TEMPERATURE SENSITIVITY OF KDP FOR PHASE-MATCHED FREQUENCY-CONVERSION OF 1-MU-M LASER-LIGHT

The magnitudes of the derivatives of the phase-matching angles with respect to temperature \partial derivative theta(pm)/partial derivative T\ (milliradians/degree Celsius), for critically phase-matched frequency conversion using KDP (KH2PO4) have been directly measured for the five most interesting processes to inertial confinement fusion (ICF) laser-system designers: 2omega I, 2omega II, 3omega I, 3omega II, and 4omega I. These measurements span an approximate temperature range of 25 to 90-degrees-C, and were performed at a fundamental (1omega) wavelength of lambda = 1.064 mum. The results are used to calculate the phase-matching thermal-sensitivity parameter \beta(T)\ (centimeter-1/milliradian), for each conversion process.