Frequency locking of diode-pumped Nd:YAG lasers with the digital PID method at 532-nm iodine lines in incoherent wind lidar
Frequency locking of diode-pumped Nd:YAG lasers with the digital PID method at 532-nm iodine lines in incoherent wind lidar
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DOI：
10.1117/12.466460
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发表时间：
2003-03
期刊：
影响因子：
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通讯作者：
Songhua Wu;Dapeng Sun;Zhishen Liu
中科院分区：
文献类型：
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作者：
Songhua Wu;Dapeng Sun;Zhishen Liu
在我们的新型紧凑型 DDWL（直接探测风激光雷达）中，我们使用 CrystaLaser 型号 IRCL-100-1064S 激光器作为播种器，其内部具有热频率执行器。鉴于外部频率执行器只能实现绿光辐射稳定性，且技术复杂、应用困难，这里我们介绍一种更简单的方法——将改进的数字PID算法应用于紧凑型商用CrystaLaser激光器中的伺服系统。 PID 算法甚至可以简化最困难的低温系统的调节。 PID 控制器可以预测负载动作，为激光频率稳定提供更接近的温度稳定性。在为过程设置所需的锁定点后，控制器使用改进的数字 PID 算法计算输出，并将输出反馈到激光器的热致动器中，从而使激光器在任意长的时间内以优于 1 MHz 的中心激光频率稳定水平锁定到碘线。
In our new compact DDWL (direct-detect wind lidar), we use a CrystaLaser model IRCL-100-1064S laser as a seeder, which has a thermal frequency actuator inside. Given that the external frequency actuator can only achieve green radiation stability and are technically complicated and difficult of application, here we describe a simpler method-applying improved digital PID algorithm to a servo in the compact commercial CrystaLaser laser. A PID algorithm simplifies regulation of even the most difficult cryogenic systems. The PID controller can anticipate the load action to provide closer temperature stability for the laser frequency stabilization. After setting the desired locking point to the process, the controller calculates the output with improved digital PID algorithm, and the output is fed back into the thermal actuator of the laser, which keep the laser locked to the iodine line at a central laser frequency stability level of better than 1 MHz for arbitrarily long periods.