Chinese Optics Letters, 2012, 10 (10): 101403, Published Online: Aug. 24, 2012
Polarization-locked VCSEL with PM f iber pigtail for quantum communication
Abstract
Quantum communication is a new technology requiring a stable and reliable laser source for communication security. A new kind of polarization-locked vertical-cavity surface-emitting laser (VCSEL) with polarization maintaining (PM) fiber pigtail is fabricated as a decoy state laser source. The VCSEL is packaged in a standard butterfly box integrated with thermoelectric coder (TEC) and thermistor. The optical pulse width of full-width at half-maximum (FWHM) is smaller than 400 ps with a 100-MHz on/off modulation frequency. The results reveal that modulation range is better than 4. Moreover, the polarization is stable, and the power extinction ratio is larger than 25. The center wavelength is 850 nm, and the SMSR is better than 40 dB.
Guofeng Xin, Li Shen, Haoyang Pi, Dijun Chen, Haiwen Cai, Huizhong Feng, Jianxin Geng, Ronghui Qu, Gaoting Chen, Zujie Fang, Weibiao Chen. Polarization-locked VCSEL with PM f iber pigtail for quantum communication[J]. Chinese Optics Letters, 2012, 10(10): 101403.