法布里-珀罗腔在非平行光束入射下的有效透射率

IF 1.5 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Chinese Physics B Pub Date : 2024-01-01 DOI:10.1088/1674-1056/ad0ec3
Yin-Sheng Lv, Pin-Hua Xie, Jin Xu, You-Tao Li, Hua-Rong Zhang
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引用次数: 0

摘要

法布里-佩罗(Fabry-Pérot,FP)谐振腔因其独特的干涉传递函数(ITF)而广泛应用于激光和光谱测量。在平行入射光的理想情况下,FP 谐振腔的 ITF 可用艾里函数表示。然而,在现实中,准直光束很难达到完美的平行度。本文建立了非平行入射光的理论模型,假定非平行入射光为锥形光束,并用锥角来量化光束的非平行度。得出了非平行入射光下 FP 谐振腔的透射比函数。实验验证了模型的准确性。在此模型的基础上,研究了发散角、倾斜角和 FP 腔参数(反射率、腔长)对 ITF 的影响。解释了在非平行光入射条件下干涉峰值减小、变宽和不对称的原因。文章建议,在设计和应用 FP 谐振腔时,应考虑干涉峰和入射光准直效应之间的微妙平衡,尤其是在倾斜应用(如角度扫描光谱学)中。本文的研究成果对 FP 谐振腔的设计和应用具有一定的指导意义。
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Effective transmittance of Fabry–Perot cavity under non-parallel beam incidence
The Fabry–Pérot (FP) resonant cavity is widely used in laser and spectroscopic measurements due to its unique interference transfer function (ITF). In the ideal case of parallel incident light, the ITF of the FP resonant cavity can be expressed by the Airy function. However, in reality, it is difficult to achieve perfect parallelism with collimated beams. In this article, a theoretical model is established for non-parallel light incidence, which assumes that the non-parallel incident light is a cone-shaped beam, and the cone angle is used to quantify the non-parallelism of the beam. The transmittance function of the FP resonant cavity under non-parallel light incidence is derived. The accuracy of the model is experimentally verified. Based on this model, the effects of divergence angle, tilt angle and FP cavity parameters (reflectivity, cavity length) on the ITF are studied. The reasons for the decrease in peak value, broadening and asymmetry of the interference peak under non-parallel light incidence are explained. It is suggested that a fine balance between the interference peak and the collimation effect of the incident light should be considered in the design and application of FP resonant cavities, especially for tilted applications such as angle-scanned spectroscopy. The research results of this article have certain significance for the design and application of FP resonant cavities.
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来源期刊
Chinese Physics B
Chinese Physics B 物理-物理:综合
CiteScore
2.80
自引率
23.50%
发文量
15667
审稿时长
2.4 months
期刊介绍: Chinese Physics B is an international journal covering the latest developments and achievements in all branches of physics worldwide (with the exception of nuclear physics and physics of elementary particles and fields, which is covered by Chinese Physics C). It publishes original research papers and rapid communications reflecting creative and innovative achievements across the field of physics, as well as review articles covering important accomplishments in the frontiers of physics. Subject coverage includes: Condensed matter physics and the physics of materials Atomic, molecular and optical physics Statistical, nonlinear and soft matter physics Plasma physics Interdisciplinary physics.
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