Title :
Generation of CW 0.5 THz radiation by photomixing the output of a two-colour 1.49 μm Fabry-Perot diode laser
Author :
Osborne, S. ; Brien, S.O. ; Reilly, E. P O ; Huggard, P.G. ; Ellison, B.N.
Author_Institution :
Tyndall Nat. Inst., Cork
Abstract :
A compact continuous-wave (CW) terahertz source is demonstrated using a single two-colour laser diode and a photomixer. The 350 mum-long Fabry-Perot laser is constrained to oscillate on non-adjacent cavity modes, at a frequency separation of 485 GHz, by the introduction of features along its ridge waveguide. At a drive current of 155 mA, more than 10 mW of CW power is delivered into a standard singlemode fibre. This radiation drives a waveguide photomixer, which incorporates an InGaAsP photodiode, to emit about 20 nW at the 485 GHz beat frequency.
Keywords :
III-V semiconductors; indium compounds; laser cavity resonators; laser modes; photodiodes; ridge waveguides; semiconductor lasers; submillimetre wave generation; CW THz radiation; Fabry-Perot diode laser; InGaAsP; InGaAsP photodiode; continuous-wave terahertz source; current 155 mA; frequency 485 GHz; non-adjacent cavity modes; photomixing; ridge waveguide; singlemode fibre; two-colour laser diode; waveguide photomixer; wavelength 1.49 mum; wavelength 350 mum;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20083534
