1J.T.Lin,J.L.Montgomery. generation of tunable MID-IR(I.8-2.4 μm)laser from optical parametric oscillation in KTP. Opt Comm,1990,75:315-320.
2D.J.Armstrong, W.J.Alford,T.D.Raymond, A.V.Smith.Absolute measurement of the effective nonlinearities of KTP and BBO crystals by optic parametric amplification. Appl Opt, 1996,35:2032-2040.