Kim, J. W. Jeong, J. Lee, K. Lee, S. B. 2024-01-20T14:03:23Z 2024-01-20T14:03:23Z 2021-09-05 2012-09 0946-2171 https://pubs.kist.re.kr/handle/201004/128935 Efficient second-harmonic generation of continuous-wave Yb fiber lasers is reported. A simple bow-tie external resonant cavity incorporating a type I LBO nonlinear optical crystal was employed for second harmonic frequency conversion of a multi-longitudinal-mode Yb fiber laser. It is shown that strong coupling was formed between the Yb fiber laser and the external cavity and, as a result, the laser produced 9.1 W of green output at 535 nm for 43 W of absorbed diode pump power at 975 nm corresponding to an optical conversion efficiency of 21 % with respect to absorbed diode pump power. The prospects for further improvement are discussed. English SPRINGER HEIDELBERG GREEN Efficient second-harmonic generation of continuous-wave Yb fiber lasers coupled with an external resonant cavity Article 10.1007/s00340-012-5098-2 1 APPLIED PHYSICS B-LASERS AND OPTICS, v.108, no.3, pp.539 - 543 APPLIED PHYSICS B-LASERS AND OPTICS 108 3 539 543 scie scopus 000309212200011 2-s2.0-84868519103 Optics Physics, Applied Optics Physics Article GREEN Fiber laser External resonant cavity LBO Second harmonic Yb fiber