Dynamic phase retrieval method for ultrafast and precise vibration sensing based on time stretching

Author:

Chang Zhenghu,Cao YulongORCID,Huang Jingsheng,Wu Qiang,Liu Ai,Gao Lei,Zhu Tao

Abstract

We demonstrate a method for retrieving the phase information from single-shot interference spectra obtained by dispersive Fourier transform, through which the error accumulation during phase retrieval is restrained. A Mach–Zehnder interferometer is proposed for vibration sensing with high speed. We find that relative phase trends at different time delays can be precisely retrieved to improve the signal-to-noise ratio when the time interval jitter between pulses within two arms is less than four times the pulse width. The verification experiment achieves a phase resolution of 5.3 mrad and a high-speed refresh frame rate of 51.8 MHz. Numerical simulations and experiments show that the method is effective for phase demodulation of dynamic interference spectra, and provides a reliable strategy for high-speed, precision sensing.

Funder

National Science Fund for Distinguished Young Scholars

National Natural Science Foundation of China

Graduate Research and Innovation Foundation of Chongqing, China

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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