A low-temperature external cavity diode laser for broad wavelength tuning
Abstract
We report on the design and characterization of a low-temperature external cavity diode laser (ECDL) system for broad wavelength tuning. The performance achieved with multiple diode models addresses the scarcity of commercial red laser diodes below 633 nm, which is a wavelength range relevant to the spectroscopy of many molecules and ions. Using a combination of multiple-stage thermoelectric cooling and water cooling, the operating temperature of a laser diode is lowered to −64 °C, more than 85 °C below the ambient temperature. The laser system integrates temperature and diffraction grating feedback tunability for coarse and fine wavelength adjustments, respectively. For two different diode models, single-mode operation is achieved with 38 mW output power at 616.8 nm and 69 mW at 622.6 nm, more than 15 nm below their ambient temperature free-running wavelengths. The ECDL design can be used for diodes of any available wavelength, allowing individual diodes to be tuned continuously over tens of nanometers and extending the wavelength coverage of commercial laser diodes.
Additional Information
© 2016 AIP Publishing LLC. Received 5 July 2016; accepted 24 October 2016; published online 10 November 2016. We thank Lee R. Liu, Yichao Yu, and John M. Doyle for helpful discussions. W. G. T. acknowledges the support from the Harvard Quantum Optics Center. This work is supported by the NSF through the Harvard-MIT Center for Ultracold Atoms and the Arnold and Mabel Beckman Foundation.Attached Files
Published - 1_2E4967231.pdf
Submitted - 1607.01347.pdf
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Additional details
- Eprint ID
- 81007
- Resolver ID
- CaltechAUTHORS:20170831-073856381
- Harvard Quantum Optics Center
- Harvard-MIT Center for Ultracold Atoms
- Arnold and Mabel Beckman Foundation
- NSF
- Created
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2017-09-05Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field