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

Volume

60

Issue

3

fYear

2012

fDate

3/1/2012 12:00:00 AM

Firstpage

509

Lastpage

517

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;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2011.2178858

Filename

6129418