光学学报, 2014, 34 (s1): s106011, 网络出版: 2014-08-12
自适应光纤准直器的谐振特性优化研究
Optimal Research of Resonance Characteristic of Adaptive Fiber-Optics Collimator
光纤光学 自适应光学 自适应光纤准直器 谐振特性 双二阶数字滤波器 fiber optics adaptive optics adaptive fiber-optics collimator resonance characteristic biquad digital filter
摘要
自适应光纤准直器(AFOC)是一种快速、高精度调节出射准直激光束方向的新型无源光纤器件。随着其应用范围的拓展,对AFOC的谐振特性提出了更高的要求。对阶梯型减振结构改善AFOC谐振特性的方法进行了实验研究,结果表明该结构能提高AFOC的一阶谐振频率并减小谐振峰谷值。在此基础上,理论并实验研究了利用双二阶数字滤波器技术提高AFOC可用带宽的方法,实验结果表明,该方法有效地抵消了一阶谐振峰,将AFOC的可用带宽从约1.3 kHz提升至2.5 kHz。
Abstract
The adaptive fiber-optics collimator (AFOC) is a kind of passive fiber-optics device with the capability of fast and precise tip-tilt deviation control of collimated output. With the rapid extension of its application areas, the AFOC with greater resonance characteristic is needed. A method of using step-profile damping structure to improve the resonance characteristic of AFOC is experimentally studied, and the results reveal that the first-order resonance frequency increases with the reduction of the first-order resonance peak. On this basis, a way to enhance the available bandwidth of AFOC is studied theoretically and experimentally based on the biquad digital filter technique. Experimental results show that the first-order resonance peak of AFOC is suppressed efficiently and the usable operation bandwidth increases from about 1.3 kHz to 2.5 kHz.
刘红梅, 耿超, 罗文, 王彩霞, 李新阳. 自适应光纤准直器的谐振特性优化研究[J]. 光学学报, 2014, 34(s1): s106011. Liu Hongmei, Geng Chao, Luo Wen, Wang Caixia, Li Xinyang. Optimal Research of Resonance Characteristic of Adaptive Fiber-Optics Collimator[J]. Acta Optica Sinica, 2014, 34(s1): s106011.