T. Udem / 2002 / Optical frequency metrology / Nature 416:233~237
S.-W. Kim / 2009 / Combs rule / Nat. Photon 3:313~314
N. R. Newbury / 2011 / Searching for applications with a fine-tooth comb / Nat. Photon 5:186~188
B. Bernhardt / 2010 / Cavity-enhanced dual-comb spectroscopy / Nat. Photon 4:55~57
T. Udem / 2002 / Optical frequency metrology / Nature 416:233~237
S.-W. Kim / 2009 / Combs rule / Nat. Photon 3:313~314
N. R. Newbury / 2011 / Searching for applications with a fine-tooth comb / Nat. Photon 5:186~188
B. Bernhardt / 2010 / Cavity-enhanced dual-comb spectroscopy / Nat. Photon 4:55~57
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