Error Correction Coding for Long Haul Optical Systems and Optical Access Network

Students: Meer Sakib (PhD) and Monireh Moayedi(PhD)

There is a consensus that deploying advanced error-correction technologies such as low-density parity check (LDPC) codes in optical links is one of the most cost-effective methods to combat system impairments. Although LDPC codes can be very powerful in theory, their practical implementation for optical communications links at ultra-high data rates remains a challenge since the decoding of the code requires complex structures and a large silicon area for integrated on-chip products. My present work focuses on the development of an optical front-end for the practical implementation of these codes.
Specifically, the investigation my investigation include: i) Development and simulation of suitable LDPC error correction codes for next-generation optical networks, ii) Analysis of the impairments of the fiber distributed system on decoding performance, and iii) FPGA implementation of the coder/decoder modules.


Fig. Output of the soft decision circuit (Source: M. Sakib, V. Mahalingam, W. Gross and O. Liboiron-Ladouceur, "Optical Front-end for Soft Decision LDPC Codes in Optical Communication Systems," IEEE/OSA Journal of Optical Communications and Networking (JOCN), Vol. 3, No. 6, pp. 533-541, June 2011 (Top downloaded paper in June/July in JOCN, selected for the “Spot Light in Optics” publication).

February 2014

  • Meet Prof. Liboiron-Ladouceur and her student Peicheng Liao who will be at OFC 2014 presenting our recent paper from the RODIN project: "Gain Effect on the Scalability of SOA-based Optical Space Switches" (paper M3E.5).

    September 2013

    • We wish the best to our team members Xi Lu who graduated with an M.Eng now working at Ciena and Postdoc Mehrdad Mirshafiei now with the R&D team at Ericsson.

      August 2013

      • Meet Prof. Liboiron-Ladouceur at ECOC 2013 in London where she will present on September 25 "A Compact Silicon-on-Insulator Optical Hybrid for Low Loss Integration with Balanced Photodetectors," paper We.2.B.2.

      June 2013

      • Meet one of our Photonic DataCom team members at the IEEE Summer Topicals this summer in July were we will present our recent work. Prof. Liboiron-Ladouceur is also giving an invited presentation at Photonics in Switching on July 5th in Kyoto, Japan.

      September 2012

      • The Photonic DataCom team presented two papers (WM4 and TuI3) at the IEEE Photonics Society Conference in San Francisco next September.

      Summer 2012

      • Professor Liboiron-Ladouceur is Chapter Chair of the IEEE Photonics Society. For information about local events go to website

      • The Photonic DataCom team presented three papers at the SPIE Photonics North Conference in Montreal.

      May 2012

      • We congratulate Mr. Meer Sakib for receiving the SPIE Graduate Scholarship.

      February 2012

      • Our project RODIN was awarded the Premio Venezia from the Italian Chamber of Commerce in Canada honouring excellence in collaborations between Quebec and Italy.

      October 2011

      • Professor Liboiron-Ladouceur has been awarded a Canada Research Chair in Photonic Interconnects

      • The Photonic DataCom team presented three papers at the IEEE Photonics Conference in Arlington, VA (Oct. 9-13)

      September 2011

      • We wish the best to Mr. Venkat Mahalingam (M.Eng. 2011) who is now working at Telus in Montreal as a network design engineer

      August 2011

      • We congratulate Mr. Meer Sakib for receiving the Vanier Canada Graduate Scholarship