1. Development of a low noise heterodyne receiver at 3THz
- Author
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Motoaki Yasui, Isao Morohashi, Shukichi Tanaka, Iwao Hosako, Norihiko Sekine, Akira Kawakami, Yoshihisa Irimajiri, and Satoshi Ochiai
- Subjects
Physics ,Noise temperature ,Sideband ,business.industry ,Quantum limit ,Local oscillator ,Superheterodyne receiver ,Bolometer ,Astrophysics::Instrumentation and Methods for Astrophysics ,Physics::Optics ,law.invention ,Optics ,law ,Optoelectronics ,Antenna (radio) ,business ,Quantum cascade laser - 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. more...
- Published
- 2012
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