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Optics Letters

Optics Letters


  • Vol. 21, Iss. 3 — Feb. 1, 1996
  • pp: 213–215

30-THz upconversion of an AlGaAs diode laser with AgGaS2: bridging the several-terahertz frequency gap in the near infrared

D. Touahri, O. Acef, and J.-J. Zondy  »View Author Affiliations

Optics Letters, Vol. 21, Issue 3, pp. 213-215 (1996)

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We report as much as 6-μW upconverted cw radiation at λ = 778 nm from the sum-frequency mixing of a 50-mW diode laser at λ = 842 nm and a 200-mW CO2 laser at λ = 10.2 μm by use of a 15-mm-long silver thiogallate crystal. This nonlinear material provides a convenient connection between IR and visible/near-IR optical standards. We describe simple frequency chains based on this upconversion process that permit the absolute frequency measurement of many visible or near-IR possible standards at the 10−12 accuracy level. Transposition of terahertz-scale frequency-difference measurements from the near IR to the 10-μm domain is also proposed.

© 1996 Optical Society of America

Original Manuscript: June 26, 1995
Published: February 1, 1996

D. Touahri, O. Acef, and J.-J. Zondy, "30-THz upconversion of an AlGaAs diode laser with AgGaS2: bridging the several-terahertz frequency gap in the near infrared," Opt. Lett. 21, 213-215 (1996)

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  1. R. Felder, D. Touahri, O. Acef, L. Hilico, J.-J. Zondy, A. Clairon, B. de Beauvoir, F. Biraben, L. Julien, F. Nez, Y. Millerioux, Proc. SPIE 2378, 52 (1995).
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