Angular filtering by volume Bragg grating in photothermorefractive glass for nanosecond laser pulse

Baoxing Xiong; Fan Gao; Xiang Zhang; Xiao Yuan

doi:doi:10.3788/COL201917.040501

Chinese Optics Letters, 2019, 17 (4): 040501, Published Online: Apr. 3, 2019

Angular filtering by volume Bragg grating in photothermorefractive glass for nanosecond laser pulse Download： 974次

Baoxing Xiong ^1,2,3Fan Gao ^1,2,3Xiang Zhang ^1,2,3,*Xiao Yuan ^1,2,3

Author Affiliations

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

² Jiangsu Provincial Key Laboratory of Advanced Optical Manufacturing Technologies and Key Laboratory of Modern Optical Technologies of the Ministry of Education, Suzhou 215006, China

³ Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China

Figures & Tables

Fig. 1. (a) Schematic diagram of the experiment on an angular filter for an ns pulse laser. (b) The structural schematic diagram of a 2D angular filter.

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Fig. 2. Stimulated angular selectivity of two VBGs.

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Fig. 3. Near-field distribution of the (a) modulated beam and (b) filtered beam through the angular filter.

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Fig. 4. PSD curves of the modulated and filtered beams in (a) the $x$ direction and (b) the $y$ direction.

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Table1. Parameters of the VBGs Used in the Experiment

	VBG-I	VBG-II
Central wavelength	1053 nm
Period	2.50 μm	3.49 μm
Thickness	3.54 mm
Tilt angle	$- 0.16 °$	0.14°
Bragg angle	11.9°	8.9°

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Table2. Results of M and C

	Modulated Beam	Filtered Beam
$M$	1.954	1.115
$C$	38.5%	8.6%

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Baoxing Xiong, Fan Gao, Xiang Zhang, Xiao Yuan. Angular filtering by volume Bragg grating in photothermorefractive glass for nanosecond laser pulse[J]. Chinese Optics Letters, 2019, 17(4): 040501.

Angular filtering by volume Bragg grating in photothermorefractive glass for nanosecond laser pulse Download： 974次

Fig. 1. (a) Schematic diagram of the experiment on an angular filter for an ns pulse laser. (b) The structural schematic diagram of a 2D angular filter.

Fig. 2. Stimulated angular selectivity of two VBGs.

Fig. 3. Near-field distribution of the (a) modulated beam and (b) filtered beam through the angular filter.

Fig. 4. PSD curves of the modulated and filtered beams in (a) the $x$ direction and (b) the $y$ direction.

Table1. Parameters of the VBGs Used in the Experiment

Table2. Results of M and C

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Angular filtering by volume Bragg grating in photothermorefractive glass for nanosecond laser pulse Download： 974次

Fig. 1. (a) Schematic diagram of the experiment on an angular filter for an ns pulse laser. (b) The structural schematic diagram of a 2D angular filter.

Fig. 2. Stimulated angular selectivity of two VBGs.

Fig. 3. Near-field distribution of the (a) modulated beam and (b) filtered beam through the angular filter.

Fig. 4. PSD curves of the modulated and filtered beams in (a) the x direction and (b) the y direction.

Table1. Parameters of the VBGs Used in the Experiment

Table2. Results of M and C

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Fig. 4. PSD curves of the modulated and filtered beams in (a) the $x$ direction and (b) the $y$ direction.