Noise tube sources for the far IR and millimeter region

Details Noise tube sources for the far IR and millimeter region Noise tube sources for the far IR and millimeter region

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apopt..27.2078m&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 27, May 15, 1988, p. 2078-2081.

Physics

Optics

Electromagnetic Noise, Far Infrared Radiation, Infrared Spectroscopy, Millimeter Waves, Bolometers, Fourier Transformation, Helium, Irradiance

Scientific paper

The radiant output of a noise tube designed for the 90-140-GHz (3.3-2.1-mm) frequency range has been compared with that from mercury lamps over the wavelength region from 0.4 to about 6 mm. Lamellar grating and Michelson Fourier transform spectrometers were used in conjunction with He cooled bolometers of NEP from 10 to the -12th to 10 to the -14th W/sq rt H2 to measure relative spectral irradiance. With this instrumental arrangement, the radiant power emitted by the noise tube was observed to be less than that from a mercury lamp, at least to a 3-mm wavelength, but it produced less source noise than an ac operated mercury lamp. When the noise tube operating current was reduced, the spectral irradiance peak shifted to longer wavelengths.

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