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Photonics 2015, 2(4), 1152-1163; doi:10.3390/photonics2041152

InP-Based Waveguide Triple Transit Region Photodiodes for Hybrid Integration with Passive Optical Silica Waveguides

Department of Optoelectronics/ZHO, University of Duisburg-Essen, Lotharstr. 55, Duisburg 47057, Germany
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Received: 15 October 2015 / Revised: 24 November 2015 / Accepted: 3 December 2015 / Published: 7 December 2015
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Abstract

We report on a novel InP-based 1.55 μm waveguide triple transit region photodiode (TTR-PD) structure for hybrid integration with passive optical silica waveguides. Using the beam propagation method, numerical analyses reveal that, for evanescent optical coupling between a passive silica waveguide and the InP-based waveguide TTR-PD, a coupling efficiency of about 90% can be obtained. In addition to that, an absorption of about 50% is simulated within a TTR-PD length of 30 µm. For fabricated TTR-PD chips, a polarization dependent loss (PDL) of less than 0.9 dB is achieved within the complete optical C-band. At the operational wavelength of 1.55 µm, a reasonable PDL of 0.73 dB is measured. The DC responsivity and the RF responsivity are achieved on the order of 0.52 A/W and 0.24 A/W, respectively. Further, a 3 dB bandwidth of 132 GHz is experimentally demonstrated and high output-power levels exceeding 0 dBm are obtained. Even at the 3 dB cut-off frequency, no saturation effects occur at a photocurrent of 15.5 mA and an RF output power of −4.6 dBm is achieved. In addition to the numerical and experimental achievements, we propose a scheme for a hybrid-integrated InP/silicon-based photonic millimeter wave transmitter. View Full-Text
Keywords: photonic integrated circuits; silicon photonics hybrid integration; heterogeneous integration; indium phosphide photonics; silica and silicon nitride photonics; optical interconnects; telecommunications; microwave photonics photonic integrated circuits; silicon photonics hybrid integration; heterogeneous integration; indium phosphide photonics; silica and silicon nitride photonics; optical interconnects; telecommunications; microwave photonics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Rymanov, V.; Khani, B.; Dülme, S.; Lu, P.; Stöhr, A. InP-Based Waveguide Triple Transit Region Photodiodes for Hybrid Integration with Passive Optical Silica Waveguides. Photonics 2015, 2, 1152-1163.

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