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A high-power narrow-linewidth optical parametric oscillator based on PPMgLN

Author:
Peng, Y. F.  Wei, X. B.  Xie, G.  Gao, J. R.  Li, D. M.  Wang, W. M.  


Journal:
LASER PHYSICS


Issue Date:
2013


Abstract(summary):

A high-power and narrow-linewidth tunable optical parametric oscillator based on PPMgLN is presented. The phase matching type e -> e + e is used to avoid the walk-off effect and utilize the maximum nonlinear coefficient d(33) (27.4 pm V-1) of the PPMgLN crystal (5 mol% MgO doped). When the pump power of the 1064 nm laser is 50 W and the temperature of the PPMgLN crystal is 100 degrees C, average output power of 15.8 W is obtained with a slope efficiency of 40.6%. The 1.655 mu m signal and 2.98 mu m idler output powers are 9.5 W and 6.3 W, respectively. The linewidth of the 1.655 mu m signal laser is 1.00 nm before compression and 0.05 nm after compression. The compression ratio is 20. The linewidth of the 2.98 mu m idler laser is within 0.30-0.63 nm based on theoretical analysis of the linewidth of the 1064 nm pump laser and 1.655 mu m signal laser. The output wavelength can be tuned from 1.6 to 1.8 mu m and from 3.1 to 2.7 mu m by changing the temperature of the 31.2 mu m PPMgLN crystal from 30 to 200 degrees C.


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