Sub-kHz-linewidth VECSELs for cold atom experiments
| Autor: | Kai Bongs, Jennifer E. Hastie, P. H. Moriya, Yeshpal Singh |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry 02 engineering and technology Optical field 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention Semiconductor laser theory Transverse mode 010309 optics Finesse Full width at half maximum Laser linewidth Optics Ultracold atom law 0103 physical sciences 0210 nano-technology business QC |
| Zdroj: | Optics express. 28(11) |
| ISSN: | 1094-4087 |
| Popis: | We report and characterize sub-kHz linewidth operation of an AlGaInP-based VECSEL system suitable for addressing the narrow cooling transition of neutral strontium atoms at 689 nm. When frequency-stabilized to a standard air-spaced Fabry-Perot cavity (finesse 1000) via the Pound-Drever-Hall (PDH) technique, it delivers output power >150 mW in a circularly-symmetric single transverse mode with low frequency and intensity noise. The optical field was reconstructed from the frequency noise error signal via autocorrelation and the Wiener-Khintchine theorem, leading to an estimated linewidth of (125 ± 2) Hz. Optical beat note measurements were performed against a commercial locked laser system and a second, almost identical, VECSEL system resulting in linewidths of 200 Hz and 160 Hz FWHM, respectively. To the best of our knowledge, this is the first demonstration of a VECSEL compatible with the narrowest of lines (few hundred Hz) used for cooling and trapping atoms and ions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|