GHz modulation of tunable THz radiation from photomixing at 1.55 µm

Author

Mangeney, J. ; Martin, M. ; Crozat, P. ; Chassagneux, Y. ; Colombelli, R. ; Vivien, L. ; Blary, K. ; Lampin, J.F.

Author_Institution

IEF, Univ Paris-Sud, Orsay, France

fYear

2009

fDate

21-25 Sept. 2009

Firstpage

1

Lastpage

2

Abstract

We report the transfer of a GHz modulation from an optical carrier at telecom wavelengths to a free space THz beam. THz radiation-tunable from 300 GHz to 1.2 THz- is generated by mixing two telecom lasers with an offset frequency in an ultrafast In_0.53Ga_0.47As photoconductive device coupled to a broadband antenna. A maximum modulation rate of 20 GHz has been achieved, and the bandwidth is independent of the carrier frequency.

Keywords

III-V semiconductors; antennas; gallium arsenide; high-speed optical techniques; indium compounds; laser tuning; microwave photonics; optical communication equipment; optical modulation; photoconducting devices; GHz modulation; In_0.53Ga_0.47As; broadband antenna; carrier frequency; free space THz beam; frequency 300 GHz to 1.2 THz; high-speed modulation; optical carrier; photomixing; telecom lasers; telecom wavelengths; tunable THz radiation; ultrafast photoconductive device; wavelength 1.55 mum; Broadband antennas; Frequency; Laser beams; Optical coupling; Optical mixing; Optical modulation; Photoconducting devices; Telecommunications; Tunable circuits and devices; Ultrafast optics;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on

Conference_Location

Busan

Print_ISBN

978-1-4244-5416-7

Electronic_ISBN

978-1-4244-5417-4

Type

conf

DOI

10.1109/ICIMW.2009.5325656

Filename

5325656