基于原位成像的自适应激光射击光纤微镜的轮廓控制。

IF 3.3 2区 物理与天体物理 Q2 OPTICS
Optics express Pub Date : 2025-09-08 DOI:10.1364/OE.564341
Shaobo Gao, Vishnu Kavungal, Shuma Oya, Daichi Okuno, Ezra Kassa, William J Hughes, Peter Horak, Hiroki Takahashi
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引用次数: 0

摘要

光纤法布里-珀罗腔(FFPCs)由于其模体积小且与光纤紧密集成,被广泛应用于腔量子电动力学(CQED)和量子技术的各种研究中。我们开发了一种新的CO2激光加工方法,可以在劈裂光纤的端面上产生良好控制的表面轮廓。该方法利用不同空间分布模式的多次射击,采用一种射击算法,在射击过程中自适应改变激光烧蚀参数,以抑制与期望剖面的偏差。这可以通过对加工轮廓的原位成像、检查和在后续步骤中使用信息来实现。该算法的基础是一个新发现的激光烧蚀参数,即射击之间的停顿,它控制了连续激光射击之间的热量积累,从而确定了单个烧蚀序列所产生的影响面积。我们制造了曲率半径为250µm至700µm的光纤微镜,其有效反射镜直径为60µm,可采用高斯或球形轮廓。由于我们的自适应算法的自校正特性,我们在产生低椭圆率的所需轮廓方面实现了接近100%的成功率。在激光加工的光纤端面上涂上高反射率涂层后,形成的ffpc在854 nm的光波长下显示出高达150,000的高精细度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Profile control of fiber-based micro-mirrors using adaptive laser shooting with in situ imaging.

fiber Fabry-Perot cavities (FFPCs) are used in various studies in cavity quantum electrodynamics (CQED) and quantum technologies due to the cavity's small mode volume and compact integration with optical fibers. We develop a novel CO2 laser machining method that produces well-controlled surface profiles on the end facets of cleaved optical fibers. Using multiple shots in distinct spatial distribution patterns, our method employs a shooting algorithm that adaptively changes laser ablation parameters during the shooting to suppress deviations from the desired profile. This is made possible by in situ imaging of the machined profile, its inspection, and the usage of the information in the subsequent steps. Underlying this algorithm is a newly found laser ablation parameter, the pause between shots, which controls the accumulation of heat in between successive laser shots, and as a result, determines the area of impact made by an individual ablation sequence. We fabricate fiber-based micro-mirrors with radii of curvature ranging from 250 µm to 700 µm with an effective mirror diameter of 60 µm in either Gaussian or spherical profiles. Due to the self-correcting nature of our adaptive algorithm, we achieve a near 100% success rate in the production of desired profiles with low ellipticity. After furnishing the laser-machined fiber end facets with high reflectivity coating, FFPCs are formed to demonstrate a high finesse up to 150,000 at an optical wavelength of 854 nm.

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来源期刊
Optics express
Optics express 物理-光学
CiteScore
6.60
自引率
15.80%
发文量
5182
审稿时长
2.1 months
期刊介绍: Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.
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