Continuous Wave Terahertz Systems Based on 1.5 μm Telecom Technologies

Sartorius, B.; Stanze, D.; Göbel, Thorsten; Schmidt, D.; Schell, Martin

doi:10.1007/s10762-011-9849-7

Cited by 41 publications

(33 citation statements)

References 26 publications

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“…This uses photonic heterodyne generation both as a source in the transmitter section and to generate a THz local oscillator in the receiver and as such takes full advantage of the high spectral purity of the signal for increased detection sensitivity. By using different source and LO frequencies, the signal is downconverted in the mixer to an RF or microwave intermediate frequency, simplifying recovery of the signal compared to homodyne detection [34]. Possible mixer technologies include Schottky diode mixers, superconductor-insulator-superconductor mixers and hot electron bolometer mixers [35], and LT-InGaAs [15].…”

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confidence: 99%

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: 99%

Telecommunications technology-based terahertz sources

et al. 2010

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“…Depending on the performance of the employed THz system and the desired signal-tonoise ratio faster integration times are possible. Particularly, if more efficient emitters like THz photodiodes would be employed which exhibit significantly higher output powers than photoconductive antennas [23] scan rates in the range of KHz should be feasible.…”

Section: Measurementsmentioning

confidence: 99%

Single Sampling Point Detection of Frequency Modulated Terahertz Waves

Scheller

Kinder²,

Peters

et al. 2011

J Infrared Milli Terahz Waves

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“…Pulsed THz PCAs based on 1550 nm sources allow the implementation of all-fiber THz Time-Domain Spectroscopy (THz-TDS) systems [11][12][13][14][15][16][17][18][19] rivaling the traditional free-space THz systems. All-fiber implementations are less susceptible to optical misalignment, are less cumbersome and, most notably, show lower cost maintaining good performance.…”

Section: Introductionmentioning

confidence: 99%