基于四波混频效应的1.5μm多波长单频光纤激光器(特邀)  

1.5 μm multi-wavelength single-frequency fiber laser based on four-wave mixing effect (Invited)

作　　者：张奕 侯玉斌[1,2] 张倩[1,2] 王璞[1,2] Zhang Yi;Hou Yubin;Zhang Qian;Wang Pu(Institute of Laser Engineering,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China;Beijing Engineering Research Center of Laser Applied Technology,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材料与制造学部激光工程研究院,北京100124 [2]北京工业大学北京激光应用技术工程研究中心,北京100124

出　　处：《红外与激光工程》2022年第6期118-124,共7页Infrared and Laser Engineering

基　　金：国家自然科学基金(61905006)。

摘　　要：利用笔者自主搭建的双波长单频光纤激光器作为种子,通过声光调制器以及多级光纤放大后,将激光注入至100 m长的高非线性光纤中,该光纤的零色散点在1 550 nm处。借助高非线性光纤的四波混频效应,最终在峰值功率13 W的泵浦下获得了一系列新的光谱成分,20 dB范围内共产生了46条新光谱。这些光谱跨越了1.337 THz,并且每条光谱中只包含一个纵模。由于新光谱基于四波混频效应产生,不同光谱之间不存在增益竞争等问题,因此,该激光器的多波长单频可以稳定存在,并且光谱强度接近。该多波长单频光纤激光器不仅具有线宽窄、相干性高、噪声低等优势,由于其还可以在全光纤结构下同时输出多个波长的单频激光,这使得其在波分复用光通信、光频率转换、激光雷达、微波光子学等领域具有十分重要的应用。Our self-built dual-wavelength single-frequency fiber laser was used as a seed, and after being amplified by an acousto-optic modulator and multi-stage fiber, the laser was injected into a 100-meter long high nonlinear fiber with the zero-dispersion point of at 1 550 nm. With the help of the four-wave mixing effect of the highly nonlinear fiber, a series of new spectral components were finally obtained under the pumping of the peak power of 13 W, and a total of 46 new spectra were generated in the range of 20 dB. These spectra spanned 1.337 THz and contained only one longitudinal mode in each spectrum. Since the new spectrum was generated based on the four-wave mixing effect, there was no gain competition between different spectra, so the multi-wavelength singlefrequency of the laser can exist stably, and the spectral intensity was close to each other. The multi-wavelength single-frequency fiber laser not only has the advantages of a single-frequency fiber laser such as narrow linewidth,high coherence, and low noise, but also can simultaneously output multiple wavelengths of single-frequency lasers in an all-fiber structure, which makes it possible to have very important applications in the fields of multiplexing optical communication, optical frequency conversion, lidar, microwave photonics and so on.

关 键 词：光纤激光器 单频 多波长 四波混频 

分 类 号：TN248[电子电信—物理电子学]