Title :
Performance evaluation of phase-locking for THz-QCL
Author :
Yoshihisa Irimajiri;Motohiro Kumagai;Isao Morohashi;Akira Kawakami;Shigeo Nagano;Norihiko Sekine;Satoshi Ochiai;Shukichi Tanaka;Yuko Hanado;Yoshinori Uzawa;Iwao Hosako
Author_Institution :
NICT: National Institute of Information and Communications Technology, Tokyo, Japan
Abstract :
We are developing a low noise superconducting heterodyne receiver based on a hot electron bolometer mixer (HEBM) and a THz Quantum Cascade Laser (THz-QCL) as a local oscillator at 3THz for atmospheric and astronomical observations. The best value of the uncorrected receiver noise temperature of 1,200 K (DSB) which corresponds to 8 times quantum limit was achieved. We demonstrated phase-locking of a 3 THz-QCL using the HEBM and evaluated its performance.
Keywords :
"Quantum cascade lasers","Frequency measurement","Mixers","Harmonic analysis","Receivers","Phase locked loops","Yttrium"
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on
Electronic_ISBN :
2162-2035
DOI :
10.1109/IRMMW-THz.2015.7327923
