Efficient 559.6 nm light produced by sum-frequency generation of diode-end-pumped Nd:YAG/SrWO4 Raman laser

✍ Scribed by Y.M. Duan; H.Y. Zhu; G. Zhang; C.H. Huang; Y. Wei; C.Y. Tu; Z.J. Zhu; F.G. Yang; Z.Y. You

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 106 KB
• Volume: 7
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.201010017

✦ Synopsis

An efficient yellow-green laser at 559.6 nm based on the sum-frequency generation of diode-end-pumped Nd:YAG/SrWO 4 Raman laser is demonstrated. The 45 mm in length SrWO 4 crystal grown by Czochralski method and the KTP crystal with a type-II critical phase matching (θ = 83.4 • , φ = 0 • ) cut were adopted for Raman conversion and sumfrequency generation, respectively. The maximum average power of 2.41 W was achieved at the incident pump power of 20.4 W and the pulse repetition rate of 60 kHz. The overall diode-yellow conversion efficiency was 11.8% and the slope efficiency was about 24%. The results show that the critical pump power of resonator instability is increasing with the pulse repetition rate. Conversion efficiency, % 12 10 2.8 2.4 8 6 2.0 1.6 4 2 0.8 0 0.4 0 1.2 Average output power at 559.6 nm, W 10 12 14 16 18 20 22

Incident pump power at 808 nm, W

Fitting line: y = 0.24x -2.47

Conversion efficiency and the fitted slope efficiency for yellowgreen laser output at repetition rates of 60 kHz