A single collimating lens based dual-beam exposure system for fabricating long-period grating

Le, Vunam; Wu, Guanhao; Zeng, Lijiang

doi:10.1016/j.optcom.2019.125139

Cited by 6 publications

(1 citation statement)

References 17 publications

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“…The critical angle is the maximum incident angle that satisfies the retro-reflective properties of the corner cube. In this study, a transmission grating with an effective aperture of 50 mm was specifically designed and fabricated by a dual-beam exposure system [ 22 ]. The spacing error of the entire grating surface is better than 0.03 g, and the diffraction efficiency of the one-dimensional grating is ≈ 26%.…”

Section: Experimental Setup and Principlementioning

confidence: 99%

Grating-Corner-Cube-Based Roll Angle Sensor

Zhou

et al. 2020

Sensors

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This paper presents a specifically designed grating-corner-cube sensor for precise roll angle measurements. Owing to the diffraction characteristics of the transmission grating and reflection characteristics of the corner cube, two spatially separated parallel beams are naturally constructed. Through differential detection of the positions of two parallel beams, we experimentally demonstrate the possibility of a precise roll angle measurement at a high refresh rate. A performance evaluation of the proposed technique indicates a stability of 0.46 arcsec over 5 min. Compared with a commercial autocollimator over a range of 500 arcsec, the residuals are maintained within ±2 arcsec with a standard deviation of 1.37 arcsec. Furthermore, a resolution of 0.8 arcsec can be achieved using the proposed method. The developed compact roll angle sensor has potential applications in academic and industrial fields.

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Section: Experimental Setup and Principlementioning

confidence: 99%

Grating-Corner-Cube-Based Roll Angle Sensor

Zhou

et al. 2020

Sensors

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Analysis of wavefront aberration in a single collimating lens based dual-beam exposure system

Zeng

2020

14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020)

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Dispersion correction in the advanced volume holographic filter

McCaffrey¹,

Alcaraz²,

Blanche³

2022

Opt. Express

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Thick volume Bragg gratings (VBG) have been used for wavefront selectivity in various applications such as data storage, endoscopy, or astronomic observation. However, a single thick grating is also selective in wavelength, severely limiting the spectral throughput of the system. Recently, our group introduced a two element Advanced Volume Holographic Filter (AVHF) where the first, dispersive Bragg grating is coupled to a thick VBG such that it dramatically improves the spectral bandwidth, and ultimately enhances the signal to noise ratio of polychromatic sources. Still, the two grating AVHF configuration introduced wavelength dispersion which prevents usage of the filter in imaging systems. Here, we present a solution to this problem by introducing a third diffraction grating that compensates for the dispersion of the two initial gratings. Using both simulation and experimental implementation of a visible-based, broadband AVHF system, the spectral dispersion was improved by a factor of up to 41 × compared to our previous system, re-collimating the output filtered beam. This new AVHF system can be utilized in imaging applications with noisy environments requiring filtration of a polychromatic source.

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A single collimating lens based dual-beam exposure system for fabricating long-period grating

Cited by 6 publications

References 17 publications

Grating-Corner-Cube-Based Roll Angle Sensor

Grating-Corner-Cube-Based Roll Angle Sensor

Analysis of wavefront aberration in a single collimating lens based dual-beam exposure system

Dispersion correction in the advanced volume holographic filter

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