双波长锁模光纤激光器研究进展

doi:10.3969/j.issn.1007-5461.2023.05.001

摘要/Abstract

摘要： 随着超大容量光通信的发展，密集波分复用技术被广泛采用。该技术需要稳定的高重复频率超快脉冲序列作为信号源，若采用多个单一波长输出的锁模激光器作为激光光源，系统的成本和复杂性将显著提高；而双波长锁模激光器因具有双波长输出、脉冲持续时间短、光束质量好和可调谐范围宽等优点，可有效满足超大容量光通信所需信号源的要求。此外，该光源在光谱学、微波产生等领域也均有应用。双波长锁模光纤激光器可利用双谐振腔结构、二维材料的高非线性以及腔内滤波效应等设计实现，其中腔内滤波效应可通过在激光谐振腔内插滤波器件、多模干涉和非线性效应如非线性偏振旋转三种方式引入。目前双波长锁模光纤激光器的输出波长主要在1 μm和1.5 μm波段的光谱区域，输出功率为mW量级，未来将向实现输出中红外或更长工作波段以及瓦级输出功率方向发展。

关键词: 激光技术, 光纤激光器, 锁模, 双波长

Abstract: With the development of ultra-high capacity optical communication technology, dense wavelength division multiplexing (DWDM) technology is widely used. For DWDM technology, a stable high repetition rate ultrafast pulse laser source is required. If multiple single - wavelength mode-locked lasers are used as signal sources, the cost and complexity of the system will be very high. While dualwavelength mode-locked laser, due to its advantages of dual-wavelength output, short pulse duration, good beam quality, and wide tunable wavelength range, can overcome the disadvantage of multiple single - wavelength mode-locked lasers, and effectively meet the requirements for ultra-high capacity optical communication technology. In addition, this kind of light source is also widely used in the fields of spectroscopy and microwave generation. Dual-wavelength mode-locked fiber lasers can be realized using dual-resonator structure, high nonlinearity of two-dimensional materials and intra-cavity filtering effect. Specifically, intracavity filtering effect can be introduced by inserting filter devices directly into the laser resonator, using multimode interference or using nonlinear effects such as nonlinear polarization rotation. At present, the output wavelength of dual-wavelength mode-locked fiber lasers is mainly concentrated in the spectral region of 1μm and 1.5 μm band, and the output power is about milliwatt level. In the future, the laser will develop to achieve the output with mid-infrared or even longer wavelength, as well as the average power of watt-level.

Key words: laser techniques, fiber laser, mode locking, dual-wavelength

中图分类号:

TN248.1

刘梦媛, 齐瑶瑶, 白振旭, 张雨, 王静静, 丁洁, 王雨雷, 吕志伟, . 双波长锁模光纤激光器研究进展[J]. 量子电子学报, 2023, 40(5): 615-634.

LIU Mengyuan, , QI Yaoyao, , BAI Zhenxu, , ZHANG Yu, , WANG Jingjing, , DING Jie, , WANG Yulei , , LYU Zhiwei , . Research progress of dual⁃wavelength mode⁃locked fiber laser[J]. Chinese Journal of Quantum Electronics, 2023, 40(5): 615-634.

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