Abstract

Fiber-to-the-home (FTTH) has now reached the stage where it is providing real-time broadband services. Since even a temporary suspension of broadcasting and telephone services cannot be permitted, it has become important to improve the reliability of FTTH network operation. We have developed an advanced optical line switching system that diverts transmission signals from an in-service line to a spare line without interrupting communication. This system is realized by equalizing the transmission times of the signals sent through dualized lines composed of an in-service line and a spare line. The transmission times are equalized by employing two techniques in the dualized lines. One is a technique that uses a free space optics system to tune the optical line length continuously. The other is a technique for measuring a wide range of time differences between signals transmitted through the dualized lines. Since the dualized lines have a Mach–Zehnder interference structure, the differences can be detected with high accuracy by employing dual-light interferometry. We applied this switching system to a gigabit Ethernet passive optical network (GE-PON) during transmission and succeeded in switching in-service lines without inducing any frame loss.

© 2010 IEEE

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  1. I. Sankawa, F. Yamamoto, Y. Okumura, Y. Ogura, "Cost and quantity analysis of passive double-star optical-access-network facilities for broadband service multiplexing," J. Lightw. Technol. 24, 3625-3634 (2006).
  2. S. Hornung, R. Wood, P. Keeble, "Single-mode optical networks to the home," Proc. Int. Conf. Commun. (1990) pp. 1563-1571.
  3. “Broadband optical access systems based on passive optical networks (PON),” ITU-T Recommendation G.983.1 (1998).
  4. D. J. Xu, W. Yen, E. Ho, "Proposal of a new protection mechanism for ATM PON interface," Proc. IEEE Int. Conf. Commun. (2001) pp. 2160-2165.
  5. K. Tanaka, Y. Horiuchi, "1:N OLT redundant protection architecture in ethernet PON system," OFC/NFOEC San DiegoCA (2008) NthB4.
  6. I. Watanabe, H. Saito, H. Kobayashi, S. Takashima, "Subscriber optical fiber cable transfer splicing using mechanically transferable connectors," IEEE J. Lightw. Technol. 10, 720-727 (1992).
  7. K. Tanaka, M. Zaima, M. Tachikura, M. Nakamura, "Downsized and enhanced optical fiber cable transfer splicing system," 51st IWCS, Tech. Session 18-01 (2002).
  8. K. Yoshida, T. Tsujimura, T. Kurashima, "Seamless transmission between single-mode optical fibers using free space optics system," SICE Ann. Conf. (2008) pp. 2219-2222.
  9. K. Tanaka, T. Tsujimura, K. Yoshida, K. Katayama, Y. Azuma, "Frame-loss-free optical line switching method for in-service optical access network using interferometry line length measurement," OFC San DiegoCA (2009) paper PDPD6.
  10. T. Tsujimura, K. Tanaka, K. Yoshida, K. Katayama, Y. Azuma, "Infallible layer-one protection switching technique for optical fiber network," 14th Euro. Conf. Netw. Opt. Commun./4th Conf. Opt. Cabling Infrastructure ValladolidSpain (2009).
  11. Y. Fukada, K. Suzuki, H. Nakamura, N. Yoshimoto, M. Tsubokawa, "First demonstration of fast automatic-gain-control (AGC) PDFA for amplifying burst-mode PON upstream signal," ECOC BrusselsBelgium (2008) paper WE.2F.4.
  12. K.-I. Suzuki, Y. Fukada, T. Nakanishi, N. Yoshimoto, M. Tsubokawa, "Burst-mode optical amplifier for long-reach 10 Gbit/s PON application," OFC San DiegoCA (2008) paper OthL3.
  13. Y. Azuma, K. Tanaka, K. Yoshida, K. Katayama, T. Tsujimura, M. Shimizu, “Basic investigation of new transfer method for optical access line,” IEICE Tech. Rep. Japan OFT2008-52 (2008–11) pp. 27-31.

2006 (1)

I. Sankawa, F. Yamamoto, Y. Okumura, Y. Ogura, "Cost and quantity analysis of passive double-star optical-access-network facilities for broadband service multiplexing," J. Lightw. Technol. 24, 3625-3634 (2006).

1992 (1)

I. Watanabe, H. Saito, H. Kobayashi, S. Takashima, "Subscriber optical fiber cable transfer splicing using mechanically transferable connectors," IEEE J. Lightw. Technol. 10, 720-727 (1992).

IEEE J. Lightw. Technol. (1)

I. Watanabe, H. Saito, H. Kobayashi, S. Takashima, "Subscriber optical fiber cable transfer splicing using mechanically transferable connectors," IEEE J. Lightw. Technol. 10, 720-727 (1992).

J. Lightw. Technol. (1)

I. Sankawa, F. Yamamoto, Y. Okumura, Y. Ogura, "Cost and quantity analysis of passive double-star optical-access-network facilities for broadband service multiplexing," J. Lightw. Technol. 24, 3625-3634 (2006).

Other (11)

S. Hornung, R. Wood, P. Keeble, "Single-mode optical networks to the home," Proc. Int. Conf. Commun. (1990) pp. 1563-1571.

“Broadband optical access systems based on passive optical networks (PON),” ITU-T Recommendation G.983.1 (1998).

D. J. Xu, W. Yen, E. Ho, "Proposal of a new protection mechanism for ATM PON interface," Proc. IEEE Int. Conf. Commun. (2001) pp. 2160-2165.

K. Tanaka, Y. Horiuchi, "1:N OLT redundant protection architecture in ethernet PON system," OFC/NFOEC San DiegoCA (2008) NthB4.

K. Tanaka, M. Zaima, M. Tachikura, M. Nakamura, "Downsized and enhanced optical fiber cable transfer splicing system," 51st IWCS, Tech. Session 18-01 (2002).

K. Yoshida, T. Tsujimura, T. Kurashima, "Seamless transmission between single-mode optical fibers using free space optics system," SICE Ann. Conf. (2008) pp. 2219-2222.

K. Tanaka, T. Tsujimura, K. Yoshida, K. Katayama, Y. Azuma, "Frame-loss-free optical line switching method for in-service optical access network using interferometry line length measurement," OFC San DiegoCA (2009) paper PDPD6.

T. Tsujimura, K. Tanaka, K. Yoshida, K. Katayama, Y. Azuma, "Infallible layer-one protection switching technique for optical fiber network," 14th Euro. Conf. Netw. Opt. Commun./4th Conf. Opt. Cabling Infrastructure ValladolidSpain (2009).

Y. Fukada, K. Suzuki, H. Nakamura, N. Yoshimoto, M. Tsubokawa, "First demonstration of fast automatic-gain-control (AGC) PDFA for amplifying burst-mode PON upstream signal," ECOC BrusselsBelgium (2008) paper WE.2F.4.

K.-I. Suzuki, Y. Fukada, T. Nakanishi, N. Yoshimoto, M. Tsubokawa, "Burst-mode optical amplifier for long-reach 10 Gbit/s PON application," OFC San DiegoCA (2008) paper OthL3.

Y. Azuma, K. Tanaka, K. Yoshida, K. Katayama, T. Tsujimura, M. Shimizu, “Basic investigation of new transfer method for optical access line,” IEICE Tech. Rep. Japan OFT2008-52 (2008–11) pp. 27-31.

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