机载大功率半导体激光信标系统设计  

Airborne beacon system design of high-power semiconductor laser

作　　者：涂遗[1] 罗向前[1] 金亮[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《应用光学》2012年第6期1161-1167,共7页Journal of Applied Optics

摘　　要：为配合地面探测跟踪系统对飞行目标的探测,设计了一种以40W紧凑型半导体激光器为光源、具有一定发散角的机载式单色信标系统。由于系统要满足机载平台加装体积小、质量轻、散热好的要求,设计了一体成型的鳍片式壳体结构,解决系统散热问题的同时,控制了整体质量。为实现在有限体积内,40W单阵列光纤耦合半导体激光器模块所需的60A大电流恒流驱动,采用叠相调制技术和同步BUCK变换电路结构;为解决激光器在高空低温环境下输出光功率和中心波长能够稳定控制的难题,设计了数模混合双向温控系统。利用ZEMAX软件设计了双凹透镜组结构的扩束装置,实现了对激光发散角的发散和可调节。通过环境考核测试,系统在0℃～15℃的低温环境下,输出光功率稳定度和波长控制精度均能满足要求。In order to coordinate with the ground detection tracking system for detecting the flight target, we designed an air-based monochromatic beacon system. A 40W high-power sem- iconductor laser is used as the light source of the system, which has a certain beam divergence. As the beacon system should meet the requirements of smaller in size, lighter in weight and faster in heat dissipating to fit the air-platform, we designed the aluminum shell as fin chip in one-piece for laser, which helped solve the heat dissipation problem and reduce the system weight. To achieve the 60A high constant current, we need to drive the 40W semiconductor la- ser module in the limited room, the principle of diphase overlay synchronous and buck trans- formation circuit structure is adopted. To make the laser output power and central wavelength stable in high altitude, we designed the temperature control system with digital and analog hy- brid for heating or cooling. The ZEMAX is used to design the structure of the beam expander device with double-concave lens group, which can regulate the angle of divergence of the light beam. By conducting the environmental assessment and test, we proved that in the 0℃ -15 ℃ environment, the stability of the output power and the control precision of the central wave- length could meet the requirements.

关 键 词：半导体激光器 单色信标 驱动电路 激光扩束装置 

分 类 号：TN248[电子电信—物理电子学]