Beam combination setup for dual-frequency laser with orthogonal linear polarization

Haijin Fu; Jiubin Tan; Pengcheng Hu; Zhigang Fan

doi:10.3788/COL201513.101201

Journals >Chinese Optics Letters >Volume 13 >Issue 10 >Page 101201 > Article

Chinese Optics Letters
Vol. 13, Issue 10, 101201 (2015)

Beam combination setup for dual-frequency laser with orthogonal linear polarization

Haijin Fu^1、2, Jiubin Tan¹, Pengcheng Hu^1、*, and Zhigang Fan²

Author Affiliations

¹Ultra-Precision Optoelectronic Instrument Engineering Center, Harbin Institute of Technology, Harbin 150001, China

²Postdoctoral Research Station of Optical Engineering, Harbin Institute of Technology, Harbin 150001, China

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DOI: 10.3788/COL201513.101201 Cite this Article Set citation alerts

Haijin Fu, Jiubin Tan, Pengcheng Hu, Zhigang Fan. Beam combination setup for dual-frequency laser with orthogonal linear polarization[J]. Chinese Optics Letters, 2015, 13(10): 101201 Copy Citation Text

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Schematic diagram of a typical dual-frequency laser source based on acousto-optic modulation technology. FSC, frequency stabilization circuit; HW, half-wave plate.

Fig. 1. Schematic diagram of a typical dual-frequency laser source based on acousto-optic modulation technology. FSC, frequency stabilization circuit; HW, half-wave plate.

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Fig. 2. Reflectivity curves of a PBS.

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Fig. 3. Beam combination with a single PBS.

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Fig. 4. Beam combination with two orthogonal PBSs.

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Fig. 5. Polarization state of a dual-frequency laser beam.

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Fig. 6. Experimental system for polarization measurement of a dual-frequency laser beam.

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Fig. 7. Normalized beat amplitude for (a) the conventional setup and (b) the improved setup.

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Fig. 8. Transmission laser intensity of PBS1 vs. angle error between polarizing axes of the two PBSs.

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$P_{1}$	$V_{1}$	$P_{2}$	$V_{2}$	$ρ_{1} / \deg$	$ρ_{2} / \deg$	$β / \deg$
0.9990	0.0055	0.9527	0.0791	0.162	2.325	1.362
0.9970	0.0047	0.9630	0.0668	0.137	1.954	0.995
0.9980	0.0050	0.9626	0.0799	0.146	2.338	1.036
1.0000	0.0063	0.9483	0.0821	0.185	2.417	1.522
0.9990	0.0053	0.9602	0.0675	0.155	1.976	1.136

Table 1. Extreme Values of Beat Amplitude and the Calculated Polarization Parameters (for conventional setup)

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$P_{1}$	$V_{1}$	$P_{2}$	$V_{2}$	$ρ_{1} / \deg$	$ρ_{2} / \deg$	$β / \deg$
0.9999	0.0053	0.9966	0.0047	0.152	0.135	0.095
0.9995	0.0045	0.9949	0.0049	0.129	0.141	0.132
1.0000	0.0047	0.9961	0.0058	0.135	0.167	0.112
0.9990	0.0061	0.9960	0.0047	0.175	0.135	0.086
0.9985	0.0063	0.9942	0.0056	0.181	0.154	0.124

Table 2. Extreme Values of Beat Amplitude and the Calculated Polarization Parameters (for improved setup)

Haijin Fu, Jiubin Tan, Pengcheng Hu, Zhigang Fan. Beam combination setup for dual-frequency laser with orthogonal linear polarization[J]. Chinese Optics Letters, 2015, 13(10): 101201

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