基于双波长和3×3光纤耦合器的干涉测量相位解卷绕方法  

Phase Unwrapping Method Based on Dual Wavelength and 3×3 Fiber Coupler with Interferometric Measurement

作　　者：张冰[1] 王葵如[1] 颜玢玢[1] 周红仙 王毅 余重秀[1] 苑金辉[1] 桑新柱[1] Zhang Bing;Wang Kuiru;Yan Binbin;Zhou Hongxian;Wang Yi;Yu Chongxiu;Yuan Jinhui;Sang Xinzhu(State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China;School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao, Hebei 066004, China)

机构地区：[1]北京邮电大学信息光子学与光通信国家重点实验室,北京100876 [2]东北大学秦皇岛分校控制工程学院,河北秦皇岛066004

出　　处：《光学学报》2018年第4期224-231,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61275214;61475023);河北省自然科学基金(A2015501065)

摘　　要：将3×3光纤耦合器相位解调和数字全息中的双波长相位测量方法相结合,提出了一种适合于相位型光纤传感器并能进行大范围相位测量的相位解卷绕方法。通过利用合成波长的解卷绕相位对单一波长的卷绕相位进行补偿,得到大范围、无差错的相位变化信息。建立了基于1310nm和1550nm的双波长光纤迈克耳孙干涉系统,对压电位移台所产生的大范围振动进行测量,验证了该方法的可行性和有效性。与1310nm单一波长的相位解调结果相比,该方法可使测量的光程差扩大到原来的6.5倍。A phase unwrapping method for phase-type optical fiber sensors and large-scale phase measurement is proposed,which combines the phase demodulation of 3×3 fiber coupler and the dual-wavelength phase measurement method in digital holography.The unwrapped phase of the synthesized wavelength is used to compensate the wrapped phase of the single wavelength.And the wide-range,error-free phase change information is obtained.The optical fiber Michelson interferometry system based on dual-wavelength of 1310 nm and 1550 nm is established.The large range vibration generated by the piezoelectric displacement platform is measured.And the feasibility and validity of this method are verified.Compared with the phase demodulated result of the 1310 nm single wavelength,the proposed method can make the measured optical path difference expand to 6.5 times.

关 键 词：测量 相位解卷绕 双波长相位检测 3×3光纤耦合器 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置] TH744[自动化与计算机技术—控制科学与工程]