Abstract
Active frequency-chirp control for a narrowband pulsed titanium–sapphire laser oscillator–amplifier laser system is demonstrated using an intra-cavity electro-optic modulator, resulting in improved spectral resolution and stability. Beat-note measurements of its output to a continuous-wave laser locked to an optical frequency comb yields an Allan deviation of 5 × 10−11 (at 10 s). Correction of residual chirp from a comparison with the fourth-harmonic upconverted pulsed output to a molecular H2 two-photon resonance delivers a value for the uncertainty contribution due to frequency chirp below the 1.5 × 10−10 level.
| Original language | English |
|---|---|
| Pages (from-to) | 5909-5912 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 45 |
| Issue number | 21 |
| Early online date | 20 Oct 2020 |
| DOIs | |
| Publication status | Published - 1 Nov 2020 |
Funding
Funding. European Research Council (670168); Chinese Academy of Sciences (XDB21020100); National Natural Science Foundation of China (21688102).
| Funders | Funder number |
|---|---|
| Horizon 2020 Framework Programme | 670168 |
| European Research Council | |
| National Natural Science Foundation of China | 21688102 |
| Chinese Academy of Sciences | XDB21020100 |