Chinese Optics, Volume. 17, Issue 5, 1068(2024)
Study on beam quality of DF laser with inner cavity unstable resonator
Fig. 1. Schematic diagram of positive branch virtual confocal unstable resonator
Fig. 3. Schematic diagram of convex mirror installation structure. (a) Longitudinal support structure; (b) transverse support structure
Fig. 4. Near field laser energy under two types of supporting structures
Fig. 5. Near field laser spots for (a) longitudinal support structure and (b) transverse support structure
Fig. 6. Far field divergence angles under different magnifications
Table 1. Structural parameters of three sets of positive branch virtual confocal unstable resonator with different magnifications
View tableView in ArticleTable 1. Structural parameters of three sets of positive branch virtual confocal unstable resonator with different magnifications
M R 1 / mm R 2 / mm D /mm d /mm L /mm 1.65 10727.5 − 6501.5 50 30.2 2113 1.85 9197.8 − 4971.9 50 26.9 2113 2.25 7606.8 − 3380.8 50 22.2 2113
Table 2. Theoretical divergence angles for different
M View tableView in ArticleTable 2. Theoretical divergence angles for different
M M 1.65 1.85 2.25 θ/ mrad 0.4931 0.4544 0.3451
Table 3. Beam quality factor
β dataView tableView in ArticleTable 3. Beam quality factor
β dataM β Transverse support Longitudinal support 1.65 2.05 2.25 1.85 1.98 2.18 2.25 1.83 2.00
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Peng RUAN, Yu-hai WANG, Qi-kun PAN, Chun-lei SHAO, Fei CHEN, Jin GUO. Study on beam quality of DF laser with inner cavity unstable resonator[J]. Chinese Optics, 2024, 17(5): 1068
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Received: Nov. 24, 2023
Accepted: --
Published Online: Dec. 31, 2024
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