External-cavity diode laser at 2.6 µm and its frequency stabilization with a scanning Fabry-Pérot cavity

被引：0
|
作者：
Ganesh, Sandhya [1 ]
Zhang, Shengnan [1 ]
Tiwari, Balsant Shivanand [1 ]
Singh, Yeshpal [1 ]
机构：
[1] School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham,B15 2TT, United Kingdom
来源：
Optics Express | 2024年 / 32卷 / 24期
基金：
欧盟地平线“2020”;
关键词：
Atom lasers - Echo suppression - Laser excitation - Laser mode locking - Power spectral density;
D O I：
10.1364/OE.539358
中图分类号：
学科分类号：
摘要：
We report on the construction of an external cavity diode laser at 2.6 µm wavelength and its frequency stabilization with an external scanning Fabry-Pérot cavity using Pound-Drever-Hall (PDH) frequency stabilization technique. We discuss the frequency noise characteristics of the laser using the PDH residual error signal analysis and the locking performance. We have achieved a 2.5 x 105 suppression factor in the frequency noise power spectral density at Fourier frequencies lower than 100 Hz when the laser is stabilized. The laser is employed to observe resonant excitation on the 5s5p3P0 → 5s4d3D1 transition in cold 88Sr atoms trapped in a magneto-optical trap. We have observed an enhancement in the trapped atom number by a factor of 8.3 compared to the case when a single laser at 707 nm is employed for repumping. © 2024 Optica Publishing Group (formerly OSA). All rights reserved.
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页码：43239 / 43248
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