Acta Optica Sinica, Volume. 41, Issue 10, 1009001(2021)
Suppression of High Order Diffraction in Holographic Wave-Front Sensor
A holographic wave-front sensor (HWFS) is a modal wave-front sensor, which utilizes a multi-mode composite holographic element and a position sensitive photodetector to extract the amplitudes of specific Zernike modes from the incident light. However, disturbing light from high order diffraction of the multi-mode composite holographic element is inevitable. The disturbing light disperses the power of the incident light and decreases the signal-to-noise ratio of the sensor. Here, an intensity modulation method is introduced to eliminate the interference light generated by the diffraction of binary phase holographic elements. The proposed method can be used for the elimination of interference light in the holographic mode wavefront sensor, and it is suitable to other applications based on binary phase holographic elements, such as holographic imaging, phase-stepping interferometers, and beam deflectors.
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Jingxin Cheng, Haibo Yang, Man Li, Na Xie. Suppression of High Order Diffraction in Holographic Wave-Front Sensor[J]. Acta Optica Sinica, 2021, 41(10): 1009001
Category: Holography
Received: Sep. 16, 2020
Accepted: Dec. 8, 2020
Published Online: May. 8, 2021
The Author Email: Cheng Jingxin (chengjx163@163.com)