Measurement of the coherence of multi-transverse-mode optical field based on liquid crystal spatial light modulator

Hongmiao Zhao; Kun Xie; Qiong Zhou; Wenguang Liu

doi:10.1117/12.2506165

15 November 2018 Measurement of the coherence of multi-transverse-mode optical field based on liquid crystal spatial light modulator

Hongmiao Zhao, Kun Xie, Qiong Zhou, Wenguang Liu

Author Affiliations +

Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 109644P (2018) https://doi.org/10.1117/12.2506165
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

In this paper, the fast measurement of the coherence of the multi-transverse-mode optical field is realized by using the intensity type of liquid crystal spatial light modulator (LC-SLM). Using the characteristic and advantage of the LC-SLM which can change the location of the light hole quickly and easily, and basing on the method of dual-hole interference, we divided the 650nm multi-transverse-modes laser spot into 4×4 points, and performed a quick scan with pairs of double holes of diameter 150μm. The contrast ratio of the interference patterns is computed by a self-made image processing software, and the coherence degree between the two points can be obtained. The experimental results show that the measurement system can accurately measure the coherence of multi-transverse-mode optical field within 10 seconds, which providing guideline for the further mode decomposition and beam control of multi-transverse-mode optical field.

Citation Download Citation

Hongmiao Zhao, Kun Xie, Qiong Zhou, and Wenguang Liu "Measurement of the coherence of multi-transverse-mode optical field based on liquid crystal spatial light modulator", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109644P (15 November 2018); https://doi.org/10.1117/12.2506165

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KEYWORDS

Coherence (optics)

Charge-coupled devices

Spatial light modulators

Liquid crystals

Light sources

Modulation

Beam controllers

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