Title :
Photonic generation of continuous THz wave using uni-traveling-carrier photodiode
Author :
Ito, Hiroshi ; Furuta, Tomofumi ; Nakajima, Fumito ; Yoshino, Kaoru ; Ishibashi, Tadao
Author_Institution :
Nippon Telegraph & Telephone, NTT Corp., Kanagawa, Japan
Abstract :
A uni-traveling-carrier photodiode (UTC-PD) is monolithically integrated with a wideband log-periodic toothed antenna for generating millimeter and submillimeter waves at frequencies of up to terahertz range. A module with a quasi-optical output port fabricated for practical use operates up to 1.5 THz and generates an output power of 2.3 μW at 1.04 THz with good linearity. The output power level and the operation frequency are records for wideband PD modules operating at 1.55 μm. An investigation of the operational characteristics of the UTC-PD reveals that the effective use of the electron-velocity overshoot in the junction depletion layer is important for maximizing the output power in the terahertz range.
Keywords :
antennas; integrated optoelectronics; microwave photonics; monolithic integrated circuits; photodiodes; submillimetre wave generation; 1.04 THz; 1.55 mum; 2.3 muW; THz wave generation; continuous wave generation; electron-velocity overshoot; junction depletion layer; log-periodic toothed antenna; millimeter wave generation; monolithic integration; photonic generation; quasioptical output port; submillimeter wave generation; unitraveling-carrier photodiode; wideband antenna; Bandwidth; Broadband antennas; Frequency; Indium phosphide; Indium tin oxide; Optical devices; Photodiodes; Power generation; Signal generators; Submillimeter wave propagation; Electron-velocity overshoot; planar antenna; quasi-optical output module; semiconductor heterojunction; submillimeter-wave generation; uni-traveling-carrier photodiode (UTC-PD);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.858221
