FIR laser modulation by an external variable reactance
Journal Article
·
· IEEE Trans. Instrum. Meas.; (United States)
- Istituto Elettrotecnico Nazionale, Turin, Italy
Fast frequency modulation of an FIR laser by means of an external variable reactance is presented. In particular, the use of the varactor effect in a micrometer-size Schottky-barrier diode and of the electron density modulation in a cold plasma is considered. Experiments carried out on an optically pumped HCOOH line at 403.7 GHz are described and the results are compared with the theory developed. Peak-to-peak frequency deviation of about 15 kHz and Q-limited bandwidth have been obtained with the varactor effect, whereas the plasma modulator yielded a deviation of 6 kHz and a 20-kHz bandwidth.
- OSTI ID:
- 5709793
- Journal Information:
- IEEE Trans. Instrum. Meas.; (United States), Journal Name: IEEE Trans. Instrum. Meas.; (United States) Vol. IM-29; ISSN IEIMA
- Country of Publication:
- United States
- Language:
- English
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