Optical breakdown threshold in nanosecond high repetition second harmonic generation by periodically poled Mg-doped LiTaO{sub 3} crystal

Journal Article · Mon Aug 26 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4819758· OSTI ID:22218141

Louchev, Oleg A.; Wada, Satoshi ^[1]; Hatano, Hideki; Kitamura, Kenji ^[2]

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1. Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
2. Division of Environment and Energy Materials, National Institute for Materials Science (NIMS) 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)

Our study shows that a local temperature increase of ≈1 K in the crystal lattice caused by second harmonic generation (SHG) and two-photon absorption of 532 nm radiation at the rear of periodically poled stoichiometric LiTaO{sub 3} crystal by changing spontaneous polarization induces a pyroelectric field ≈10 kV/cm, accelerating free electrons to an energy of ≈10 eV, followed by optical breakdown and crystal damage. Theoretical analysis leads to an explicit expression for the threshold laser fluence of optical breakdown giving ≈1.2 J/cm{sup 2} for 1064 nm input radiation in 6.8 kHz pulsed SHG operation, agreeing well with the experimentally found value ≈1.32 J/cm{sup 2}.

• OSTI ID: 22218141
• Journal Information: Applied Physics Letters, Vol. 103, Issue 9; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
BREAKDOWN
CRYSTAL LATTICES
CRYSTALS
DOPED MATERIALS
ELECTRIC CHARGES
ELECTRONS
EV RANGE
HARMONIC GENERATION
KHZ RANGE
LASERS
LITHIUM COMPOUNDS
MAGNESIUM
PERIODICITY
PHOTONS
POLARIZATION
STOICHIOMETRY
TEMPERATURE DEPENDENCE