1. Open-source NSE Codes Applied to 40 Gbit/s Soliton Lines KAZUHIRO SHIMOURA Kansai Electric Power Co., Japan ECOC2001 ( Oct. 4, 2001 RAI Congress Centre, Amsterdam,The Netherlands )

2. CONTENTS Q-map method and Open-source Code Simulation Reference System 40 Gbit/s Soliton line design by Q-maps Optimal strength of dispersion management Average-dispersion and signal-power design Merit of the 40 Gbit/s soliton system

3. Nonlinear Schrödinger Equation ( by Akira Hasegawa 1973 ) Chirped Gaussian Pulse Non Linear Linear

4. Split Step Fourier Method ( by Fred Tappert 1971 ) Calculated by Mathematica Ver.4 on Win2000

5. Personal NSE Simulation System

6. Simulation Reference System

7. Q-factor definition for RZ-pulse

8. Dispersion map of the simulation model Dispersion map of the simulation model (Periodical dispersion compensation scheme)

9. Pulse widths vibration in the DM-lines Pulse widths vibration in the DM-lines ( 40Gbit/s, Dc=±20ps/nm, Lc=100km, with 6nm filters ) Global StructureLocal Structure

10. Q-maps for the 40 Gbit/s DM-Soliton Lines (Nc = 2, Pav=+5dBm, La = 50 km, Lt = 3 Mm) Optimal Dispersion Compensation: Dc = ±30 ps/nm Dav – Dc planeDav – Pav plane

11. Nc = 4Nc = 6 Q-maps for the 40 Gbit/s DM-Soliton Lines (Nc = 4/6, Pav=+5dBm, La = 50 km, Lt = 3 Mm) Optimal Dispersion Compensation: Dc = ±30 ps/nm

12. La=30kmLa=80km Q-maps for the 40 Gbit/s DM-Soliton Lines (Nc = 2, Pav=+5dBm, La = 30/80 km, Lt = 3 Mm)

13. La=30kmLa=80km Q-maps for the 40 Gbit/s DM-Soliton Lines (Nc = 2, Pav=+5dBm, La = 30/80 km, Lt = 3 Mm)

14. PMD = 0.1 ps/km 0.5 PMD suppression effect of soliton (Nc = 2, Pav=+5dBm, Dc=+30ps/nm, La = 50km, Lt = 3Mm) PMD = 0 ps/km 0.5

15. Optimal S-parameter for the DM-line ( T. Yu, et. al., 1997 ) k = − ( λ 2 / 2πc ) d = 1.27 D (ps/nm/km) Ts (ps) : FWHM at chirp-free point Dc = ±30 ps/nm, Ts = 6.8 ps  S = 1.65  S = 1.65 ( T. Yu, et. al., 1997 )

16. Results of the 40Gbit/s simulation Dispersion management strength Dc = ±30 ±10 (ps/nm) : for all cases S = 1.65 Signal Power and Dispersion Dav = +0.04 ± 0.02 (ps/nm/km) Pav = +7 ± 2 (dBm) : for La = 50km case

17. Experimental setup of the 80 Gbit/s, 800 km transmission

18. Bit Error Rate for 8*10Gbit/s CH

19. Merit of the soliton-based system For Long distance transmission (Soliton stability effect, High intensity signal and suppressing PMD effect) Conventional DSF without any dispersion slope compensation (Single Wavelength) Narrow band low cost amplifier with Band pass filter is available. Dispersion design is simple (Dc= ±30ps/nm) Low cost High capacity system is possible.

20. You can download some code http://www.asahi-net.or.jp/~ix6k-smur/soliton.html