Second harmonic generation and laser damage studies in zinc (tris) thiourea sulfate crystals

Author

Gupte, S.S. ; Pradhan, Ranjit D. ; Melikechi, Noureddine ; Desai, C.F.

Author_Institution

Appl. Opt. Center of Delaware, Delaware State Univ., Dover, DE, USA

fYear

2002

fDate

24-24 May 2002

Firstpage

229

Abstract

Summary form only given. Zinc (tris) thiourea sulfate (ZTS) is a semiorganic nonlinear optical (NLO) crystal with a low optical absorption for sub-micron near-infrared (NIR) wavelengths. In the nineties, ZTS drew considerable attention as a second harmonic generation (SHG) crystal for 1064 nm wavelength but the presence of an absorption peak around 1040 nm remained a serious impediment. Using as-grown ZTS crystals and /spl sim/100 fs laser pulses, we measured phase matching angles as a function of NIR wavelengths. We also conducted laser damage studies using 8 ns pulses at 10 Hz repetition rate at 532 and 1064 nm generated from an Nd:YAG laser. We show that for sub-micron NIR, ZTS has an effective d coefficient and a damage threshold comparable to those of broadly used NLO crystals.

Keywords

laser beam effects; optical harmonic generation; optical materials; organic compounds; zinc compounds; 100 fs; 1040 nm; 1064 nm; 532 nm; 8 ns; YAG:Nd; YAl5O12:Nd; absorption peak; damage threshold; laser damage studies; low optical absorption; phase matching angles; second harmonic generation; semiorganic nonlinear optical crystal; sub-micron near-infrared wavelengths; zinc thiourea sulfate crystals; Absorption; Crystals; Frequency conversion; Impedance; Nonlinear optics; Optical harmonic generation; Optical pulse generation; Optical pulses; Pulse measurements; Zinc;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2002. CLEO '02. Technical Digest. Summaries of Papers Presented at the

Conference_Location

Long Beach, CA, USA

Print_ISBN

1-55752-706-7

Type

conf

DOI

10.1109/CLEO.2002.1033880

Filename

1033880