Title :
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
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 In0.53Ga0.47As 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; In0.53Ga0.47As; 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;
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
DOI :
10.1109/ICIMW.2009.5325656
