High Output Power at 110 GHz with a Waveguide Uni-Travelling Carrier photodiode

Renaud, Cyril C.; Moodie, D.G.; Robertson, M.J.; Seeds, A.J.

doi:10.1109/leos.2007.4382641

Cited by 20 publications

(20 citation statements)

References 5 publications

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“…At higher frequencies, PDs with integrated antennas were used, with the power measured using an InSb hot-electron bolometer or a Thomas Keating power meter. In the frequency range 100 to 120 GHz, output powers of 10 to 20 mW have been obtained [17,22], at mean photocurrents of around 30 mA, demonstrating the power handling capabilities of the UTC. The detected power falls rapidly with frequency (at 30 -40 dB/decade), owing to the reduced PD frequency response.…”

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confidence: 84%

Telecommunications technology-based terahertz sources

et al. 2010

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A review is presented of continuous-wave terahertz sources based on the optical heterodyne generation (photomixing) technique, that make use of optical components and fabrication techniques originally developed for the 1550 nm optical fibre telecommunications window. The uni-travelling carrier photodiode is identified as a key component for conversion of optical to terahertz power, and the state of the art is summarised in terms of terahertz power generated at various frequencies. An approach based on phase locking the heterodyned lasers is described, which enables terahertz signals to be generated with extremely high spectral purity and frequency accuracy, and progress in developing the photonic integrated circuits required for its implementation is reported. Finally, possible future developments in the field are discussed.Introduction: The terahertz (THz) band of the electromagnetic spectrum (100 GHz to 10 THz) is of great interest for understanding various chemical, biological, and astronomical phenomena through spectroscopic analysis [1,2], and has a range of technological applications [3], including materials, medical and security imaging and screening [4][5][6], and short-range, high capacity wireless communications [7]. A major impediment to rapid progress in these areas is the lack of availability of compact sources of THz radiation at low cost and with low power dissipation. This is particularly true of high spectral purity, high output power continuous-wave (CW) THz sources [8]. In this Letter, we summarise recent work on CW THz generation by photonic techniques, which leverages the mature, reliable components and fabrication and optical integration techniques that have been developed for optical fibre telecommunications.

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confidence: 84%

Telecommunications technology-based terahertz sources

et al. 2010

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“…Devices with a smaller active area than the optimum saturated at a lower photocurrent level, while larger devices were found to be RC-limited. UTC-PDs are known to have higher saturation power and we believe that for the devices reported here the introduction of a higher series resistance is the main cause for lower measured power than previously reported [14]. For power measurements in the F-band (90-140 GHz) a probe with a WR-8 rectangular waveguide output was used.…”

Section: Single Photodiodesmentioning

confidence: 99%

High-speed photodiodes for InP-based photonic integrated circuits

et al. 2012

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Abstract:We demonstrate the feasibility of monolithic integration of evanescently coupled Uni-Traveling Carrier Photodiodes (UTC-PDs) having a bandwidth exceeding 100 GHz with Multimode Interference (MMI) couplers. This platform is suitable for active-passive, butt-joint monolithic integration with various Multiple Quantum Well (MQW) devices for narrow linewidth millimeter-wave photomixing sources. The fabricated devices achieved a high 3-dB bandwidth of up to 110 GHz and a generated output power of more than 0 dBm (1 mW) at 120 GHz with a flat frequency response over the microwave F-band (90-140 GHz). ©2012 Optical Society of America

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“…Recent work integrated two UTC devices on the same chip and their combined power output showed record high power of 1 mW at 300 GHz [17]. To date, the best results in waveguide based devices have been obtained in work when the standard UTC structure was used in combination with an optimized pseudo TW design [18], [19]. The devices were not full travelling wave structures as this can only be achieved in periodic structures.…”

Section: Uni-travelling Carrier Photodiodementioning

confidence: 99%

TeraHertz Photonics for Wireless Communications

Seeds

Shams

Fice

et al. 2015

J. Lightwave Technol.

316

120

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Optical fibre transmission has enabled greatly increased transmission rates, with 10 Gb/s common in local area networks. End users find wireless access highly convenient for mobile communication. However, limited spectrum availability at microwave frequencies results in per-user transmission rates limited to much lower values, 500 Mb/s for 5 GHz band IEEE 802.11ac, for example. Extending the high data-rate capacity of optical fibre transmission to wireless devices, requires greatly increased carrier frequencies. This paper will describe how photonic techniques can enable ultra-high capacity wireless data distribution and transmission using signals at millimetre-wave and TeraHertz (THz) frequencies.

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High Output Power at 110 GHz with a Waveguide Uni-Travelling Carrier photodiode

Abstract: Abstract-We present a waveguide uni-travelling carrier photodetector with a bandwidth greater than 110 GHz and record breaking power of 10 dBm extracted at 110 GHz.

Cited by 20 publications

References 5 publications

Telecommunications technology-based terahertz sources

Telecommunications technology-based terahertz sources

High-speed photodiodes for InP-based photonic integrated circuits

TeraHertz Photonics for Wireless Communications

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