600mW激光泵浦源控制系统的设计与制作

发布时间：2018-06-28 01:22

本文选题：激光泵浦 + 激光泵浦控制系统　；参考：《吉林大学》2015年硕士论文

【摘要】：随着近年来光纤通信技术的发展，掺铒光纤放大器（Erbium-Doped FiberAmplifier, EDFA）的应用也日渐广泛。为了满足EDFA对大功率、高稳定度激光泵浦源的需要，本文设计制作了一款600mW激光泵浦源控制系统。该控制系统集成了半导体驱动及温度控制两功能，并以市场常见的激光泵浦模块为应用对象。通过匹配泵浦模块的参数进行控制系统的电路设计，最终组成完整的激光泵浦源。其中泵浦模块就是一种将大功率激光二极管（LD）与半导体制冷器（TEC）封装在一起的蝶形器件。论文中，首先以恒流激励原理设计激光泵浦源控制系统的驱动单元，接着以TEC作为激光泵浦源的温度控制手段，设计了控制系统的温度控制单元。然后，分别对控制系统的驱动与温控单元进行了相关的电学实验测试，，主要包括驱动电流稳定性测试、驱动单元模拟实验、温控单元温度控制能力实验等。最后，选定一款泵浦模块，制作了一台完整的激光泵浦源样机，并对其激光输出做了详细的光学实验测试与研究，主要包括输出光功率与驱动电流关系实验、输出光功率稳定度实验研究与激光光谱测试等。经过相关实验研究，激光泵浦源控制系统驱动单元的输出电流范围为0-1A，在0.6A的输出电流条件下，具有508ppm的1小时短期稳定度和1448ppm的8小时长期稳定度。激光泵浦源控制系统的温控单元具有最大10W的温度控制输出功率。之后对应用该控制系统的激光泵浦源样机进行参数测定。激光泵浦源样机的输出光功率可达600mW，中心波长为975.2nm，，在输出激光150mW功率条件下，短期光功率稳定度为±0.008dB，在输出光功率为400mW的条件下，长期光功率稳定度为±0.05dB。本文的独特性工作包括： 1.根据EDFA对激光泵浦源的实际要求，将半导体驱动技术与温度控制集合在一个控制系统中，具有较强的实用性； 2.合理设计了激光泵浦源控制系统驱动与温控单元的电路结构，所制作的控制系统具有较高的驱动稳定度与较强的温度控制能力； 3.综合考量了激光泵浦模块的实际要求，后期通过简单调整，就可以控制相同封装结构、不同型号的泵浦模块，具有一定的普适性。与市场同类产品相比，应用了此控制系统的激光泵浦源样机，具有较高的输出激光稳定度，基本达到了市场中高端产品的水平，表明所设计的激光泵浦源控制系统具有较强的控制能力。说明了本文所设计制作的600mW激光泵浦源控制系统能够满足设计要求，具有一定的实用价值。
[Abstract]:With the development of optical fiber communication technology in recent years, Erbium-Doped Fiber Amplifier (EDFA) is widely used. In order to meet the demand of EDFA for high power and high stability laser pumping source, a 600MW laser pump source control system is designed and fabricated in this paper. The control system integrates semiconductor driving and temperature control functions, and takes the laser pump module which is commonly used in the market as the application object. The circuit of the control system is designed by matching the parameters of the pump module, and finally a complete laser pump source is formed. The pump module is a kind of butterfly device which encapsulates high power laser diode (LD) and semiconductor cooler (TEC). In this paper, the driving unit of the laser pump source control system is designed based on the constant current excitation principle, and then the temperature control unit of the control system is designed by using TEC as the temperature control method of the laser pump source. Then, the electrical experiments on the drive and temperature control unit of the control system are carried out respectively, including the stability test of driving current, the simulation experiment of driving unit, the temperature control ability experiment of temperature control unit and so on. Finally, a complete prototype of the laser pump source is made by selecting a pump module, and its laser output is tested and studied in detail, including the experiment of the relationship between the output power and the driving current. Experimental study of output optical power stability and measurement of laser spectrum. The experimental results show that the output current range of the drive unit of the laser pump control system is 0-1A. Under the condition of 0.6 A output current, the output current has the short-term stability of 1 hour of 508ppm and the long term stability of 8 hours of 1448ppm. The temperature control unit of the laser pump source control system has a maximum output power of 10 W. Then the parameters of the laser pump source prototype using the control system are measured. The output optical power of the laser pump prototype can reach 600mW and the center wavelength is 975.2nmg. the short-term optical power stability is 卤0.008dBunder the output laser power of 150mW, and the long-term optical power stability is 卤0.05dB at the output optical power of 400MW. The unique work of this paper includes: 1. According to the practical requirement of EDFA to laser pump source, the semiconductor driving technology and temperature control are assembled in one control system, which has strong practicability. 2. The circuit structure of the drive and temperature control unit of the laser pump source control system is designed reasonably. The control system has high driving stability and strong temperature control ability. 3. The practical requirement of laser pump module is considered synthetically. After simple adjustment, the same encapsulation structure can be controlled, and the pump module of different models has a certain universality. Compared with the similar products in the market, the laser pump source prototype with this control system has higher output laser stability and reaches the level of high-end products in the market. It is shown that the designed laser pump source control system has strong control ability. It is shown that the 600MW laser pump source control system designed in this paper can meet the design requirements and has certain practical value.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.11;TN722

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