The application of multiplex spectrometry to cryogenically cooled LWIR extrinsic photodetectors is limited by system noise. This noise limitation results in a detector NEP that is directly proportional to bandwidth. Therefore, multiplex schemes that require increased bandwidth are not productive of real advantage. However, doubly encoded systems that are based on 2n − 1 or n + N − 1 measurements have the potential to provide a real throughput gain proportional to the number of elements used on the throughput matrix.
© 1974 Optical Society of America
Original Manuscript: May 9, 1974
Published: November 1, 1974
Clair L. Wyatt and Roy W. Esplin, "Multiplexed Dispersive Spectrometers Using Reduced Background Infrared Detectors," Appl. Opt. 13, 2651-2653 (1974)