Highly Efficient Sodium <i>D</i><sub>2</sub> Resonance Light Generation and Doppler-free Saturation Fluorescence Spectroscopy to Determine Reference Frequency for Sodium Lidar
The sodium D2 resonance light was generated in sum-frequency generation pumped with two continuous-wave distributed-feedback lasers. The output power reached 11 mW at a wavelength near the sodium D2 line with a high conversion efficiency in a fiber-coupled periodically poled LiNbO3 waveguide. Three dominant spectra, the D2-a, the D2-b, and the crossover resonance, were clearly observed in Doppler-free saturation spectroscopy by high-rate scanning the sum frequency at around the D2 resonance line with a linewidth of ≈ 3 MHz.
Authors
- Michio Sakashita
- Tetsuya Kawabata
- Satonori Nozawa (ORCID: https://orcid.org/0000-0002-4359-6524)
- Takuya Kawahara (ORCID: https://orcid.org/0000-0001-7200-9176)
- Takuo T. Tsuda (ORCID: https://orcid.org/0000-0002-5751-7743)
- Satoshi Wada
- Norihito Saito
Institutions
- University of Electro-Communications (JP)
- RIKEN (JP)
- Ōtani University (JP)
- Nagoya University (JP)
Publication Details
- Journal
- IEEJ Transactions on Electronics Information and Systems
- Published
- 2026-03-31
- DOI
- https://doi.org/10.1541/ieejeiss.146.268
- Primary Topic
- Photorefractive and Nonlinear Optics
- Type
- article
- Field-Weighted Citation Impact
- 0.00