Frequency lock of an optically pumped FIR ring laser at 803 and 1626 GHz

Authors
Michael, E Lewen, F Gendriesch, R Stutzki, J Winnewisser, G
Citation
E. Michael et al., Frequency lock of an optically pumped FIR ring laser at 803 and 1626 GHz, INT J INFRA, 20(6), 1999, pp. 1073-1083
Citations number
17
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES
ISSN journal
01959271 → ACNP
Volume
20
Issue
6
Year of publication
1999
Pages
1073 - 1083
Database
ISI
SICI code
0195-9271(199906)20:6<1073:FLOAOP>2.0.ZU;2-6
Abstract
We report an automatic frequency control (AFC) for an optically pumped far infrared (FIR) ring laser applicable for high resolution THz sideband spect roscopy by mixing a fraction of the laser power and a harmonic of a phase-l ocked synthesizer on a planar Schottky diode. We achieve a relative frequen cy accuracy of about 0.5 kHz rms at 803 GHz ((NH3)-N-15) and about 1 kHz rm s at 1626.6 GHz (CH2F2) over hours of lock time. The absolute frequency acc uracy is estimated to be about 5 kHz at 1626.6 GHz.