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Characterization of Nonparaxial Truncated Cosine-Gaussian Beams and the Beam Quality in the Far Field |
| KANG Xiao-Ping1,2;Lü Bai-Da1 |
| 1Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064
2Department of Physics, Qiong Zhou University, Wuzhishan 572200 |
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| Cite this article: |
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KANG Xiao-Ping, Lü Bai-Da 2006 Chin. Phys. Lett. 23 2430-2433 |
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Abstract The analytical expression characterizing the propagation of nonparaxial truncated cosine-Gaussian (CoG) beams in free space is derived, and some special cases are discussed. The extended power in the bucket (PIB) is proposed to characterize the beam quality of nonparaxial truncated beams in the far field. It is shown that the extended PIB is applicable to nonparaxial truncated beams, and the PIB of nonparaxial truncated CoG beams depends on the decentred parameter, waist-width-to-wavelength ratio, truncation parameter, and bucket size chosen.
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| Keywords:
41.85.Ew
42.60.Jf
42.25.Bs
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Published: 01 September 2006
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| PACS: |
41.85.Ew
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(Particle beam profile, beam intensity)
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42.60.Jf
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(Beam characteristics: profile, intensity, and power; spatial pattern formation)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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