Simultaneous generation of N coherent pulses of various areas under self-diffraction in87Rb vapors

IF 0.5 4区 物理与天体物理 Q4 OPTICS
Sergey N. Bagaev, Igor B. Mekhov, Igor A. Chekhonin, Mikhail A. Chekhonin
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引用次数: 0

Abstract

Subject of study. The self-diffraction process of a resonant pulse in a dense extended resonant medium was studied for the first time to our knowledge. This process leads to an angular deflection of the output radiation and sequential emission of a large series of N pulses with a variable area in the range (−3π,…,0,…,3π). The pulses are emitted from a small focusing region (0.1–1 mm) of the pump pulse in a dense extended resonant medium. The pulse wavelength corresponds to the resonant transition D287Rb (wavelength 780.24 nm). Aim of study. The nonlinear effect of the self-diffraction of a laser pulse with a cylindrical wavefront is studied in an extended resonant medium of rubidium vapor to develop new resonant microwave photonics devices using laser signal-processing methods in the microwave spectrum. Method. A transverse spatial profile of the electric field strength of a special shape f(x) is created in the caustic of a focused beam of a laser pump pulse with a cylindrical wavefront. The pump pulse must have a converging (for example, cylindrical) wavefront. Computer-synthesized holograms developed by us are used to create an arbitrary f(x) profile. Main results. The effect of the self-diffraction of a pump pulse is studied. This is accompanied by the emission of a series of N coherent resonant pulses with different areas in the range (−3π,…,0,…,3π) from a short focusing region (0.1–1 mm) of a resonant laser pump pulse. The self-diffraction of the pump pulse resulted in 16 emitted pulses with different areas. The distribution of series pulses over the diffraction angle was observed in the angle range from −5∘ to +4∘. The nonlinear generation of 0π-pulses was observed at some angles. The results verify the nonlinear generation of 0π-pulses over a short interaction length between light and a resonant medium for the first time to our knowledge. Practical significance. The obtained results on the effect of the self-diffraction of a resonant pulse with a transverse spatial profile f(x) will serve as a basis for the development of prototype devices for signal-processing problems using low-power laser diodes.
在87rb蒸气自衍射下同时产生不同区域的N相干脉冲
研究主题。本文首次研究了密集扩展谐振介质中共振脉冲的自衍射过程。该过程导致输出辐射的角度偏转,并在(- 3π,…,0,…,3π)范围内连续发射大量N个可变面积的脉冲。脉冲在密集的扩展谐振介质中从泵浦脉冲的小聚焦区域(0.1-1 mm)发射。脉冲波长对应于共振跃迁D287Rb(波长为780.24 nm)。研究目的。在扩展谐振介质铷蒸气中研究了圆柱波前激光脉冲自衍射的非线性效应,利用微波光谱中的激光信号处理方法开发了新型谐振微波光子学器件。方法。在具有圆柱形波前的激光泵浦脉冲聚焦光束的焦散中产生了特殊形状f(x)的电场强度的横向空间剖面。泵浦脉冲必须具有会聚(例如,圆柱形)波前。我们开发的计算机合成全息图用于创建任意的f(x)轮廓。主要的结果。研究了泵浦脉冲的自衍射效应。同时,在短聚焦区域(0.1-1 mm)内,激光泵浦共振脉冲发射出一系列N个不同区域的相干共振脉冲(−3π,…,0,…,3π)。泵浦脉冲的自衍射产生了16个不同面积的发射脉冲。在−5°到+4°的角范围内,观察了一系列脉冲在衍射角上的分布。在某些角度观察到0π脉冲的非线性产生。研究结果首次证实了光与共振介质在短相互作用时间内产生0π脉冲的非线性特性。现实意义。所获得的关于具有横向空间剖面f(x)的谐振脉冲的自衍射效应的结果将作为开发用于低功率激光二极管信号处理问题的原型器件的基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
0.90
自引率
25.00%
发文量
66
审稿时长
3-8 weeks
期刊介绍: The journal publishes design details of a diversity of optical instruments, along with a strong section on computational optics useful to engineers, mathematicians, and physicists, as well as optical scientists. Issues of the English translation volume are published by OSA and appear at the same time as the Russian language edition, Opticheskii Zhurnal, which is produced by the Vavilov State Optical Institute
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