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Ultra-wide-band traveling-wave photodetectors for photonic local oscillators

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6 Author(s)
Stohr, A. ; Univ. Duisburg-Essen, Duisburg, Germany ; Malcoci, Andrei ; Sauerwald, A. ; Mayorga, I.C.
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This paper reviews recent advances in the development of high-speed 1.55-μm traveling-wave p-i-n photodetectors (TWPD) for photonic millimeter-wave and submillimeter-wave local oscillators. We first discuss the basic physics and performances of high-speed 1.55-μm TWPD. Next, we present a frequency-domain optical-heterodyne measurement technique for ultra-wide-band characterization of the TWPD and photonic transmitter modules within the frequency range from almost dc up to more than 1 THz. We further demonstrate ultra-wide-band (0.02-0.7 THz) photonic transmitter modules consisting of a high-speed TWPD coupled to a broad-band bow-tie antenna as well as a narrow-band 0.46-THz photonic transmitter module producing output power levels sufficient to operate a superconductor-insulator-superconductor (SIS) astronomical receiver under optimum conditions. Finally, we will report on ultra-wide-band (0.06-1 THz) photonic transmitter modules consisting of high-speed TWPDs coupled to various rectangular metallic waveguides (WR10, WR8, and WR5).

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Lightwave Technology, Journal of  (Volume:21 ,  Issue: 12 )