Design of 3D Locking System for Interference Fringes of Holographic Grating

Guolin Qian; Jianhong Wu; Chaoming Li; Juefei Cheng

doi:10.3788/AOS201939.0405001

Acta Optica Sinica, Volume. 39, Issue 4, 0405001(2019)

Design of 3D Locking System for Interference Fringes of Holographic Grating

Guolin Qian^1,2、*, Jianhong Wu^1、*, Chaoming Li¹, and Juefei Cheng²

Author Affiliations

¹ School of Optoelectronic Science and Engineering, Soochow University, Suzhou, Jiangsu 215006, China

² College of Electronic Information Engineering & Engineering Research and Development Center for Photovoltaic Technology of Jiangsu Province, Suzhou Vocational University, Suzhou, Jiangsu 215106, China;

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Figures & Tables(11)

Fig. 1. Configuration of 3D locking system of holographic grating

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Fig. 2. Relative position of reference grating and optical grating

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Fig. 3. Reference interference fringes Ct for detecting period of optical grating

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Fig. 4. Interference fringe formed by grating Gb. (a) Reference interference fringe Cb0; (b) real-time interference fringe Cbs

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Fig. 5. Locking effect of period of real-time interference fringes

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Fig. 6. Interference fringes in holographic exposure system

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Fig. 7. Exposures of interference fringes when phase unlocked and locked. (a)(b) Δt1=30 min; (c)(d) Δt2=30 min; (e)(f) Δt3=30 min; (g)(h) Δt4=30 min

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Table 1. Phase and contrast of exposure fringe when fringe locking system is closed

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Table 1. Phase and contrast of exposure fringe when fringe locking system is closed

Exposure time	Phase				Contrast
Exposure time	${Φ_{A}}_{}$ /λ	${Φ_{B}}_{}$ /λ	${Φ_{C}}_{}$ /λ	${Φ_{D}}_{}$ /λ	ν_A	ν_B	ν_C	ν_D
Δt₁	0.000	0.000	0.000	0.000	0.523	0.481	0.521	0.595
Δt₂	0.082	0.148	0.279	0.311	0.105	0.125	0.158	0.126
Δt₃	-0.328	-0.246	-0.246	-0.131	0.241	0.258	0.273	0.299
Δt₄	-0.607	-0.525	-0.557	-0.393	0.400	0.377	0.368	0.325

Table 2. Phase and contrast of exposure fringe when phase locked

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Table 2. Phase and contrast of exposure fringe when phase locked

Exposure time	Phase				Contrast
Exposure time	${Φ_{A}}_{}$ /λ	${Φ_{B}}_{}$ /λ	${Φ_{C}}_{}$ /λ	${Φ_{D}}_{}$ /λ	ν_A	ν_B	ν_C	ν_D
Δt₁	0.000	0.000	0.000	0.000	0.773	0.825	0.995	0.524
Δt₂	0.016	-0.381	0.000	-0.317	0.899	0.878	0.995	0.873
Δt₃	-0.048	-0.476	0.000	-0.349	0.910	0.947	0.997	0.927
Δt₄	-0.063	-0.476	0.000	-0.302	0.906	0.934	0.997	0.916

Table 3. Phase and contrast of exposure fringe when phase and tilt locked

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Table 3. Phase and contrast of exposure fringe when phase and tilt locked

Exposure time	Phase				Contrast
Exposure time	${Φ_{A}}_{}$ /λ	${Φ_{B}}_{}$ /λ	${Φ_{C}}_{}$ /λ	${Φ_{D}}_{}$ /λ	ν_A	ν_B	ν_C	ν_D
Δt₁	0.000	0.000	0.000	0.000	0.824	0.837	0.994	0.987
Δt₂	0.044	0.044	0.000	0.000	0.927	0.903	0.994	0.988
Δt₃	0.029	0.029	0.000	0.000	0.916	0.926	0.994	0.989
Δt₄	0.029	0.015	0.000	0.000	0.895	0.914	0.992	0.989

Table 4. Phase and contrast of exposure fringe when 3D fringe locked

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Table 4. Phase and contrast of exposure fringe when 3D fringe locked

Exposure time	Phase				Contrast
Exposure time	${Φ_{A}}_{}$ /λ	${Φ_{B}}_{}$ /λ	${Φ_{C}}_{}$ /λ	${Φ_{D}}_{}$ /λ	ν_A	ν_B	ν_C	ν_D
Δt₁	0.000	0.000	0.000	0.000	0.987	0.935	0.993	0.984
Δt₂	0.000	0.025	0.000	0.000	0.986	0.929	0.993	0.984
Δt₃	0.000	0.013	0.000	0.000	0.985	0.926	0.992	0.983
Δt₄	0.000	0.013	0.000	0.000	0.985	0.928	0.993	0.983

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Guolin Qian, Jianhong Wu, Chaoming Li, Juefei Cheng. Design of 3D Locking System for Interference Fringes of Holographic Grating[J]. Acta Optica Sinica, 2019, 39(4): 0405001

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Paper Information

Category: Diffraction and Gratings

Received: Nov. 7, 2018

Accepted: Dec. 25, 2018

Published Online: May. 10, 2019

The Author Email:

DOI:10.3788/AOS201939.0405001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology