Title :
Absolute frequency measurement for CW-THz wave using a fs pulse fiber laser and a photoconductive antenna
Author :
Kumagai, Motohiro ; Nagano, Shigeo ; Ito, Hiroyuki ; Ochiai, Satoshi ; Hanado, Yuko
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol. (NICT), Tokyo, Japan
Abstract :
We have started to establish an accurate frequency standard in THz region. At first an absolute frequency measurement system using a femtosecond fiber laser and a photoconductive antenna has been demonstrated for CW-THz wave. In a measurement of a 300GHz wave, we have confirmed that the measurement system has a fractional instability at the 10-16 level at averaging time of over 1000 seconds, corresponding to a frequency resolution of 30μHz.
Keywords :
fibre lasers; frequency measurement; high-speed optical techniques; measurement by laser beam; millimetre wave antennas; CW-THz wave; THz region; absolute frequency measurement; accurate frequency standard; femtosecond pulse fiber laser; fractional instability; frequency 300 GHz; photoconductive antenna; Antenna measurements; Fiber lasers; Frequency measurement; Measurement by laser beam; Optical sensors; Standards; Ultrafast optics;
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.2012.6380318
