2010 20th International Crimean Conference "Microwave & Telecommunication Technology", 2010
A 150 Mbps PDIC (Photo Diode Integrated Circuit) BiCMOS optical receiver is presented in the repo... more A 150 Mbps PDIC (Photo Diode Integrated Circuit) BiCMOS optical receiver is presented in the report. The receiver is intended to be used in the MOST150 (Media Oriented System Transport) network with POF (Plastic Optical Fiber), diameter 1 mm wavelength 650nm. A fast optical front end receiver is developed based on XFAB BiCMOS technology. The fully differential receiver consists of two integrated photo diodes with 1.1mm diameter, transimpedance amplifier, postamplifier and output LVDS driver. The block diagram, chip layout and measurement results of the engineering samples are shown. Receiver is available in two types of the package SOIC and SIP.
2013 International Symposium on Intelligent Signal Processing and Communication Systems, 2013
ABSTRACT Large core, Step-Index Plastic Optical Fiber (SIPOF) is a cheap alternative to existing ... more ABSTRACT Large core, Step-Index Plastic Optical Fiber (SIPOF) is a cheap alternative to existing copper network interconnects. The low material, production and installation costs come at the price of large values of attenuation and intermodal dispersion for fibers reaching beyond 50 m. For a 150 m, 150 Mb/s link, the dispersion induced optical power penalty can be as large as 13 dB. Combined with a nominal attenuation of up to 0.22 dB/m, the signal drops under the sensitivity levels of current POF receivers. A non-intrusive solution to this problem could be receiver side electronic equalization. To ease integration with existing receivers and keep power consumption low, an analog implementation is proposed. As the optical channel does not behave like any low order electrical system, the design of an electrical filter with a fully matched response could result in a very complex system. Therefore, the performance of a general, low order, electrical filter was evaluated and compared with the theoretical case of full equalization in high level simulations. Based on these results, a 2 biquad adaptive gm-C filter was designed and implemented in a blind adaptive equalizer. The filter allows for individually tunable low and high frequency gain, enabling equalization of a 150 Mb/s link for fiber lengths ranging from 1 to 150 m.
CAS 2013 (International Semiconductor Conference), 2013
ABSTRACT The use of PolyMethylMethAcrylate, Step Index Plastic Optical Fiber (PMMA-SI-POF) channe... more ABSTRACT The use of PolyMethylMethAcrylate, Step Index Plastic Optical Fiber (PMMA-SI-POF) channels for high speed data communications is impeded by its intrinsic large intermodal dispersion. The resulting Inter-Symbol-Interference (ISI) makes the successful data recovery at the optical receiver a daunting task. One possible approach to mitigate the ISI problem is the use of an electrical equalization filter to be placed after the Optical-Electrical Conversion block (OEC). To serve this purpose, a 2 biquad, CMOS gm-C filter with individually tunable low and high frequency gain is presented. As the equalization should be independent of fiber length and variation prone OEC characteristics, the filter's tuning range needs to be sufficiently large to accommodate for fiber lengths up to 150 m and OEC bandwidths down to 100 MHz. The presented filter consists of 2 stages; the first has a fixed bandwidth of 150 MHz and a DC gain range of 26 dB. The second stage implements 0 to 24 dB additional signal boosting in a frequency band centered at 110 MHz, which enables the overall system bandwidth to be placed at approximately 100 MHz. The filter was used in a fully integrated, adaptive linear feedforward equalizer implemented in a 3.3 V supply, 0.35 μm CMOS process, targetting a 150 Mbps link.
2010 20th International Crimean Conference "Microwave & Telecommunication Technology", 2010
A 150 Mbps PDIC (Photo Diode Integrated Circuit) BiCMOS optical receiver is presented in the repo... more A 150 Mbps PDIC (Photo Diode Integrated Circuit) BiCMOS optical receiver is presented in the report. The receiver is intended to be used in the MOST150 (Media Oriented System Transport) network with POF (Plastic Optical Fiber), diameter 1 mm wavelength 650nm. A fast optical front end receiver is developed based on XFAB BiCMOS technology. The fully differential receiver consists of two integrated photo diodes with 1.1mm diameter, transimpedance amplifier, postamplifier and output LVDS driver. The block diagram, chip layout and measurement results of the engineering samples are shown. Receiver is available in two types of the package SOIC and SIP.
2013 International Symposium on Intelligent Signal Processing and Communication Systems, 2013
ABSTRACT Large core, Step-Index Plastic Optical Fiber (SIPOF) is a cheap alternative to existing ... more ABSTRACT Large core, Step-Index Plastic Optical Fiber (SIPOF) is a cheap alternative to existing copper network interconnects. The low material, production and installation costs come at the price of large values of attenuation and intermodal dispersion for fibers reaching beyond 50 m. For a 150 m, 150 Mb/s link, the dispersion induced optical power penalty can be as large as 13 dB. Combined with a nominal attenuation of up to 0.22 dB/m, the signal drops under the sensitivity levels of current POF receivers. A non-intrusive solution to this problem could be receiver side electronic equalization. To ease integration with existing receivers and keep power consumption low, an analog implementation is proposed. As the optical channel does not behave like any low order electrical system, the design of an electrical filter with a fully matched response could result in a very complex system. Therefore, the performance of a general, low order, electrical filter was evaluated and compared with the theoretical case of full equalization in high level simulations. Based on these results, a 2 biquad adaptive gm-C filter was designed and implemented in a blind adaptive equalizer. The filter allows for individually tunable low and high frequency gain, enabling equalization of a 150 Mb/s link for fiber lengths ranging from 1 to 150 m.
CAS 2013 (International Semiconductor Conference), 2013
ABSTRACT The use of PolyMethylMethAcrylate, Step Index Plastic Optical Fiber (PMMA-SI-POF) channe... more ABSTRACT The use of PolyMethylMethAcrylate, Step Index Plastic Optical Fiber (PMMA-SI-POF) channels for high speed data communications is impeded by its intrinsic large intermodal dispersion. The resulting Inter-Symbol-Interference (ISI) makes the successful data recovery at the optical receiver a daunting task. One possible approach to mitigate the ISI problem is the use of an electrical equalization filter to be placed after the Optical-Electrical Conversion block (OEC). To serve this purpose, a 2 biquad, CMOS gm-C filter with individually tunable low and high frequency gain is presented. As the equalization should be independent of fiber length and variation prone OEC characteristics, the filter's tuning range needs to be sufficiently large to accommodate for fiber lengths up to 150 m and OEC bandwidths down to 100 MHz. The presented filter consists of 2 stages; the first has a fixed bandwidth of 150 MHz and a DC gain range of 26 dB. The second stage implements 0 to 24 dB additional signal boosting in a frequency band centered at 110 MHz, which enables the overall system bandwidth to be placed at approximately 100 MHz. The filter was used in a fully integrated, adaptive linear feedforward equalizer implemented in a 3.3 V supply, 0.35 μm CMOS process, targetting a 150 Mbps link.
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Papers by Olivier Chasles