1. Double-pass high-efficiency sum-frequency generation of a broadband orange laser in a single MgO:PPLN crystal
- Author
-
Li Guangwei, Wan-Guo Liang, Chen Huaixi, Lei Guo, and Dismas K. Choge
- Subjects
Sum-frequency generation ,Materials science ,business.industry ,Bandwidth (signal processing) ,Lithium niobate ,Energy conversion efficiency ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Laser ,01 natural sciences ,Electronic, Optical and Magnetic Materials ,law.invention ,010309 optics ,chemistry.chemical_compound ,chemistry ,law ,0103 physical sciences ,Broadband ,Optoelectronics ,0210 nano-technology ,business ,Single crystal ,Visible spectrum - Abstract
A high-efficiency 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 (ᴧ = 10.1-10.4 µm). The temperature-gradient technique is used to enhance the bandwidth of the output spectrum. A maximum orange output power of 129 mW (~65% conversion efficiency) was achieved at room temperature operation, and up to ~7.2 nm bandwidth at a temperature difference of 20 ᵒC was realized. 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.
- Published
- 2019