500 mW tunable external cavity diode laser with narrow line-width emission in blue-violet region
Abstract
A tunable external cavity diode laser (ECDL) system with narrow line-width emission at 410 nm is presented. Based on a commercially available laser diode and a Littrow arranged reflective holographic grating, a maximum output power over 500 mW with line-width of about 50 pm is achieved at the rated current. The power efficiency is over 85% and the threshold decreases over 20% compared to the free-running laser diode. Manual tuning range over 5 nm is achieved around threshold condition and over 2 nm at high injection currents up to 500 mA with side mode suppression ratio larger than 20 dB.
- Publication:
-
Optics Laser Technology
- Pub Date:
- November 2017
- DOI:
- 10.1016/j.optlastec.2017.05.023
- Bibcode:
- 2017OptLT..96..176L
- Keywords:
-
- Diode laser;
- Narrow line-width;
- Littrow cavity;
- Holographic grating;
- Wavelength tuning