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1 A Novel FBG-Based Self-Seeded RSOA Transmitter with Noise Mitigation for Dense SS-WDM PONs Ziad A. El-Sahn, Walid Mathlouthi, Habib Fathallah, Sophie LaRochelle, and Leslie A. Rusch Centre d Optique, Photonique et Laser (COPL), ECE Dept., Université Laval, Sainte-Foy, QC G1K 7P4, Canada. ziad.elsahn@mail.mcgill.ca November 10, 2010 Presentation Outline and Motivation PON Physical The proposed self-seeded RSOA transmitter Receiver selection for noise mitigation Dense SS-WDM over the existing PON infrastructure Setup and Summary and November 10,
2 Existing and Future PONs Requirements for Future PONs: higher bit rates, bandwidth-intensive and video-oriented applications, symmetric services Challenges and Main Objectives: Exploit the existing PON infrastructure Simple and inexpensive solutions using existing components May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 3 Dense SS-WDM PONs Next Generation Dense SS-WDM PON The use of incoherent sources + low-cost WDM equipment Exploiting the noise cleaning RSOA transmitters RSOAs as Colorless ONU Transmitters Direct Filtering Self-Seeding RSOA BPF Low Power Power spectral density ASE Direct filtering Wavelength High Power May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 4 2
3 The proposed Transmitter Self-Seeded RSOA Tx Proof of Concept Tx Noise Cleaning Self- Seeding 1 dbm output p% FBG Characteristics: - Bandwidth ~ 35 GHz - Reflectivity: optimized - Group delay: linear May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 5 Receiver Selection Degenerate Rx Conventional Rx Transmission [db] Balanced Rx May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 6 3
4 Proposed Dense SS-WDM PON 1 x N Coupler 1 x N Coupler FP Laser CWDM PD TDM ONU The balanced receiver has already been proposed by W. Mathlouthi et al., High-Bit-Rate dense SS-WDM PON using SOAbased noise reduction with a novel balanced detection, IEEE J. Lightwave Technol., November May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 7 Demonstration Self-Seeded RSOA Tx Balanced Rx -7 Sensitivity [dbm] The optimum depends on the RSOA characteristics and the channel BW Output ~ 4.5 dbm BER = 10-9 BER = FBG reflectivity [%] May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 8 4
5 Uplink BER Performance 10 km 20 km 60 mv/div, 200 ps/div Capacity* 10 km 16, 128 (FEC) 20 km N/A, 64 (FEC) * MITEQ Amplifier AM-1300 (NF = 1.6 db) was used for the calculation May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 9 Summary and We proposed a p% reflective FBG-based self-seeded RSOA transmitter and optimized its performance (p = 18 ± 2%) to achieve noise cleaning and high output power (4.5 dbm) Our combined RSOA/BR approach confirmed that noise mitigation is preserved We showed that our strategy is best targeted as an innovative method for gradually upgrading existing PONs We demonstrated that the RSOA/BR combination offers tight wavelength packing (dense WDM) Despite the high splitting losses at the RN, our solution achieves higher spectral efficiency than that of traditional AWG-based SS-WDM PONs May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 10 5
6 Thank you November 10, 2010 BER Performance (DDF = 0 km) Backup Slide Gb/s RSOA FBG 18% 10 km 20 km 60 mv/div, 200 ps/div Capacity* 10 km 32, 128 (FEC) 20 km 8, 128 (FEC) * MITEQ Amplifier AM-1300 (NF = 1.6 db) was used for the calculation May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 12 6
7 Noise Cleaning and Wavelength Dependence Backup Slide 2 Setup DC RSOA 2% tap BPF VOA BBS BPF 1 EDFA May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 13 BER Performance (Proof of Concept) Backup Slide 3 ERROR FREE Without a CSF, 20 km of propagation without DCF is possible for a 55 GHz channel at 1.25 Gb/s May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 14 7
8 Wavelength Coverage Backup Slide 4 Back-to-Back BER Performance Post-filtering Effect Proof of Concept Tx BER May 26, 2011 IEEE LEOS Annual Meeting 2010, Denver, Colorado, USA 15 8
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