光学
刚度(电磁)
回复反射器
激光器
光路
材料科学
杂散光
分光计
干扰(通信)
吸收(声学)
光路长度
物理
计算机科学
电信
频道(广播)
复合材料
作者
Manuel Gräf,Lukas Emmenegger,Béla Tuzson
出处
期刊:Optics Letters
[The Optical Society]
日期:2018-05-16
卷期号:43 (11): 2434-2434
被引量:53
摘要
Compact and lightweight laser absorption spectrometers for accurate trace gas measurements are of great scientific and commercial importance. In these instruments, the multipass cell (MPC) represents a critical element in terms of achievable size and sensitivity. Herein, we introduce a versatile MPC concept which unifies compactness, mechanical rigidity, and optical stability. Relying on fundamental cavity design principles and modern diamond turning techniques, we have developed a segmented circular MPC that allows efficient and interference-free beam folding. A prototype cell is presented featuring up to 10 m optical path length at a total mass of less than 200 g. Incorporated in a highly compact setup without additional beam pre-shaping optics, we demonstrate a normalized noise level of low 10-4 (2σ) at 1 Hz.
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