Semi-organic Nonlinear Optical Crystals for Laser Frequency Conversion

The book deals with study of the properties, advantages and disadvantages of organic, semi-organic and inorganic with broad perspective in detail. Growth single crystals of 4-hydroxy 3-methoxy benzaldehyde (vanillin), an excellent molecular NLO material, from melt by Bridgman technique is reported for the first time. Precise temperature profile plot of the resistive furnace was measured using a simple PC based time-temperature data logging system. Vanillin is a potential candidate for a blue light generator from IR diode laser light. New single crystals of L-Histidine mono hydrochloride (LHMHCL), L-Histidine di hydrochloride(LHDHCL), bis thiourea zinc Acetate (BTZA) and KDP:La are grown from aqueous solution. For growth of bulk crystals of La:KDP, accelerated seed rotation method was employed and rotated on both direction using a stepper motor driven by microcontroller. UV-Vis spectra show excellent transmission through the visible region up to 1100 nm. Laser damage threshold values were determined using Q-switched Nd:YAG laser operating at 1064 nm and with 25 ns pulses in single shot mode. The powder SHG efficiency was better than materials like KDP and CTA.

Autorentext

Kannan is a Asst. Professor in MINT, Dongguk Univ.,Seoul and is working in Quantum dot memory device. He has published 20 articles in refereed international journals. He completed Ph.D in Growth of Laser and Nonlinear Crystals in 2006 under Prof.P.Ramasamy at Crystal Growth Centre, Anna Univ. He was awarded SRF by CSIR, Govt. of India in 2003.