Programmable, Secondary Frequency Standard Based Infrared Synthesizer Using Tunable Lead-Salt Diode Lasers
- 28 November 1983
- proceedings article
- Published by SPIE-Intl Soc Optical Eng
- p. 119-124
- https://doi.org/10.1117/12.937445
Abstract
Quantum phase noise limited Lorentzian power spectral densities were achieved with tunable lead-salt diode lasers. Linewidths as narrow as 22 kHz were observed. A truly programmable infrared synthesizer was produced by frequency-offset-locking the tunable diode lasers to the combination of a stable CO2 (or CO) reference laser and a programmable microwave frequency synthesizer. Absolute frequency accuracy and reproducibility of about ±30 kHz (10-6 cm -) relative to the primary Cs frequency standard may now be obtained with this technique.Keywords
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