Title :
Large enhancement of second harmonic generation in Li2B4O7 crystals
Author :
Chatterjee, Udit ; Gangopadhyay, Sudipta ; Ghosh, Chittaranjan ; Bhar, Gopal C.
Author_Institution :
Dept. of Phys., Burdwan Univ., India
Abstract :
A simple multipass configuration (MPC) is designed using twin crystals that substantially enhances the conversion efficiency of extra cavity SHG by simultaneous employment of focusing and compensation of double refraction. A newly developed crystal lithium tetraborate (Li2B4O7 or LB4) to demonstrate the feasibility of the scheme since the crystal has effective nonlinearity which is only 1/6th times that of KDP. The configuration improves the conversion efficiency of SHG in this crystal from 4.7 to 21% at the same level of fundamental intensity. Thus the designed MPC can be used for any other nonlinear crystals with higher nonlinearity as well.
Keywords :
birefringence; lithium compounds; optical focusing; optical harmonic generation; optical materials; Li2B4O7; Li2B4O7 crystals; conversion efficiency; double refraction compensation; effective nonlinearity; extracavity SHG; focusing; second harmonic generation; Crystals; Frequency conversion; Government; Laser beams; Monitoring; Nonlinear optics; Optical design; Optical harmonic generation; Rotation measurement; Watthour meters;
Conference_Titel :
Lasers and Electro-Optics Society, 2004. LEOS 2004. The 17th Annual Meeting of the IEEE
Print_ISBN :
0-7803-8557-8
DOI :
10.1109/LEOS.2004.1363539
