多通道干涉大范围可调谐激光器控制系统(特邀)  

Control System of Multi-channel Interference Widely Tunable Laser(Invited)

作　　者：陈子枫 王宽宽 蒋春 陈泉安 陆巧银 国伟华 CHEN Zifeng;WANG Kuankuan;JIANG Chun;CHEN Quanan;LU Qiaoyin;GUO Weihua(Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学武汉光电国家研究中心,武汉430074

出　　处：《光子学报》2022年第2期80-89,共10页Acta Photonica Sinica

基　　金：国家重点研究发展计划(No.2018YFB2201201)。

摘　　要：多通道干涉大范围可调谐半导体激光器是波分复用系统中的新型关键器件,设计了一套针对此激光器高精度电流注入、温度控制、波长锁定等问题的控制系统。将该激光器的整套控制方案集成单板。在该控制系统下,测试得到激光器输出波长在1524~1572 nm中每间隔0.4 nm的120个ITU标准波长光谱图,调谐范围超过48 nm,并且在整个调谐范围内,边模抑制比超过了45 dB,波长偏差与ITU标准波长相差小于±10 pm,线宽小于100 kHz。Monolithic integrated widely tunable semiconductor laser is one of the key devices of photonic integrated circuit and next-generation reconfigurable optical network.In 2016,Wuhan National Laboratory for Optoelectronics of Huazhong University of science and technology proposed and experimentally verified a new type of widely tunable laser multi-channel interference widely tunable laser(hereinafter referred to as MCI-WTL),which has the advantages of low cost,large fabrication tolerance and excellent performance.In this paper,a set of control system is designed to solve the problems of high-precision current injection,temperature control,wavelength locking and so on.A complete scheme of MCI-WTL control is integrated into a single PCB board to realize the miniaturization and integration of control,which is of great significance to promote the commercial application of this laser.Firstly,the control system is introduced,including the control principle and control requirements of MCI-WTL,the physical diagram of software and hardware of the system,innovation and research significance.Then the principle of the control system is analyzed in detail.The hardware part includes the main control chip STM32F429;2 ADN8810 output two channels of 0~300 mA controllable current to work in the active section and SOA section to realize laser generation and optical power amplification;8 AD9744outputs 8 channels of 0~20 mA high-speed controllable current,which works in the common phase area and 7 arm phase areas to realize wavelength tuning.Digital Proportional Integration Differentiation(P-ID)algorithm is used for temperature control.In the wavelength locking part,a unique reflection peak locking technology is proposed to compensate the wavelength deviation.In the software part,LabView is used to make the upper computer interface,and the interaction between the host and the control module is carried out through the upper computer software,which can switch the wavelength and adjust the power in real time.Then the principle of temperatur

关 键 词：调谐激光器 波分复用 微处理器 温度控制 波长锁定 线宽 

分 类 号：TN29[电子电信—物理电子学]