Limited efficiency of a silver selenogallate optical parametric oscillator caused by two-photon absorption

Shaul Pearl; Shlomo Fastig; Yosef Ehrlich; Raphael Lavi

doi:10.1364/AO.40.002490

Limited efficiency of a silver selenogallate optical parametric oscillator caused by two-photon absorption

Shaul Pearl, Shlomo Fastig, Yosef Ehrlich, Raphael Lavi

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The nonresonant two-photon absorption ~TPA! coefficient in silver selenogallate (AgGaSe₂) crystals was measured for both ordinary and extraordinary polarizations in the 1300–1600xy1nm wavelength range. We found a cutoff wavelength for the TPA at between 1400 and 1500 nm, which corresponds to half of the bandgap energy of the AgGaSe₂ crystal. Below the cutoff wavelength we measured the TPA coefficient to be approximately 0.035 cmyMWfor the extraordinary polarization and two to three times lower for the ordinary polarization. We compared the AgGaSe₂ samples from two manufacturers and observed a factor of 2 difference in the TPA coefficients. Because of the high TPA, the 1.32-μm pumped AgGaSe2 optical parametric oscillator conversion efficiency was clipped at a low level.

Original language	English
Pages (from-to)	2490-2492
Number of pages	3
Journal	Applied Optics
Volume	40
Issue number	15
DOIs	https://doi.org/10.1364/AO.40.002490
State	Published - 20 May 2001
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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title = "Limited efficiency of a silver selenogallate optical parametric oscillator caused by two-photon absorption",

abstract = "The nonresonant two-photon absorption ~TPA! coefficient in silver selenogallate (AgGaSe2) crystals was measured for both ordinary and extraordinary polarizations in the 1300–1600xy1nm wavelength range. We found a cutoff wavelength for the TPA at between 1400 and 1500 nm, which corresponds to half of the bandgap energy of the AgGaSe2 crystal. Below the cutoff wavelength we measured the TPA coefficient to be approximately 0.035 cmyMWfor the extraordinary polarization and two to three times lower for the ordinary polarization. We compared the AgGaSe2 samples from two manufacturers and observed a factor of 2 difference in the TPA coefficients. Because of the high TPA, the 1.32-μm pumped AgGaSe2 optical parametric oscillator conversion efficiency was clipped at a low level.",

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T1 - Limited efficiency of a silver selenogallate optical parametric oscillator caused by two-photon absorption

AU - Pearl, Shaul

AU - Fastig, Shlomo

AU - Ehrlich, Yosef

AU - Lavi, Raphael

PY - 2001/5/20

Y1 - 2001/5/20

N2 - The nonresonant two-photon absorption ~TPA! coefficient in silver selenogallate (AgGaSe2) crystals was measured for both ordinary and extraordinary polarizations in the 1300–1600xy1nm wavelength range. We found a cutoff wavelength for the TPA at between 1400 and 1500 nm, which corresponds to half of the bandgap energy of the AgGaSe2 crystal. Below the cutoff wavelength we measured the TPA coefficient to be approximately 0.035 cmyMWfor the extraordinary polarization and two to three times lower for the ordinary polarization. We compared the AgGaSe2 samples from two manufacturers and observed a factor of 2 difference in the TPA coefficients. Because of the high TPA, the 1.32-μm pumped AgGaSe2 optical parametric oscillator conversion efficiency was clipped at a low level.

AB - The nonresonant two-photon absorption ~TPA! coefficient in silver selenogallate (AgGaSe2) crystals was measured for both ordinary and extraordinary polarizations in the 1300–1600xy1nm wavelength range. We found a cutoff wavelength for the TPA at between 1400 and 1500 nm, which corresponds to half of the bandgap energy of the AgGaSe2 crystal. Below the cutoff wavelength we measured the TPA coefficient to be approximately 0.035 cmyMWfor the extraordinary polarization and two to three times lower for the ordinary polarization. We compared the AgGaSe2 samples from two manufacturers and observed a factor of 2 difference in the TPA coefficients. Because of the high TPA, the 1.32-μm pumped AgGaSe2 optical parametric oscillator conversion efficiency was clipped at a low level.

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DO - 10.1364/AO.40.002490

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Limited efficiency of a silver selenogallate optical parametric oscillator caused by two-photon absorption

Abstract

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