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1 September 2004 Waveguide and antenna coupled travelling-wave 1.55-μm photodetectors for optical (sub)millimeter-wave generation
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This paper will report on continuous (sub-)millimetre-wave (cw) generation by photomixing two laser signals at around 1.55μm in ultrafast InAlAs/InGaAs(P) travelling-wave photodetectors (TW-PD). At first TW-PD's are characterised up to 160GHz mm-wave frequency using conventional MMW equipment. Further, photonic THz transmitters with integrated planar slot and bow-tie antenna structures for quasi optical free space coupling will be presented. Resonant slot antenna coupled TW-PD exhibit sufficient power for replacing the 460GHz solid-state-LO of an SIS-based heterodyne receiver while the equivalent device with integrated bow-tie antenna operates in a very broadband frequency range between 20 and 620GHz. Next we report on waveguide coupled TW-PD's and show experimental results in a wide frequency range, up to 1THz. Finally, several low-cost strategies for enhancing the available power as well as the efficiency will be presented.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andrei Malcoci, Andreas Stohr, Andres Sauerwald, Sven Schulz, and Dieter Jager "Waveguide and antenna coupled travelling-wave 1.55-μm photodetectors for optical (sub)millimeter-wave generation", Proc. SPIE 5466, Microwave and Terahertz Photonics, (1 September 2004);

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