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The propagation of complex-argument laguerre-Gaussian beams

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The propagation of complex-argument Laguerre-Gaussian beams

作者： Hong Ma, baida lü institute of laser physics & chemistry, sichuan university, chengdu 610064, china

The propagation of complex-argument laguerreGaussian (l-G) beams passing through a paraxial optical ABCD system for both unapertured and apertured cases has been studied in detail. The analytical propagation expressions for unapertured case have been derived based on the generalized Huygens-Fresnel diffraction integral. which enable us to calculate the field distribution from one plane to another, For the apertured case numerical calculations are still available. Numerical examples are given to illustrate the propagation properties of complex-argument l-G beams.

关键词： Elegant laguerre-Gaussian beam - propagation equation - unapertured and apertured cases

A comparative study of elegant and standard Hermite-Gaussian beams

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A comparative study of elegant and standard Hermite-Gaussian...

作者： baida lü, Hong Ma institute of laser physics and chemistry, sichuan university, chengdu 610064. china

The closed-form expressions for the propagation of elegant Hermite-Gaussian (H-G) beams passing though a first-order ptical ABCD system are derived by means of which a comparative study of the propagation properties of standard and legant H-G beams is performed. Furthermore. the beam propagation factor and/or power in the bucket (PIB) are chosen as ne criteria for characterizing beam quality, and the beam quality of standard and elegant H-G beams is compared. 2000 Elsevier Science B.V. All rights reserved.

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The beam quality in coherent and incoherent combinations of one-dimensional off-axis Hermite-Gaussian beams

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The beam quality in coherent and incoherent combinations of ...

作者： baida lü, Hong Ma institute of laser physics & laser Technology, sichuan university, chengdu 610064, china

In this paper, the beam propagation factor (i.e., M-factor) and power in the bucket (PIB) are chosen as the criteria for characterizing beam quality. The coherent and incoherent combinations of one-dimensional (ID) off-axis higher-order Hermite-Gaussian beams are studied in detail. Our analytical and numerical results show that the resulting beam quality depends upon the coherent or incoherent combination, the field distribution of combined beams, their mode structure, number, normalized separate distance and geometrical arrangement. Interesting is that. as compared with the fundamental Gaussian beam combination, the coherent beam combination can not always result in the better beam quality.

关键词： Coherent and incoherent beam combinations -off-axis higher-order Hermite-Gaussian beam - beam quality- M~2-factor - power in the bucket (PIB)

General propagation equation of flattened Gaussian beams

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General propagation equation of flattened Gaussian beams

作者： baida lü and Shirong luo institute of laser physics and chemistry. sichuan university. chengdu 610064. china

The closed-form propagation equation of flattened Gaussian beams passing through a paraxial optical ABCD system, in which the linear gain and absorption media are included, is derived, and its general applicable advantage is illustrated with numerical examples. 2000 Optical Society of America [S0740-3232(00)01310-7]OCIS codes: 350.5500, 050.1940, 140.4480.

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Beam propagation factor of hard-edge diffracted cosh-Gaussian beams

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Beam propagation factor of hard-edge diffracted cosh-Gaussia...

作者： baida lü, Shirong luo Department of Opto-Electronics, Science and Technology, institute of laser physics and chemistry, sichuan university, chengdu 610064, china

Based on a generalized truncated second-order irradiance moments definition, an analytical generalized beam propagation factor (M-factor) of hard-edge diffracted cosh-Gaussian beams is derived and illustrated numerically. It is shown that the advantage of the method is its consistency with the previous results. The relevant subjects of truncated beams are also discussed. 2000 Published by Elsevier Science B.V. All rights reserved.

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多级和多程脉冲激光放大器的逆问题

中国激光 1997年第6期24卷 495-500页

作者：张彬吕百达四川大学激光物理与化学研究所

采用脉冲分割模型和逐次逼近迭代法，对任意空间和时间分布波形的激光通过任意增益分布多级和多程激光放大系统传输的逆问题，即给定输出脉冲和多级／多程放大系统参数，求输入脉冲波形和能量密度。

关键词：多级多程脉冲激光放大器逆问题

维普期刊数据库

Beam combination of a radial laser array: Hermite-Gaussian model

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Beam combination of a radial laser array: Hermite-Gaussian m...

作者： baida lü, Hong Ma Deparment of Opto-Electronics. Science and Technology, institute of laser physics and chemistry, sichuan university, chengdu 610064. china

The closed-form beam propagation equations of radial laser array are derived, where the Hermite-Gaussian mode is used to describe the beamlets. Numerical examples are given and illustrated. It is shown that the irradiance distribution of the resulting beam is dependent upon the phase-or nonphase-locked combination, initial field (mode structure) and number of beamlets. array geometry, and fill factor. 2000 Published by Elsevier Science B.V. All rights reserved.

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多段阵列式钕玻璃放大器几何构形的研究

中国激光 1997年第6期24卷 481-485页

作者：冯国英吕百达郑万国四川大学激光物理与化学研究所中国工程物理研究院核物理与化学研究所

基于闪光灯和钕玻璃的实验数据，用光线追迹和蒙特卡罗法建立了多段阵列式钕玻璃放大器（ＭＳＡ）的泵浦模型。

关键词：阵列式放大器钕玻璃光线追迹泵浦

维普期刊数据库

10 ps High Power laser System at 248 nm

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Chinese Journal of lasers 2001年第5期 14-17页

作者： YUAN Xiao 1,2 DING Guilin 1 lIU Jingru 2 lAU¨U baida 1 Julius Goldhar 3 1physics Department, sichuan university, chengdu 610064, china 2Northwest institute of Nuclear Technology, P.O.Box 69 13, Xi’an 710024, china 3

A simple 10 ps KrF laser system consisting of quenched dye laser oscillator pumped by a XeCl laser, a distributed feedback dye laser (DFDl), a three stage dye amplifier and a two stage KrF amplifier are described. The output of the laser system is 140 mJ with 10 ps pulse width by using polarization multiplexing amplification. A focused output laser intensity of about 4×10 15 W/cm 2 is obtained. The saturation fluence for KrF laser is obtained with this laser.

关键词： amplification polarization multiplexing KrF laser