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High-Speed Miniaturized Photodiode and Parallel-Fed Traveling-Wave Photodetectors Based on InP

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5 Author(s)
Beling, A. ; Fraunhofer Inst. for Telecommun., Heinrich-Hertz-Inst., Berlin ; Bach, H.-G. ; Mekonnen, G.G. ; Kunkel, R.
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A periodic parallel-fed traveling-wave photodetector (TWPD) with monolithically integrated power splitter is presented. The device exhibits an impedance match to the 50-Omega environment as well as a velocity match between the optical and electrical signals and shows a 3-dB bandwidth up to 85 GHz. The electrical output power reaches +10 dBm at 10 GHz. The device is based on evanescently coupled low-capacitance waveguide-integrated p-i-n photodiodes (PDs) with optimized optical matching layer which reveal a bandwidth of 145 GHz when employed as a stand-alone photodetector

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:13 ,  Issue: 1 )