Open AccessEfficient high-power continuous-wave lasers at green-lime-yellow wavelengths by using a Nd:YVO4 self-Raman crystal
Author(s) -
Yung-Fu Chen,
Yuxin Pan,
Y. C. Liu,
Hao Cheng,
C. H. Tsou,
H. C. Liang
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.002029
Subject(s) - lithium triborate , optics , materials science , laser , sum frequency generation , second harmonic generation , raman spectroscopy , energy conversion efficiency , optoelectronics , wavelength , dichroic glass , continuous wave , femtosecond , nonlinear optics , physics
Efficient high-power continuous-wave Nd:YVO 4 visible lasers at versatile wavelengths of 532 (green), 559 (lime), and 588 nm (yellow) are demonstrated to be achieved by using the identical cavity mirrors and gain medium. A dichroic coating is deposited on one end surface of the gain medium to gather the backward green-yellow emission. The green, lime, and yellow outputs are individually optimized by using different phase-matched lithium triborate (LBO) crystals for second harmonic generation (SHG) of the fundamental field, sum frequency generation (SFG) of the fundamental and the stimulated Raman fields, and SHG of the stimulated Raman field, respectively. At a pump power of 31.6 W, the output powers at 532, 559, and 588 nm can be up to 6.8, 5.4, and 3.1 W. The high efficient and compact Nd:YVO 4 lasers at green-lime-yellow wavelengths can be potentially beneficial to future applications in retinal photocoagulation.