상세정보
학술지
Highly Flat Optical Frequency Comb Generation based on Pulse Carving and Sinusoidal Phase Modulation
- 발행일
- 201907
- 출처
- Optical Engineering, v.58 no.7, pp.1-8
- ISSN
- 0091-3286
- 출판사
- SPIE
- 협약과제
- 19HB2700, 멀티밴드 신호전송을 위한 다중 광채널 발생/조형 기술 개발, 송민협
- 초록
- We investigate the relationship between an optical pulse shape and a time lens implemented by means of sinusoidal phase modulation. Based on this investigation, two schemes are proposed to obtain an optical frequency comb (OFC) with exceptionally high flatness and a large number of spectral lines by carving an optical pulse shape to result in a quasilinear chirp via a simple sinusoidal phase modulation technique. The first scheme utilizes an intensity modulator with a single-drive port or with dual-drive ports to carve a narrow pulse. The experimental results show very good spectral profiles with 38 OFC lines at 1.2-dB flatness and 53 lines at 1.5-dB flatness when the intensity modulator is combined with two and three phase modulators for sinusoidal phase modulation, respectively. The second scheme is implemented by replacing the intensity modulator by a dual-parallel Mach-Zehnder modulator (DP-MZM). In this case, we obtain 35 OFC lines at nearly perfect flatness of less than 1 dB and 53 lines at 1.5-dB flatness after combining the DP-MZM with two and three phase modulators, respectively.
- KSP 제안 키워드
- Dual-drive, Dual-parallel Mach-Zehnder modulator(DPMZM), Mach-Zehnder(MZ), Optical frequency comb generation, Optical pulse, Phase modulation technique, Pulse shape, Sinusoidal phase modulation, Three-Phase, Time lens, high flatness