Ce Yang, Hongpan Peng, Meng Chen, Ning Ma, Yaoyao Xue, Xinbiao Du, Xie Zhang. Depolarization mechanism and compensation scheme of radially polarized beams[J]. Infrared and Laser Engineering, 2021, 50(3): 20200038
- Infrared and Laser Engineering
- Vol. 50, Issue 3, 20200038 (2021)
Fig. 1. Axis orientations of the Nd:YAG crystal rod
Fig. 2. (a) Temperature distribution and (b) heat load distribution in a three-fold laser diode array pumped Nd:YAG crystal rod, which were simulated by the finite element analysis method
Fig. 3. (a) Positive stress σr , (b) positive stress σφ and (c) the shear stress τrφ on the cross section of crystal rod under non-uniform pumping, which were simulated by the finite element analysis method
Fig. 4. Comparative analysis of thermally induced birefringence of radially and linearly polarized beams under different pumping current
Fig. 5. Optical path schematic diagram of depolarization degree evaluation for the radially polarized beams under non-uniform pumping
Fig. 6. Comparison of the depolarization degrees of the two types of polarized beams under different pumping current
Fig. 7. Schematic diagram of measuring the purity of radially polarized beams by slit method
Fig. 8. Schematic diagram of radially polarized beam depolarization compensation, in which the insets (a), (b), (c) are the profiles detected at the points of a , b , and c by CCD
Fig. 9. (a) Compensation results of radially polarized beams depolarization; (b) Amplified power of radially polarized beams
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Table 1. [in Chinese]
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Table 2. [in Chinese]
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Table 3. [in Chinese]
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Table 4. [in Chinese]
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