5 mJ, sub-nanosecond PPSLT OPA at 0.5 kHz, tunable in the water absorption band at 3 microns

D. Chuchumishev, A. Gaydardzhiev, Claus-Peter Richter, I. Buchvarov*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Coherent mid-IR sources (2.5-4 μm) combining high average power and high pulse energy are essential for a great number of industrial, scientific and commercial applications. Furthermore, they have broad medical implications, due to the high water absorption around 3μm. Due to the limited choice of laser materials emitting directly in this spectral range, covering it can be efficiently achieved through nonlinear frequency conversion devices, pumped by Q-switched Nd-laser systems, operating at kHz repetition rates. A fundamental efficiency limitation in short-pulsed OPOs is the available resonant wave build-up time. In order to keep this time period small compared to the pump pulse duration in short cavity OPOs, one should make use of highly nonlinear optical media. Furthermore, pulsed OPOs reaching mJ level output are prone to optical component damage due to the high amount of energy circulating inside the OPO cavity [1]. Mid-IR OPO output can be scaled significantly beyond this threshold by employing an optical parametric amplification (OPA) stage, determining the output energy and efficiency of the whole system [2]. Naturally, given the potential benefits, the search for nonlinear materials for frequency conversion in mid IR have recently intensified [1, 2]. However for really high power (energy) frequency down-conversion devices in the spectral region between 2.5 and 4 μm, periodically poled stoichiometric lithium tantalate (PPSLT) with its low coercive field (0.8 kV/mm), high refraction damage threshold and transparency up to 5 μm, is amongst the very few suitable candidate.

Original languageEnglish (US)
Title of host publication2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference, CLEO/Europe-IQEC 2013
PublisherIEEE Computer Society
DOIs
StatePublished - Jan 1 2013
Event2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference, CLEO/Europe-IQEC 2013 - Munich, Germany
Duration: May 12 2013May 16 2013

Other

Other2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference, CLEO/Europe-IQEC 2013
CountryGermany
CityMunich
Period5/12/135/16/13

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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