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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 13 — Jun. 18, 2012
  • pp: 13939–13946
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Large-scale WDM passive optical network based on cyclical AWG

Zhaowen Xu, Xiaofei Cheng, Yong-Kee Yeo, Xu Shao, Luying Zhou, and Hongguang Zhang  »View Author Affiliations


Optics Express, Vol. 20, Issue 13, pp. 13939-13946 (2012)
http://dx.doi.org/10.1364/OE.20.013939


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Abstract

A large scale wavelength division multiplexed passive optical network is proposed and experimentally demonstrated. 124 bidirectional optical channels with 10-Gb/s downstream and 1.25-Gb/s upstream transmission are simultaneously distributed by a single 32*32 cyclic AWG. The effect of the extinction ratio and seeding power to BER performance are experimentally investigated. The selection of the subcarrier frequency is also analyzed by simulation.

© 2012 OSA

1. Introduction

Today, more and more residents are subscribing to broadband internet access. The rapid increase in the number of new subscribers and the extension of the coverage of the service area may exhaust the wavelength channels of a WDM-PON. To increase the subscriber number, one way is to combine the WDM with time division multiplexing (TDM) technique. However, the TDM technique will reduce the bandwidth for each user and cannot contribute to the system capacity. Another way is to employ more wavelengths. In current WDM-PON implementations, an array waveguide grating (AWG) is used at the remote node (RN) to distribute the wavelength channels for each user. Thus, the total number of wavelength channels assigned is limited by the port count of the AWG. To further increase the wavelength channels, we have proposed to fully utilize all the ports on both sides of the N*N AWG [9

9. Z. Xu, X. Cheng, Y-K. Yeo, L. Zhou, X. Shao, “60-channel bidirectional WDM-PON using a single 32*32 AWGR for 120 wavelengths distribution,” in Proceeding of OFC2011, (Los Angeles, California, 2011), paper JWA65.

] so that we can nearly double the number of wavelength channels.

2. Proposed WDM PON and experimental setup

For a typical WDM-PON remote node, an AWG is used to distribute wavelength channels to each user [11

11. F. Ponzini, F. Cavaliere, G. Berrettini, M. Presi, E. Ciaramella, N. Calabretta, and A. Bogoni, “Evolution scenario toward WDM-PON [Invited],” J. Opt. Commun. Netw. 1(4), C25–C34 (2009). [CrossRef]

13

13. K. Y. Cho, Y. J. Lee, H. Y. Choi, A. Murakami, A. Agata, Y. Takushima, and Y. C. Chung, “Effects of reflection in RSOA-based WDM PON utilizing remodulation technique,” J. Lightwave Technol. 27(10), 1286–1295 (2009). [CrossRef]

]. As a result, the supported user count is limited by the size of the AWG. Figure 1(a)
Fig. 1 Remote node (RN) structure. (a) general case, (b) enhanced case
shows a general RN structure. Here all wavelength channels are launched into the AWG from a same port (e.g. I1). And one (N + 1)*(N + 1) AWG can distribute N + 1 wavelength channels. To increase the user count, we propose to fully use all the 2*(N + 1) ports by launching the optical wavelength channels from two ports located at different sides of the AWG, e.g. I1 and I2 as shown in Fig. 1(b). In this case, 2*N wavelength channels can be distributed by the single cyclic AWG and this nearly double the user count. Here, the optical wavelengths input from I1 and I2 can be located in a same waveband or different waveband. In enhanced RN, another wavelength demultiplexer is used to separate optical signals S1 and S2 before launched into AWG. If the input wavelengths are located in different waveband channels, e.g. S1 is in C band channels and S2 is in L band channels, one simple course WDM coupler can be used to separate them before AWG. While using the same waveband can further increase the user count, for example, both input optical signals (S1 and S2) contain 2*N wavelength channels, half in C band and the others in L band. In this case, the total user count can be increased to 4*N. However, the optical separation of S1 and S2 is difficult since they are mixed in the same WDM channel. In this paper, one optical interleaver is used to combine and separate these signals.

3. Experimental results and discussions

4. Conclusions

References and links

1.

J. Yu, O. Akanbi, Y. Luo, Z. Zong, T. Wang, Z. Jia, and G.-K. Chang, “Demonstration of a novel WDM passive optical network architecture with source-free optical network units,” IEEE Photon. Technol. Lett. 19(8), 571–573 (2007). [CrossRef]

2.

A. Banerjee, Y. Park, F. Clarke, H. Song, S. Yang, G. Kramer, K. Kim, and B. Mukherjee, “Wavelength-division-multiplexed passive optical network (WDM-PON) technologies for broadband access: a review [Invited],” J. Opt. Netw. 4(11), 737–758 (2005). [CrossRef]

3.

S-G. Mun, H-S. Cho, and C-H. Lee, “A cost-effective WDM-PON using a multiple contact Fabry-Perot laser diode,” in proceeding of ECOC2010, (Torino, Italy, 2010), paper Mo.1.B.3.

4.

C-K. Chan, L-K. Chen, and C. Lin, “WDM PON for next-generation optical broadband access networks,” in proceeding of OECC2006, (Kaohsiung, Taiwan, 2006) paper 5E2–1-1.

5.

J-H. Park, J-S. Baik, and C-H. Lee, “Fault-localization in WDM-PONs,” in the proceeding of OFC2006, 2006, paper JThB79.

6.

Z. Xu, Y. J. Wen, W.-D. Zhong, C.-J. Chae, X. F. Cheng, Y. Wang, C. Lu, and J. Shankar, “High-speed WDM-PON using CW injection-locked Fabry-Pérot laser diodes,” Opt. Express 15(6), 2953–2962 (2007). [CrossRef] [PubMed]

7.

S. P. Jung, Y. Takushima, and Y.C. Chung, “Generation of 5-Gps QPSK signal using directly modulated RSOA for 100-km coherent WDM-PON” in proceeding of OFC2011, (Los Angeles, California, 2011), paper OTuB3.

8.

L. Ana, S. Aleksic, J.A. Lazaro, G.M. Tosi Beleffi, F. Bonada, J. Prat, and A.L.J. Texeira, “Influence of broadcast traffic on energy efficiency of long-reach SARDANA access network, ” in proceeding of OFC2011, (Los Angeles, California, 2011), paper OThB5.

9.

Z. Xu, X. Cheng, Y-K. Yeo, L. Zhou, X. Shao, “60-channel bidirectional WDM-PON using a single 32*32 AWGR for 120 wavelengths distribution,” in Proceeding of OFC2011, (Los Angeles, California, 2011), paper JWA65.

10.

S. Jang, C-S. Lee, D-M. Seol, E-S. Jung, and B. W. Kim, “A bidirectional RSOA based WDM-PON utilizing a SCM signal for down-link and a baseband signal for up-link,” in proceeding of OFC2007 (Anaheim, California, 2007), Paper JThA78.

11.

F. Ponzini, F. Cavaliere, G. Berrettini, M. Presi, E. Ciaramella, N. Calabretta, and A. Bogoni, “Evolution scenario toward WDM-PON [Invited],” J. Opt. Commun. Netw. 1(4), C25–C34 (2009). [CrossRef]

12.

J. Ingenhoff, “Athermal AWG devices for WDM-PON architectures,” in the proceeding of LEOS 2006, 26–27 (2006).

13.

K. Y. Cho, Y. J. Lee, H. Y. Choi, A. Murakami, A. Agata, Y. Takushima, and Y. C. Chung, “Effects of reflection in RSOA-based WDM PON utilizing remodulation technique,” J. Lightwave Technol. 27(10), 1286–1295 (2009). [CrossRef]

14.

C. Bock and J. Prat, “WDM/TDM PON experiments using the AWG free spectral range periodicity to transmit unicast and multicast data,” Opt. Express 13(8), 2887–2891 (2005). [CrossRef] [PubMed]

15.

H. Takesue and T. Sugie, “Wavelength channel data rewrite using saturated SOA modulator for WDM networks with centralized light sources,” J. Lightwave Technol. 21(11), 2546–2556 (2003). [CrossRef]

16.

C. Bock, J. Prat, and S. D. Walker, “Hybrid WDM/TDM PON using the AWG FSR and featuring centralized light generation and dynamic bandwidth allocation,” J. Lightwave Technol. 23(12), 3981–3988 (2005). [CrossRef]

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4250) Fiber optics and optical communications : Networks

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: February 21, 2012
Revised Manuscript: April 20, 2012
Manuscript Accepted: April 23, 2012
Published: June 8, 2012

Citation
Zhaowen Xu, Xiaofei Cheng, Yong-Kee Yeo, Xu Shao, Luying Zhou, and Hongguang Zhang, "Large-scale WDM passive optical network based on cyclical AWG," Opt. Express 20, 13939-13946 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-13-13939


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References

  1. J. Yu, O. Akanbi, Y. Luo, Z. Zong, T. Wang, Z. Jia, and G.-K. Chang, “Demonstration of a novel WDM passive optical network architecture with source-free optical network units,” IEEE Photon. Technol. Lett.19(8), 571–573 (2007). [CrossRef]
  2. A. Banerjee, Y. Park, F. Clarke, H. Song, S. Yang, G. Kramer, K. Kim, and B. Mukherjee, “Wavelength-division-multiplexed passive optical network (WDM-PON) technologies for broadband access: a review [Invited],” J. Opt. Netw.4(11), 737–758 (2005). [CrossRef]
  3. S-G. Mun, H-S. Cho, and C-H. Lee, “A cost-effective WDM-PON using a multiple contact Fabry-Perot laser diode,” in proceeding of ECOC2010, (Torino, Italy, 2010), paper Mo.1.B.3.
  4. C-K. Chan, L-K. Chen, and C. Lin, “WDM PON for next-generation optical broadband access networks,” in proceeding of OECC2006, (Kaohsiung, Taiwan, 2006) paper 5E2–1-1.
  5. J-H. Park, J-S. Baik, and C-H. Lee, “Fault-localization in WDM-PONs,” in the proceeding of OFC2006, 2006, paper JThB79.
  6. Z. Xu, Y. J. Wen, W.-D. Zhong, C.-J. Chae, X. F. Cheng, Y. Wang, C. Lu, and J. Shankar, “High-speed WDM-PON using CW injection-locked Fabry-Pérot laser diodes,” Opt. Express15(6), 2953–2962 (2007). [CrossRef] [PubMed]
  7. S. P. Jung, Y. Takushima, and Y.C. Chung, “Generation of 5-Gps QPSK signal using directly modulated RSOA for 100-km coherent WDM-PON” in proceeding of OFC2011, (Los Angeles, California, 2011), paper OTuB3.
  8. L. Ana, S. Aleksic, J.A. Lazaro, G.M. Tosi Beleffi, F. Bonada, J. Prat, and A.L.J. Texeira, “Influence of broadcast traffic on energy efficiency of long-reach SARDANA access network, ” in proceeding of OFC2011, (Los Angeles, California, 2011), paper OThB5.
  9. Z. Xu, X. Cheng, Y-K. Yeo, L. Zhou, X. Shao, “60-channel bidirectional WDM-PON using a single 32*32 AWGR for 120 wavelengths distribution,” in Proceeding of OFC2011, (Los Angeles, California, 2011), paper JWA65.
  10. S. Jang, C-S. Lee, D-M. Seol, E-S. Jung, and B. W. Kim, “A bidirectional RSOA based WDM-PON utilizing a SCM signal for down-link and a baseband signal for up-link,” in proceeding of OFC2007 (Anaheim, California, 2007), Paper JThA78.
  11. F. Ponzini, F. Cavaliere, G. Berrettini, M. Presi, E. Ciaramella, N. Calabretta, and A. Bogoni, “Evolution scenario toward WDM-PON [Invited],” J. Opt. Commun. Netw.1(4), C25–C34 (2009). [CrossRef]
  12. J. Ingenhoff, “Athermal AWG devices for WDM-PON architectures,” in the proceeding of LEOS 2006, 26–27 (2006).
  13. K. Y. Cho, Y. J. Lee, H. Y. Choi, A. Murakami, A. Agata, Y. Takushima, and Y. C. Chung, “Effects of reflection in RSOA-based WDM PON utilizing remodulation technique,” J. Lightwave Technol.27(10), 1286–1295 (2009). [CrossRef]
  14. C. Bock and J. Prat, “WDM/TDM PON experiments using the AWG free spectral range periodicity to transmit unicast and multicast data,” Opt. Express13(8), 2887–2891 (2005). [CrossRef] [PubMed]
  15. H. Takesue and T. Sugie, “Wavelength channel data rewrite using saturated SOA modulator for WDM networks with centralized light sources,” J. Lightwave Technol.21(11), 2546–2556 (2003). [CrossRef]
  16. C. Bock, J. Prat, and S. D. Walker, “Hybrid WDM/TDM PON using the AWG FSR and featuring centralized light generation and dynamic bandwidth allocation,” J. Lightwave Technol.23(12), 3981–3988 (2005). [CrossRef]

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