Title :
Continuous wave THz generation based on a dual-frequency laser and a LTG - InGaAs photomixer
Author :
Czarny, R. ; Alouini, M. ; Marcadet, X. ; Bansropun, S. ; Doualan, J.L. ; Moncorge, R. ; Lampin, J.F. ; Krakowski, M. ; Dolfi, D.
Author_Institution :
Thales Res. & Technol., Palaiseau
Abstract :
We demonstrate a high-spectral-purity continuous-wave terahertz source, using a diode pumped Yb3+:CaF2 dual frequency laser. THz radiation is generated by photomixing the two frequencies in a low-temperature grown In. 23Ga. 77As photoconductor, doped with Be, and loading a spiral antenna. The frequency difference between the two optical modes is tuneable by step from d. c. to 2 THz. A maximum laser power of 215 mW CW has been obtained with a beatnote-linewidth narrower than 30 kHz. Measurements show a tuneable THz emission with a maximum output power in the order of few tens nW.
Keywords :
III-V semiconductors; beryllium; calcium compounds; gallium arsenide; indium compounds; microwave photonics; optical frequency conversion; solid lasers; spiral antennas; submillimetre wave generation; ytterbium; 2 THz; 215 mW; CaF2:Yb3+; In0.23Ga0.77As:Be; LTG-InGaAs photomixer; beryllium; continuous wave THz radiation generation; diode pumped Yb3+:CaF2 dual frequency laser; high-spectral-purity continuous-wave terahertz source; low-temperature grown In0.23Ga0.77As photoconductor; spiral antenna; Diodes; Frequency; Indium gallium arsenide; Laser excitation; Laser modes; Laser tuning; Photoconductivity; Pump lasers; Spirals; Tunable circuits and devices; THz antenna; THz generation; dual frequency laser; photomixing;
Conference_Titel :
Microwave Photonics, 2006. MWP '06. International Topical Meeting on
Conference_Location :
Grenoble, France
Print_ISBN :
1-4244-0203-4
Electronic_ISBN :
1-4244-0204-2
DOI :
10.1109/MWP.2006.346534
