Title :
A DC-coupled, high sensitivity bolometric detector system for the infrared telescope in space
Author :
Devlin, M. ; Lange, A.E. ; Wilbanks, T. ; Sato, S.
Author_Institution :
Dept. of Phys., California Univ., Berkeley, CA, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
The performance of an AC bridge readout system that has been developed for use on the infrared telescope in space is described. The AC bridge readout provides excellent DC stability, allowing observing strategies well suited to spaceborne observations. The ability to modulate the optical signal slowly allows the use of highly sensitive, long time-constant bolometers. At 300 mK, the bolometers have an electrical noise equivalent power of 3×10-17 W/√Hz. The total noise of the differential signal, including amplifier noise, is less than 8×10-17 W/√Hz at frequencies as low as 35 mHz
Keywords :
astronomical instruments; astronomical telescopes; bolometers; bridge instruments; infrared astronomy; infrared detectors; 300 mK; 35 mHz; AC bridge readout system; DC-coupled; electrical noise equivalent power; high sensitivity bolometric detector; infrared telescope; long time-constant bolometers; Bolometers; Bridges; Detectors; Differential amplifiers; Optical modulation; Optical noise; Optical sensors; Stability; Stimulated emission; Telescopes;
Journal_Title :
Nuclear Science, IEEE Transactions on
