Characterizing errors of integrated optical phase-shifting interferometer by P2VM method

Menghua Niu; Xinchen Deng; Xinyue Liu; Haoran Meng; Shiyong Wang; Kejiang Zhou; Gang Chen; Yinlei Hao

doi:10.1117/12.2607109

24 November 2021 Characterizing errors of integrated optical phase-shifting interferometer by P2VM method

Menghua Niu, Xinchen Deng, Xinyue Liu, Haoran Meng, Shiyong Wang, Kejiang Zhou, Gang Chen, Yinlei Hao

Proceedings Volume 12069, AOPC 2021: Novel Technologies and Instruments for Astronomical Multi-Band Observations; 120691G (2021) https://doi.org/10.1117/12.2607109
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

Integrated optical phase-shifting interferometer is one of key devices that are frequently employed in astronomical interference instruments to measure complex coherent function of celestial object at certain spatial frequency, and further to achieve high-resolution imaging by synthetic aperture technology in last decades. Due to the presence of device fabrication error, calibration of an interferometer is indispensable, Pixel-to-Visibility Matrix (P2VM) method being a conventional approach. Up to present days, the P2VM is employed as a “all-in-one” method, which unify all device errors into one single matrix. However, characterization of device fabrication error at its various parts is often desired, to provide the basis for device optimization. In the current paper, a process to retrieve fabrication errors of the three main parts of the phase-shift interferometer, from an experimentally measured Pixel-to-Visibility Matrix (V2PM) is demonstrated. The results are expected to be useful in the process of optimizing the device structure and its manufacturing parameters.

Citation Download Citation

Menghua Niu, Xinchen Deng, Xinyue Liu, Haoran Meng, Shiyong Wang, Kejiang Zhou, Gang Chen, and Yinlei Hao "Characterizing errors of integrated optical phase-shifting interferometer by P2VM method", Proc. SPIE 12069, AOPC 2021: Novel Technologies and Instruments for Astronomical Multi-Band Observations, 120691G (24 November 2021); https://doi.org/10.1117/12.2607109

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KEYWORDS

Interferometers

Integrated optics

Phase shifts

Interferometry

Telescopes

Visibility

Waveguides

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