中国激光, 2019, 46 (9): 0901003, 网络出版: 2019-09-10   

1550 nm波段窄线宽高调谐带宽激光光源 下载: 1313次

1550 nm Laser Source with Narrow Linewidth and High Tuning Bandwidth
作者单位
1 中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室, 上海 201800
2 中国科学院大学材料与光电研究中心, 北京 100049
3 上海科技大学物质科学与技术学院, 上海 201210
摘要
随着空间技术的发展,空间数据传输速率日益成为制约空间科技应用的瓶颈。空间相干光通信技术由于其较高的通信灵敏度、较强的抗干扰能力和较高的保密性成为研究的热点。在空间相干光通信技术中,零差相干光通信体制在理论上具有最好的灵敏度和抗干扰能力,但需要复杂的锁相闭环系统,对本振激光器的线宽和激光频率调谐带宽都提出了很高的要求。在1550 nm波段,现有的常规激光器难以同时满足窄线宽和高调谐带宽的要求。为此,采用窄线宽种子源结合外电光调制和窄带光栅滤波的方案,实现了光谱信噪比约为28 dB、线宽约为5 kHz、激光频率调谐带宽约为1.5 MHz的激光光源输出。
Abstract
With the development of space technology, spatial data transmission rate is becoming a bottleneck associated with its application. Spatial coherent optical communication technology has become a popular research topic in many countries because of its high communication sensitivity, anti-interference ability, and high confidentiality. In this technology, the homodyne coherent optical communication system theoretically exhibits optimal sensitivity and anti-interference ability, but simultaneously requires a complex phase-locked closed-loop system and a local oscillator laser with large linewidth and laser-frequency-tuning bandwidth. In the 1550-nm band, it is difficult for the conventional lasers to simultaneously satisfy the narrow linewidth and high tuning bandwidth requirements. Herein, a narrow linewidth seed source combined with external electro-optic modulation and narrowband grating filtering is used to create a laser source exhibiting a spectral signal-to-noise ratio of approximately 28 dB, a linewidth of approximately 5 kHz, and a laser-frequency-tuning bandwidth of approximately 1.5 MHz.

古建标, 朱福南, 刘磊, 赵思伟, 魏芳, 李璇, 朱韧, 侯霞, 陈卫标. 1550 nm波段窄线宽高调谐带宽激光光源[J]. 中国激光, 2019, 46(9): 0901003. Gu Jianbiao, Zhu Funan, Liu Lei, Zhao Siwei, Wei Fang, Li Xuan, Zhu Ren, Hou Xia, Chen Weibiao. 1550 nm Laser Source with Narrow Linewidth and High Tuning Bandwidth[J]. Chinese Journal of Lasers, 2019, 46(9): 0901003.

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