In this paper, we report the first systematical analyses of the room temperature noncritical phase match-ing (NPM) curves for biaxial crystals of KTP and KNb03. The advantages and potential applications using these NPM conditions are explored, with an emphasis on tunable lasers in diode-pumped systems.
J. T. Lin,
"Noncritically Phase-Matched Ktp And KnbO3 For Tunable Lasers At Room Temperature", Proc. SPIE 1040, High Power and Solid State Lasers II, (6 July 1989); doi: 10.1117/12.951182; https://doi.org/10.1117/12.951182