Open Access18W ultra-narrow diode laser absolutely locked to the Rb D2 line
Author(s) -
Hao Tang,
Huizi Zhao,
Rui Wang,
Liang Li,
Zining Yang,
Hongyan Wang,
Weiping Yang,
Kai Han,
Xiaojun Xu
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.442523
Subject(s) - optics , laser , materials science , laser pumping , optoelectronics , laser power scaling , tunable diode laser absorption spectroscopy , diode pumped solid state laser , optical pumping , diode , far infrared laser , injection seeder , laser diode , distributed feedback laser , laser linewidth , physics
We described a wavelength locked and spectral narrowed high-power diode laser with a Faraday anomalous dispersion optical filter (FADOF). By an external cavity with a 85 Rb FADOF, the central wavelength of the diode laser was precisely locked to the Rb resonance D 2 line. The bandwidth was narrowed from the free-running 4 nm to 0.002 nm (1.2 GHz, FWHM). At 4.9 A maximal driven current, the laser produced a continuous wave (CW) output of 18 W with an external cavity efficiency of 80%, either the current or the temperature had no impact on the central wavelength of the diode laser. The Rb cell works well without any damage under a long-time running. This ultra-stable and extreme-narrowed high power diode laser would find many applications in alkali lasers pumping, metastable rare gas laser pumping, spin-exchange optical pumping, and quantum optics.