We have evaluated the performances of bidirectional optical amplifiers which were suited for the cost-effective implementation of amplified bidirectional passive optical networks (PONs). First, we measured the maximum gains of two simple bidirectional optical amplifiers implemented without using any optical components for the suppression of reflected signals. From the results, the maximum gains of two simple bidirectional amplifiers with a broadband light source (BLS) seeded optical source were limited to be 27 dB due to the reflection-induced in-band crosstalk, when the reflectance coefficients were measured to be -33 dB in both directions. Then, we have also implemented a bidirectional optical amplifier with two band splitters for the amplified bidirectional PON where the two different wavelength bands were allocated to the downstream and upstream signals transmission. In our measurement, we confirmed that the maximum gain of bidirectional optical amplifier with two band splitters could be increased to more than 30 dB owing to the efficient suppression of in-band crosstalk.

© 2011 Optical Society of Korea

1. R. P. Davey, P. Healey, I. Hope, P. Watkinson, D. B. Payne,O. Marmur, J. Ruhmann, and Y. Zuiderveld, “DWDM reachextension of a GPON to 135 km,” J. Lightwave Technol.24, 29-31 (2006). [CrossRef]
2. I. T. Monroy, R. Kjaer, B. Palsdottir, A. M. J. Koonen, andP. Jeppesen, “10 Gb/s bidirectional single fibre long reachPON link with distributed Raman amplification,” in Proc.Eur. Conf. Optical Communication 2006 (Cannes, France,Sep. 2006), We3.P.166.
3. H. H. Lee, K. C. Reichmann, P. P. Iannone, X. Zhou, andB. Palsdottir, “A hybrid-amplified PON with 75-nm downstreamband-with, 60 km reach, 1:64 split and multiple video services,”in Proc. OFC/NFOEC 2007 (Anaheim, CA, USA, Mar. 2007),OWL2.
4. C. H. Kim, J. H. Lee, and K. Lee, “Analysis of maximumreach in WDM PON architecture based on distributed Ramanamplification and pump recycling technique,” Opt. Express15, 14942-14947 (2007). [CrossRef]
5. J. L. Gimlett, M. Z. Iqbal, N. K. Cheung, A. Righetti, F.Fontana, and G. Grasso, “Observation of equivalent Rayleighscattering mirrors in lightwave systems with optical amplifier,”IEEE Photon. Technol. Lett. 2, 211-213 (1990). [CrossRef]
6. C.-H. Lee and S.-G. Mun, “WDM-PON based on wavelength-lockedFabry-Perot LDs,” J. Opt. Soc. Korea 12, 326-336 (2008). [CrossRef]
7. B. W. Kim, “RSOA-based wavelength-reuse gigabit WDM-PON,”J. Opt. Soc. Korea 12, 337-345 (2008). [CrossRef]
8. M. O. van Deventer and O. J. Koning, “Bidirectional transmissionusing an erbium-doped fiber amplifier without opticalisolators,” IEEE Photon. Technol. Lett. 7, 1372-1374 (1995). [CrossRef]
9. C. H. Kim, K. Lee, and S. B. Lee, “Effects of in-bandcrosstalk in wavelength-locked Fabry-Perot laser diodebased WDM PONs,” IEEE Photon. Technol. Lett. 21, 596-598(2009). [CrossRef]
10. F. Khaleghi, J. Li, M. Kavehrad, and H. Kim, “Increasingrepeater span in high-speed bidirectional WDM transmissionsystems using a new bidirectional EDFA configuration,”IEEE Photon. Technol. Lett. 8, 1252-1254 (1996). [CrossRef]
11. M. F. Huang, J. Chen, K. M. Feng, C. C. Wei, C. Y. Lai,T. Y. Lin, and S. Chi, “210-km bidirectional transmission systemwith a novel four-port interleaver to facilitate unidirectionalamplification,” IEEE Photon. Technol. Lett. 18, 172-174 (2006). [CrossRef]
12. C. H. Kim, J. H. Lee, D. K. Jung, Y.-G. Han, and S. B.Lee, “Performance comparison of directly-modulated, wavelength-lockedFabry-Perot laser diode and EAM-modulated spectrum-slicedASE source for 1.25 Gb/s WDM-PON,” in Proc.OFC/NFOEC 2007 (Anaheim, CA, USA, Mar. 2007), JWA82.

IEEE Photon. Technol. Lett.

• J. L. Gimlett, M. Z. Iqbal, N. K. Cheung, A. Righetti, F.Fontana, and G. Grasso, “Observation of equivalent Rayleighscattering mirrors in lightwave systems with optical amplifier,”IEEE Photon. Technol. Lett. 2, 211-213 (1990). [CrossRef]
• M. O. van Deventer and O. J. Koning, “Bidirectional transmissionusing an erbium-doped fiber amplifier without opticalisolators,” IEEE Photon. Technol. Lett. 7, 1372-1374 (1995). [CrossRef]
• C. H. Kim, K. Lee, and S. B. Lee, “Effects of in-bandcrosstalk in wavelength-locked Fabry-Perot laser diodebased WDM PONs,” IEEE Photon. Technol. Lett. 21, 596-598(2009). [CrossRef]
• F. Khaleghi, J. Li, M. Kavehrad, and H. Kim, “Increasingrepeater span in high-speed bidirectional WDM transmissionsystems using a new bidirectional EDFA configuration,”IEEE Photon. Technol. Lett. 8, 1252-1254 (1996). [CrossRef]
• M. F. Huang, J. Chen, K. M. Feng, C. C. Wei, C. Y. Lai,T. Y. Lin, and S. Chi, “210-km bidirectional transmission systemwith a novel four-port interleaver to facilitate unidirectionalamplification,” IEEE Photon. Technol. Lett. 18, 172-174 (2006). [CrossRef]

J. Lightwave Technol.

• R. P. Davey, P. Healey, I. Hope, P. Watkinson, D. B. Payne,O. Marmur, J. Ruhmann, and Y. Zuiderveld, “DWDM reachextension of a GPON to 135 km,” J. Lightwave Technol.24, 29-31 (2006). [CrossRef]

Journal of the Optical Society of Korea

• C.-H. Lee and S.-G. Mun, “WDM-PON based on wavelength-lockedFabry-Perot LDs,” J. Opt. Soc. Korea 12, 326-336 (2008). [CrossRef]
• B. W. Kim, “RSOA-based wavelength-reuse gigabit WDM-PON,”J. Opt. Soc. Korea 12, 337-345 (2008). [CrossRef]

Opt. Express

• C. H. Kim, J. H. Lee, and K. Lee, “Analysis of maximumreach in WDM PON architecture based on distributed Ramanamplification and pump recycling technique,” Opt. Express15, 14942-14947 (2007). [CrossRef]

Proc. Eur. Conf. Optical Communication 2006

• I. T. Monroy, R. Kjaer, B. Palsdottir, A. M. J. Koonen, andP. Jeppesen, “10 Gb/s bidirectional single fibre long reachPON link with distributed Raman amplification,” in Proc.Eur. Conf. Optical Communication 2006 (Cannes, France,Sep. 2006), We3.P.166.

Proc. OFC/NFOEC 2007

• H. H. Lee, K. C. Reichmann, P. P. Iannone, X. Zhou, andB. Palsdottir, “A hybrid-amplified PON with 75-nm downstreamband-with, 60 km reach, 1:64 split and multiple video services,”in Proc. OFC/NFOEC 2007 (Anaheim, CA, USA, Mar. 2007),OWL2.
• C. H. Kim, J. H. Lee, D. K. Jung, Y.-G. Han, and S. B.Lee, “Performance comparison of directly-modulated, wavelength-lockedFabry-Perot laser diode and EAM-modulated spectrum-slicedASE source for 1.25 Gb/s WDM-PON,” in Proc.OFC/NFOEC 2007 (Anaheim, CA, USA, Mar. 2007), JWA82.

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