光学学报, 2018, 38 (4): 0412004, 网络出版: 2018-07-10
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 
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Phase Unwrapping Method Based on Dual Wavelength and 3×3 Fiber Coupler with Interferometric Measurement
测量 相位解卷绕 双波长相位检测 3×3光纤耦合器; measurement phase unwrapping dual-wavelength phase detection 3×3 fiber coupler;
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1310 nm和1550 nm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1310 nm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。
Abstract
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.
张冰, 王葵如, 颜玢玢, 周红仙, 王毅, 余重秀, 苑金辉, 桑新柱. 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[J]. 光学学报, 2018, 38(4): 0412004. Bing Zhang, Kuiru Wang, Binbin Yan, Hongxian Zhou, Yi Wang, Chongxiu Yu, Jinhui Yuan, Xinzhu Sang. Phase Unwrapping Method Based on Dual Wavelength and 3×3 Fiber Coupler with Interferometric Measurement[J]. Acta Optica Sinica, 2018, 38(4): 0412004.
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