Abstract
We present a compact, all-room-temperature continuous-wave laser source in the visible spectral region between 574 and 647 nm by frequency doubling of a broadly tunable InAs/GaAs quantum-dot external-cavity diode laser in a periodically poled potassium titanyl phosphate crystal containing three waveguides with different cross-sectional areas (4 × 4, 3 × 5, and 2 μm × 6 μm). The influence of a waveguide's design on tunability, output power, and mode distribution of second-harmonic generated light, as well as possibilities to increase the conversion efficiency via an optimization of a waveguide's cross-sectional area, was systematically investigated. A maximum output power of 12.04 mW with a conversion efficiency of 10.29% at 605.6 nm was demonstrated in the wider waveguide with the cross-sectional area of 4 μm × 4 μm.
| Original language | English |
|---|---|
| Pages (from-to) | 835-838 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 40 |
| Issue number | 5 |
| Early online date | 27 Feb 2015 |
| DOIs | |
| Publication status | Published - 1 Mar 2015 |
Bibliographical note
Funding: EU FP7 program through the FAST-DOT project (contract no. 224338) and RFBR grant no. 14-02-01160.Keywords
- harmonic generation and mixing
- waveguides
- semiconductor lasers
- tunable lasers
- visible lasers
- devices nonlinear optics