Polarization-Independent Coherent Real-Time Analog Receiver for PON Access Systems

• Published in: Journal of lightwave technology Vol. 34; no. 8; pp. 2027 - 2033
• Main Authors: Artiglia, Massimo, Presi, Marco, Bottoni, Fabio, Rannello, Mario, Ciaramella, Ernesto
• Format: Journal Article
• Language: English
• Published: New York IEEE 15-04-2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Optical Access Network; Optical Coherent Detection; Optical Communication Equipment; Optical Fiber Communications; Optical Fiber Networks; Optical fibers; Optical polarization; Optical receivers; Optical sensors; Passive optical networks; Optical access network; optical fiber networks; optical coherent detection; optical communication equipment; optical fiber communications
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2016.2519139

A 1.25-Gb/s ASK passive optical network (PON) system with a -51 dBm pre-FEC sensitivity (at BER = 2 × 10 -3 ) is enabled by a real-time polarization-independent coherent receiver (PI-RX) that needs no DSP (nor ADC). The receiver, which only makes use of common DFBs and commercially available electronic ICs, is targeted for use on a 6.25-GHz UD-WDM grid and has a 52-dB dynamic range. Measurements of the robustness of the PI-RX against backreflections and crosstalk from coexistent adjacent channels show that this preliminary implementation is suitable for UD-WDM-PON systems with frequency spacing down to 5 GHz.