中国激光, 2017, 44 (4): 0401003, 网络出版: 2017-04-10
激光陀螺反射镜最佳透射率实验研究
Experimental Study on Optimal Transmittance of Mirror in Laser Gyro
激光物理 激光陀螺 信噪比 最佳透射率 输出光功率 laser optics laser gyro signal-noise ratio optimal transmittance output optical power
摘要
通过检测与计数电路可以将激光陀螺输出的光电信号进行放大、整形、鉴相, 输出与陀螺转角成正比的脉冲信号。由于激光陀螺输出的是微弱光电信号, 且检测电路存在散粒噪声和热噪声等干扰, 因此提高检测电路信噪比对保障计数电路功能正常来说至关重要。为提高检测电路信噪比, 需保证陀螺输出光功率尽可能大。根据激光器的功率输出公式推导计算了使陀螺输出光功率最大的反射镜最佳透射率, 并进行了实验验证。理论计算和实验结果均表明, 采用最佳透射率反射镜能够有效提高激光陀螺输出光功率。
Abstract
By detecting and counting the circuit, the photoelectric signal of laser gyro is amplified, shaped and the phase of it is discriminated. The pulse that are signals proportional to the rotating angle of gyro are obtained. Since the output signals of gyro are weak photoelectric ones, and shot noise and thermal noise disturbances exist in the detecting circuit, it is crucial to improve signal-noise ratio to ensure normal function of the counting circuit. To improve the signal-noise ratio of the detecting circuit, we have to guarantee that the output optical power is as large as possible. The optimal transmission of mirror for optimal optical power is derived and calculated according to the power formula of laser gyro, and experiments are followed to verify it. Both theoretical calculation and experimental results prove that, by using optimal transmittance, the output optical power of the mirror can be effectively improved.
梁可, 李龙, 陈林峰, 于文东, 韩宗虎, 张伟, 傅鑫. 激光陀螺反射镜最佳透射率实验研究[J]. 中国激光, 2017, 44(4): 0401003. Liang Ke, Li Long, Chen Linfeng, Yu Wendong, Han Zonghu, Zhang Wei, Fu Xin. Experimental Study on Optimal Transmittance of Mirror in Laser Gyro[J]. Chinese Journal of Lasers, 2017, 44(4): 0401003.