Abstract

Heterodyne interferometry is a powerful tool for achieving high precision and fast measurement. We developed an angle measurement system based on heterodyne interferometry by combining discrete equal-spacing longitudinal modes of optical frequency comb with an acousto-optic modulator. Using a self-designed grating-corner-cube sensor, this method can achieve a two-dimensional angle measurement with sub-arcsecond accuracy and megahertz (MHz) update rate. We experimentally demonstrate a precision of 0.073 arcsec under a 3 MHz update rate, and comparison residuals are kept within 0.063 arcsec over 300 arcsec when compared to a piezo stage. In the dynamic measurement of a 40 Hz frequency, the continuous sinusoidal motion of 0.05 arcsec can be clearly distinguished and reconstructed.

© 2024 Optica Publishing Group

Dual-comb spectroscopy resolved three-degree-of-freedom sensing

Siyu Zhou, Vunam Le, Shilin Xiong, Yuetang Yang, Kai Ni, Qian Zhou, and Guanhao Wu
Photon. Res. 9(2) 243-251 (2021)

Fiber-optic spectrum monitoring of wavelength-division-multiplexed telecommunication signals with MHz update rates

Afsaneh Shoeib, Manuel P. Fernández, Connor Rowe, Reza Maram, Pasquale Ricciardi, and José Azaña
Opt. Lett. 49(5) 1245-1248 (2024)

Absolute angular position measurement by dual-comb spectroscopy of an autocollimation diffracted beam

Siyu Zhou, Ruilin Jiang, Ruixue Zhang, Liheng Shi, Di Zhang, and Guanhao Wu
Opt. Lett. 48(5) 1104-1107 (2023)

Unveiling out-of-loop attosecond timing jitter precision in Ti:sapphire mode-locked lasers with an optical heterodyne technique

Haitao Wu, Hao Xu, and Jianye Zhao
Opt. Lett. 49(3) 742-745 (2024)

Precise selection and amplification of a single comb line from femtosecond mode-locked lasers

Shaozhuang Yao, Yin Xu, Mengcheng Zhang, Xingcan Yan, and Hualong Bao
Opt. Lett. 49(3) 710-713 (2024)