Spectroscopy of the Harmonics of Submillimeter Backward Wave Oscillators

✍ Scribed by M.Y. Tretyakov; A.F. Krupnov

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 280 KB
• Volume: 172
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1995.1167

✦ Synopsis

The harmonics content in the radiation generated by a submillimeter backward wave oscillator is described for the first time. Lines were observed in the second and third harmonic using an acoustic cell as a receiver in the (600-\mathrm{GHz}) frequency range. A possible explanation is given for the harmonic generation. It is thought that strong enough electron bunching induces nonsinusoidal convection currents in slow-wave systems. This is analogous to frequency multiplication in centimeter-wave klystrons. Possible means for reaching higher frequencies using more sensitive receivers such as cryogenic bolometers and changing construction and/or operational regimes of oscillators are pointed out. (c) 1995 Academic Press, Inc