Pump-Suppressed Nondegenerate Four-Wave Mixing in a Highly Nonlinear Photonic Crystal Fiber Sagnac Loop

• Published in: IEEE photonics technology letters Vol. 20; no. 24; pp. 2129 - 2131
• Main Authors: Jianguo Liu, Jianguo Liu, Yong-Kee Yeo, Yong-Kee Yeo, Yixin Wang, Yixin Wang, Lifang Xue, Lifang Xue, Dawei Wang, Dawei Wang, Weifeng Rong, Weifeng Rong, Luying Zhou, Luying Zhou, Gaoxi Xiao, Gaoxi Xiao, Xiaojun Yu, Xiaojun Yu, Tee-Hiang Cheng, Tee-Hiang Cheng
• Format: Journal Article
• Language: English
• Published: New York IEEE 15.12.2008; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Bandwidth; Conversion; Crystal fibers; Degradation; Filters; Four-wave mixing; Highly nonlinear photonic crystal fiber; Laser excitation; Noise levels; nondegenerate four-wave mixing (FWM); Nonlinearity; Optical wavelength conversion; Photonic crystal fibers; Photonic crystals; Polarization; Pumps; pumps suppression; Sagnac interferometers; symmetrical Sagnac loop; Wavelength conversion; Wavelengths
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2008.2007131

We propose a configuration for suppressing pumps in a broad-and flat-band tunable nondegenerate four-wave mixing (FWM) wavelength converter. The signal and pumps are coupled into a highly nonlinear photonic crystal fiber symmetrical Sagnac loop. After the FWM wavelength conversion in the loop, the idler is separated from the pumps without a filter. In our experiment, a flat wavelength conversion bandwidth of 36 nm, conversion efficiency of -11 dB, pump-to-signal suppression ratio of 48 dB, and idler-to-pump suppression ratio of 15 dB are achieved.