Precise terahertz-wave phase measurement based on photonics technology

Author

Hisatake, Shintaro ; Nagatsuma, Tadao

Author_Institution

Grad. Sch. of Eng. Sci., Osaka Univ., Toyonaka, Japan

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

We demonstrate that the photonics-based balanced self-heterodyne system enables us to measure the phase change of the continuous terahertz-wave with the theoretical uncertainties limited by the signal-to-noise ratio (SNR) of the amplitude measurement. Although our system is based on free-running lasers and fiber components, excess phase noise can be cancelled out. When the SNR was 44 dB, the standard deviation of the phase measurement was 0.37 degree, which is 10 times better than the previous method.

Keywords

heterodyne detection; laser noise; phase measurement; phase noise; semiconductor lasers; terahertz wave generation; amplitude measurement; continuous terahertz-wave; excess phase noise; fiber components; free-running lasers; phase change measurement; photonics technology; photonics-based balanced self-heterodyne system; precise terahertz-wave phase measurement; signal-to-noise ratio; Optical fibers; Optical mixing; Optical noise; Phase measurement; Phase noise; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956291

Filename

6956291