Dual-channel amplification in a single-mode diode laser for multi-isotope laser cooling
- Department of Physics, British Columbia Institute of Technology, 3700 Willingdon Avenue, Burnaby, British Columbia V5G 3H2 (Canada)
- Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia V6T 1Z1 (Canada)
The output from two grating-stabilized external-cavity diode lasers were injected into a single-mode diode laser. Operating at a wavelength of 780 nm, this laser produced {approx}50 mW of power with two main frequency components of the same spectral characteristics of the seed lasers. The power ratio of the amplified components was freely adjustable due to gain saturation, and amplification was observed for frequency differences of the two seed lasers in the range from 73 MHz to 6.6 GHz. This system was used to realize a dual isotope magneto-optic trap (MOT) for rubidium ({sup 85}Rb and {sup 87}Rb). The resulting position and cloud size of the dual isotope MOT was the same as that of the single species MOTs to within {+-}10 and {+-}20 {mu}m, respectively. We also characterized the additional spectral components produced by four wave mixing (FWM) in the diode laser amplifier and utilized a particular FWM sideband to realize hyperfine pumping and subsequent laser trapping of {sup 85}Rb in the absence of a 'repump' laser dedicated to hyperfine pumping.
- OSTI ID:
- 21013796
- Journal Information:
- Journal of the Optical Society of America. Part B, Optical Physics, Vol. 24, Issue 11; Other Information: DOI: 10.1364/JOSAB.24.002914; (c) 2007 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0740-3224
- Country of Publication:
- United States
- Language:
- English
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