High power broadband orange laser by double-pass sum-frequency mixing in MgO:PPLN
Abstract
A Watt-level broadband orange laser is demonstrated by use of double-pass sum frequency mixing in a step-chirped MgO-doped periodically poled lithium niobate (MgO:PPLN) crystal (Λ = 10.1-10.4 µm). The temperature-gradient technique is used to enhance the bandwidth of the output spectrum. The maximum output of the orange laser in the 600 nm spectral region is up to 1.1 W whereas the maximum bandwidth of 7.2 nm was accomplished employing a 40 mm long MgO:PPLN structure. This scheme presents an attractive approach for the generation of high power and broadband short-wavelength lasers from a single crystal, which may extend the potential biomedical and spectroscopic applications.
- Publication:
-
Laser Physics Letters
- Pub Date:
- February 2019
- DOI:
- 10.1088/1612-202X/aaf792
- Bibcode:
- 2019LaPhL..16b5402C
- Keywords:
-
- sum frequency generation;
- orange laser;
- quasi phase matching;
- nonlinear crystals