Title :
Development of a low noise heterodyne receiver at 3THz
Author :
Irimajiri, Yoshihisa ; Kawakami, Akira ; Morohashi, Isao ; Sekine, Norihiko ; Ochiai, Satoshi ; Tanaka, Shukichi ; Hosako, Iwao ; Yasui, Motoaki
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Tokyo, Japan
Abstract :
A Low noise superconducting heterodyne receiver at 3THz is developing for atmospheric or astronomical observations. A NbN HEB(Hot Electron Bolometer) with quasi optical planar (spiral or log-periodic) antenna and a THz-QCL(Quantum Cascade Laser) which is used as a local oscillator are fabricated in our laboratory. The receiver noise temperature in double sideband of ~2800K which is around 19 times of quantum limit is measured.
Keywords :
bolometers; hot carriers; log periodic antennas; niobium compounds; planar antennas; quantum cascade lasers; spiral antennas; superconducting mixers; NbN; THz-QCL; astronomical observations; atmospheric observations; frequency 3 THz; hot electron bolometer; local oscillator; log-periodic antenna; low noise superconducting heterodyne receiver; quantum cascade laser; quasi optical planar antenna; receiver noise temperature; spiral antenna; Measurement by laser beam; Mixers; Noise; Noise measurement; Quantum cascade lasers; Receivers; Temperature measurement;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6380478
