Growth of high phasematched temperature LiNbO/sub 3/ single crystals and application to efficient second harmonic generation of Nd:YAG. Final report

Technical Report · Fri Aug 01 00:00:00 EDT 1980

OSTI ID:6690806

Byer, R L; Park, Y K; Feigelson, R S; Kway, W L

It was demonstrated that LiNbO/sub 3/ crystals with a phasematching temperature greater than 180/sup 0/C can be grown with small concentration gradients from a melt doped with MgO and excess Li/sub 2/O together with a planar growth interface; that the phasematch temperature can be readily adjusted simply by changing the excess Li/sub 2/O concentration proportional to the phasematch temperature desired; that the crystal quality and SHG characteristics can be maintained as long as the MgO concentration and growth parameters are held constant. We have also found that the self-annealing temperature is much lower, near 120/sup 0/C for the Stanford grown crystals, as compared to the previously reported value of 170 to 180/sup 0/C. Taking advantage of the lower self-annealing temperature, the crystals grown with phasematching temperature of approximately 120/sup 0/C showed exceptional optical homogeneity, and a 40% average power SHG conversion efficiency. The improved hot phasematching LiNbO/sub 3/ crystals along with the electro-optical or piezo-optical compensation for self heating effects should greatly enhance crystal device applications to high average power second harmonic generation of the Nd:YAG source.

• Research Organization: Stanford Univ., CA (USA). Center for Materials Research
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6690806
• Report Number(s): UCRL-15310
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
LASER MATERIALS
LITHIUM COMPOUNDS
OPTICAL PROPERTIES
NEODYMIUM LASERS
NIOBATES
CRYSTAL GROWTH
DAMAGE
MAGNESIUM OXIDES
MONOCRYSTALS
REFRACTIVITY
RESEARCH PROGRAMS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CRYSTALS
LASERS
MAGNESIUM COMPOUNDS
MATERIALS
NIOBIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SOLID STATE LASERS
TRANSITION ELEMENT COMPOUNDS
420300* - Engineering- Lasers- (-1989)