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- Title
A narrow-line-width external cavity quantum dot laser for high-resolution spectroscopy in the near-infrared and yellow spectral ranges.
- Authors
Nevsky, A. Yu.; Bressel, U.; Ernsting, I.; Eisele, Ch.; Okhapkin, M.; Schiller, S.; Gubenko, A.; Livshits, D.; Mikhrin, S.; Krestnikov, I.; Kovsh, A.
- Abstract
We demonstrate a diode laser system which is suitable for high-resolution spectroscopy in the 1.2 μm and yellow spectral ranges. It is based on a two-facet quantum dot chip in a Littrow-type external cavity configuration. The laser is tunable in the range 1125–1280 nm, with an output power of more than 200 mW, and exhibits a free-running line width of 200 kHz. Amplitude and frequency noise were characterized, including the dependence of the frequency noise on the cavity length. Frequency stabilization to a high-finesse reference cavity is demonstrated, whereby the line width was reduced to approx. 30 kHz. Using a femtosecond frequency comb, the residual frequency instability was determined and found to be below 300 Hz on the time scales 1–300 s. Yellow light (>3 mW) at 578 nm was generated by frequency doubling in an enhancement cavity containing a PPLN crystal. The source has potential application for precision spectroscopy of ultra-cold Yb atoms and cold molecular hydrogen ions.
- Subjects
SPECTRUM analysis; QUANTUM dots; LASERS; INFRARED spectroscopy; HYDROGEN ions
- Publication
Applied Physics B: Lasers & Optics, 2008, Vol 92, Issue 4, p501
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-008-3113-4