| 调制型半导体激光器恒流驱动电路设计 |
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| 引用本文： | 王冬,吕勇.调制型半导体激光器恒流驱动电路设计[J].现代电子技术,2010,33(7):92-94,98. |
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| 作者姓名： | 王冬 吕勇 |
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| 作者单位： | 北京信息科技大学,光电信息与通信工程学院,北京,100192 |
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| 基金项目： | 北京市教委科技发展基金资助项目 |
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| 摘 要： | 半导体激光器驱动电流的微小变化将直接导致其输出光强的波动。为实现半导体激光器的稳定功率输出,基于电压负反馈原理设计了包含软启动和限流保护电路的恒流驱动电路;同时针对为消除背景光的影响而对光源进行调制的需要,设计了包括晶体振荡电路和分频电路的集成激光器调制电路。制作具体电路并完成了相关实验。实验结果表明该电路能够提供高稳定度的驱动电流,电流稳定度达0.05%;软启动和限流保护电路可保护半导体激光器并提高其抗冲击能力。调制电路产生半导体激光器调制所需的载波信号并直接完成输出光调制,通过开关可方便地实现从256 Hz～512 kHz范围内12种常用调制频率的选择。
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| 关 键 词： | 半导体激光器 驱动电路 恒流 调制 |
Design of Modulation Constant Current Driving Circuit for Laser Diode |
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| Affiliation: | WANG Dong,Lü Yong(School of Photoelectronic Information and Communication Engineering,Beijing Information Science and Technology University,Beijing 100192,China) |
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| Abstract: | Small change of driving current can directly affect the output light intensity of the laser diode.In order to obtain stable output,based on the voltage negative feedback principle,a constant current driving circuit is designed which also contains slow turn-on and current limit circuits.The modulation of the light source is needed to eliminate the influence of the background light,therefore an integral modulation circuit for laser diode is designed.The results prove that it can provide high stability driving... |
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| Keywords: | semiconductor laser driving circuit constant current modulation |
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