Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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The Burst Effect Analysis of 2.5 Gb/s TDM-PON Systems Using a SOA Link Extender

반도체광증폭기로 전송거리 확장된 2.5 Gb/s TDM-PON에서 버스트 효과에 의한 신호왜곡 분석

  • 최보훈 (동아대학교 신소재물리학과) ;
  • 이상수 (한국전자통신연구원(ETRI) 광인터넷연구부)
  • Received : 2011.12.05
  • Accepted : 2012.01.30
  • Published : 2012.02.25
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Abstract

A bidirectional TDM-PON link to support 2.5 Gb/s upstream signals of 256 ONUs was considered for an extended transmission distance of 50 km. The power budget of the link was 58 dB for the upstream signal and a SOA was applied as a link extender which had a 25 dB gain. Receiver sensitivity of the upstream signal was -25 dBm for -30 dBm input power to the SOA. When the input power was -10 dBm, pulse overshooting caused by gain transient of the SOA was maximum at 45% and the signal performance degradation gave a power penalty of 1.55 dB for $10^{-12}$ BER. However the penalties diminished rapidly and became negligible as the input power went below -15 dBm. So this input power dynamic range of up to -15 dBm means that it is not positively necessary to use gain control methods for the next generation TDM-PON systems.

256개의 ONU를 수용하며 50 km 전송거리를 갖는 차세대 시분할 수동광망(TDM-PON) 링크에 링크 확장기로 반도체 광증폭기가 적용되었다. 이 광증폭기의 이득은 25dB 였고 입력신호 변화에 따른 이득 자동조정장치는 사용되지 않았다. 상향 링크의 전체 광세기 범위는 58 dB 였고, 광증폭기로의 입력신호가 -30 dBm인 조건에서 링크의 $10^{-9}$ BER을 위한 수신감도는 -25 dBm였다. 그 입력세기가 -10 dBm인 경우 버스트 신호에 의한 증폭기의 이득 과도응답에 의한 초과펄스왜곡은 45% 였고 이로 인한 신호성능의 악화는 $10^{-12}$ BER 에서 1.55 dB의 페널티를 발생시켰다. 그러나 -15 dBm 이하의 입력조건에서는 페널티는 무시할 수준으로 급격히 낮아져서, 링크의 다이나믹 범위가 최소한 -15 dBm 까지는 보장되었다. 이 같이 측정된 입력신호의 다이나믹 범위는 50 km이상 장거리 그리고 수백개 이상의 다수가입자를 지원하는 차세대 수동광망에서 링크 확장기로 광증폭기가 사용되더라도 광증폭기 이득 자동조정장치를 사용하는 것이 필수적이지 않음을 의미한다.

Keywords

References

  1. N. Suzuki and J. Nakagawa, "First demonstration of full burst optical amplified GE-PON uplink with extended system budget of up to 128 ONU splits and 58 km reach," in Proc. ECOC 2005 (Glasgow, UK, 2005), paper Tu 1.3.3.
  2. P. Ossieur, C. Antony, A. M. Clarke, A. Naughton, H.-G. Krimmel, Y. Chang, C. Ford, A. Borghesani, D. G. Moodie, A. Poustie, R. Wyatt, B. Harmon, I. Lealman, G. Maxwell,D. Rogers, D. W. Smith, D. Nesset, R. P. Davey, and P. D. Townsend, "A 135-km 8192-split carrier distributed DWDM-TDMA PON with 2 32 10 Gb/s capacity," J. Lightwave Technol. 29, 463-474 (2011). https://doi.org/10.1109/JLT.2010.2088109
  3. T. B. Gibbon and I. T. Monroy, "Multi-level burst power transient suppression using semiconductor optical amplifiers in gigabit access links," in Proc. ECOC 2008 (Brussels, Belgium, 2008), P.6.13.
  4. ITU-T G.984.6, "Gigabit-capable passive optical networks (GPON): reach extension," Mar. 2008.
  5. K.-I. Suzuki, Y. Fukada, K. Saito, T. Nakanishi, and Y. Maeda, "Burst-mode optical fiber amplifier for PON application," in Proc. ECOC (Glasgow, UK, 2005), Th 2.3.4.
  6. M. Rasztovits-Wiech, A. Stadler, and S. Gianordoli, "Bidirectional EDFA for future extra large passive optical networks," in Proc. ECOC (Cannes, Frances, 2006), Mo4.5.7.
  7. C. Antony, G. Talli, and P. D. Townsend, "SOA based upstream packet equalizer in 10Gb/s extended-reach PONs," in Proc. OFC/NFOEC (San Diego, USA, 2009), OThA5.
  8. S. Pato, R. Meleiro, D. Fonseca, P. Andre, P. Monteiro, and H. Silva, "All-optical burst-mode power equalizer based on cascaded SOAs for 10-Gb/s EPONs," IEEE Photon. Technol. Lett. 20, 2078-2080 (2008). https://doi.org/10.1109/LPT.2008.2006629
  9. R. Bonk, R. Brenot, C. Meuer, T. Vallaitis, A. Tussupov, J. C. Rode, S. Sygletos, P. Vorreau, F. Lelarge, G. H. Duan, H.-G. Krimmel, Th. Pfeiffer, D. Bimberg, W. Freude, J. Leuthold, "1.3 / 1.5 μm QD-SOAs for WDM/TDM GPON with extended reach and large upstream / downstream dynamic range," in Proc. OFC (San Diego, USA, 2009), OWQ1.
  10. Y. Liu, C. W. Chow, C. H. Kwok, H. K. Tsang, and C. Lin, "Optical burst and transient equalizer for 10Gb/s amplified WDM-PON," in Proc. OFC (San Diego, USA, 2009), OThU7.
  11. S. Appathurai, D. Nesset, and R. Davey, "Measurement of tolerance to non-uniform burst powers in SOA amplified GPON systems," in Proc. OFC (Anaheim, USA, 2007), OWS2.
  12. B.-H. Choi and S. S. Lee, "The effect of AWG-filtering on a bidirectional WDM-PON link with spectrum-sliced signals and wavelength-reused signals," Opt. Comm. 284, 5692-5696 (2011). https://doi.org/10.1016/j.optcom.2011.09.007
  13. H. H. Lee, S.-H. Cho, and S. S. Lee, "Efficient excess intensity noise suppression of 100-GHz spectrum-sliced WDM-PON with a narrow-bandwidth seed light source," IEEE Photon. Technol. Lett. 22, 1542-1544 (2010). https://doi.org/10.1109/LPT.2010.2069088
  14. R. Sato, T. Ito, Y. Shibata, A. Ohki, and Y. Akatsu, "40-Gb/s burst-mode optical 2R regenerator," IEEE Photon. Technol. Lett. 17, 2194-2196 (2005). https://doi.org/10.1109/LPT.2005.856364
  15. H. Buchta and E. Patzak, "Analysis of the physical impairments on maximum size and throughput of SOA-based optical burst switching nodes," J. Lightwave Technol. 26, 2821-2830 (2008).
  16. J. T. Ahn, H.-S. Seo, W. J. Chung, B. J. Park, and K. H. Kim, "Characterization of an ASE reflector-based gainclamped erbium-doped fiber amplifier," IEEE Photon. Technol. Lett. 17, 555-557 (2005). https://doi.org/10.1109/LPT.2004.842380