Title :
Continuous Wave Terahertz Generation From Ultra-Fast InP-Based Photodiodes
Author :
Rouvalis, Efthymios ; Renaud, Cyril C. ; Moodie, David G. ; Robertson, Michael J. ; Seeds, Alwyn J.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. Coll. London, London, UK
fDate :
3/1/2012 12:00:00 AM
Abstract :
We present theoretical analysis and experimental results for an optimized Traveling Wave Uni-Traveling Carrier Photodiode for continuous wave millimeter-wave and Terahertz generation. The devices employed a mode-converting waveguide for efficient coupling from a lensed fiber. A DC responsivity of 0.53 A/W at a wavelength of 1.55 μm and 3-dB electrical bandwidth of 108 GHz were obtained from temperature-controlled coplanar waveguide-integrated devices together with record levels of power from a photomixer in the millimeter-wave range with 1 mW at 200 GHz. High levels of Terahertz output power from broadband, heat sink-mounted antenna-integrated devices were measured with 5 μW at 1.02 THz.
Keywords :
broadband antennas; coplanar waveguides; millimetre wave mixers; photodiodes; terahertz wave devices; terahertz wave generation; travelling wave tubes; DC responsivity; InP; continuous wave millimeter-wave generation; continuous wave terahertz generation; electrical bandwidth; frequency 1.02 THz; frequency 108 GHz; frequency 200 GHz; heat sink-mounted antenna-integrated device; lensed fiber; mode-converting waveguide; optimized traveling wave unitraveling carrier photodiode; photomixer; power 1 mW; power 5 muW; temperature-controlled coplanar waveguide-integrated device; terahertz output power; ultra-fast photodiode; wavelength 1.55 mum; Antenna measurements; Broadband antennas; Frequency measurement; Optical mixing; Optical waveguides; Power measurement; Probes; Photodetectors; Terahertz; photomixing; submillimeter-wave generation;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2011.2178858
