Integrated, Heterodyne Array Receivers for FIR Spectroscopy
Abstract
While the possibility of large format (~100 pixel) spectroscopic imaging cameras at submillimeter wavelengths has been discussed for more than two decades, only recently have advances in mixer technology, device fabrication, micromachining, LO sources, and digital signal processing made the construction of such an instrument possible both technically and fiscally. Here we present a design concept for a compact, heterodyne camera for SOFIA capable of providing low-noise, high spectral resolution operation up to ~10 THz (30 microns). The focal plane array utilizes micromachined, waveguide mixers with membrane-mounted HEBs. Due to the resistive nature of HEBs and the use of a wideband, waveguide mount, the bandwidth of the array mixers should be >30%. Recent advances in HEB performance using new materials suggest that significantly lower noise operation than presently obtained is possible. The array backend spectrometer could utilize array AOSs or new generation correlator technology.
- Publication:
-
Far-IR, Sub-mm & MM Detector Technology Workshop
- Pub Date:
- 2002
- Bibcode:
- 2002fism.workE..81W