Pump-beam-induced optical damage depended on repetition frequency and pulse width in 4-dimethylamino-N Prime -methyl-4 Prime -stilbazolium tosylate crystal

Journal Article · Mon Jul 08 04:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4813602· OSTI ID:22122792

Matsukawa, Takeshi; Nawata, Kouji; Notake, Takashi; Feng, Qi; Kawamata, Hiroshi; Minamide, Hiroaki ^[1]

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1. Tera-photonics Laboratory, RIKEN, 519-1399, Aramaki-Aoba, Aoba-ku, Sendai 980-0845 (Japan)

We investigated the dependence of optical damage to an organic nonlinear optical crystal of 4-dimethylamino-N Prime -methyl-4 Prime -stilbazolium tosylate (DAST) on the repetition frequency and pulse width of the pump beam used to cause the thermal damage. For a pump beam with a pulse width of 15 ns at a wavelength of 1064 nm, the highest damage threshold of 8.0 J/cm{sup 2} was measured for repetition frequencies in the range from 10 to 40 Hz. On the other hand, DAST crystals were easily damaged under the repetition rates from 50 to 100 Hz. For 600-ps pulses, a higher damage threshold that was a factor of 11 to 28 times higher in terms of peak intensity was obtained compared with that of 15-ns pulses. In both the cases of 15-ns pulse duration and 600-ps duration, we demonstrated that the thermal effects in DAST crystals dominated the optical damage, which depended on thermal accumulation and dissipation.

• OSTI ID: 22122792
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 2 Vol. 103; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEAMS
CRYSTALS
DAMAGE
LASER RADIATION
NONLINEAR OPTICS
NONLINEAR PROBLEMS
OPTICAL PUMPING
ORGANIC COMPOUNDS
PEAKS
POLYMERS
PULSES
TEMPERATURE DEPENDENCE
WAVELENGTHS