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高精度的激光雷达探测对发射波长的精确定标和稳定有极其严格的要求,可调谐激光器进行多次波长调节时存在的激光器空回问题会严重影响系统的探测精度。为此,提出了一种解决可调谐激光器空回问题的算法,得出了通过来回跳转使正负误差相抵消以消除空回误差的方法,并首先将其应用到大气CO2浓度垂直廓线高精度探测中的稳频部分。通过多次实验表明,该算法提高了可调谐激光器的激光波长调节精度,消除了激光器多次反转调节波长时空回误差对测量精度的影响,弥补了机械转动进行波长调节的不足,对高光谱激光技术的发展有十分重要的意义。
High-precision laser radar detection has extremely strict requirements on the accurate calibration and stabilization of the emission wavelength. The problem of lasing vacancy during the tunable laser with multiple wavelength adjustment will seriously affect the detection accuracy of the system. For this reason, an algorithm to solve the problem of tunable lasers is proposed, and the method of eliminating the error of null-return errors by canceling the positive and negative errors by jumping back and forth is derived. The method is first applied to the vertical profile of atmospheric CO2 concentration High-precision detection of the frequency stability part. The experimental results show that this algorithm improves the laser wavelength adjustment accuracy of the tunable laser and eliminates the influence of the space-time error caused by the multiple inversion of the laser on the measurement accuracy, compensates for the lack of wavelength adjustment of the mechanical rotation, The development of laser technology is of great significance.