Abstract
We observed saturated absorption spectra of potassium at 404.8 nm with a frequency-stabilized violet diode laser. A diffraction grating in the Littrow configuration was used to get a single-mode output, and simultaneous resonant optical feedback from a confocal Fabry-Perot cavity was employed to stabilize the laser frequency. The observed short-term frequency fluctuations are 300 kHz for 1 s, and the upper limit on the instantaneous linewidth is 1.5 MHz. The optically locked laser can be continuously scanned over 4 GHz. The observed typical linewidth of the potassium transition is 3.6 MHz with a signal-to-noise ratio of 17. The transition is suitable for stabilizing frequency of violet diode lasers to a sub-MHz level.
| Original language | English |
|---|---|
| Pages (from-to) | L332-L334 |
| Journal | Japanese Journal of Applied Physics, Part 2: Letters |
| Volume | 42 |
| Issue number | 3 B |
| Publication status | Published - Mar 15 2003 |
| Externally published | Yes |
Keywords
- Confocal Fabry-Perot cavity
- Potassium
- Resonant optical feedback
- Saturated absorption spectroscopy
- Violet diode laser
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)
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Uetake, S., Hayasaka, K., & Watanabe, M. (2003). Saturation spectroscopy of potassium for frequency stabilization of violet diode lasers. Japanese Journal of Applied Physics, Part 2: Letters, 42(3 B), L332-L334.