Abstract
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.
Original language | English |
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Pages (from-to) | 213-215 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 21 |
Issue number | 3 |
DOIs | |
Publication status | Published - Feb 1 1996 |
Externally published | Yes |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics