Abstract

The extinction ratio (ER) for the downstream and upstream transmission signals needs to be compromised for the WDM-PON systems with directly modulated lasers at the center office and reflective semiconductor optical amplifiers at the user ends. We propose to enhance the performance by adding a FP etalon before the receiver of each optical network unit (ONU). The etalon performs spectral reshaping and then waveform reshaping to the downstream signals. This allows the use of low-ER downstream signals that reduce the intensity fluctuation of RSOA-remodulated upstream signals. This approach can also extend the transmission distance by reducing the transient chirp. Colorless operation can still be obtained since the same etalon can be used to enhance multiple wavelength channels. Experimental results verify considerable performance improvement on WDM-PONs with 10-Gbps and 1.25-Gbps data rates for the downstream and upstream transmission, respectively.

© 2008 Optical Society of America

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  1. S. J. Park, C. H. Lee, K. T. Jeong, H. J. Park, J. G. Ahn, and K. H. Song, "Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network," IEEE J. Lightwave. Technol. 22, 2582-2591 (2004).
    [CrossRef]
  2. K. Iwatsuki, J. I. Kani, H. Suzuki, and M. Fujiwara, "Access and metro networks based on WDM technologies," IEEE J. Lightwave. Technol. 22, 2623-2630 (2004).
    [CrossRef]
  3. P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
    [CrossRef]
  4. F. Payoux, P. Chanclou, M. Moisnard, and R. Brenot, "Gigabit optical access using WDM PON based on spectrum slicing and reflective SOA," in Proc. ECOC 2005 Sep. 25-29, 2005, 3, 455-456, Paper We 3.3.5.
  5. C. Arellano, C. Bock, and J. Prat, "RSOA-based optical network units for WDM-PON," OFC’2006 paper OTuCl.
  6. J. Prat, V. Polo, C. Bock, C. Arellano, and J. J. Vegas Olmos, "Full-duplex single fiber transmission using FSK downstream and IM remote upstream modulations for fiber-to-the-home," IEEE Photon. Technol. Lett. 17, 702-704 (2005).
    [CrossRef]
  7. S. Y. Kim, E. S. Son, S. B. Jun, and Y. C. Chung, "Effects of downstream modulation formats on the performance of bidirectional WDM-PON using RSOA," OFC 2007 paper OWD3.
  8. W. Lee, S. H. Cho, M. Y. Park, J. H. Lee, C. Kim, G. Jeong, and B. W. Kim., "Frequency detuning effects in a loop-back WDM-PON employing gain-saturated RSOAs," IEEE Photon. Technol. Lett.  18, 1436-1438 (2006).
    [CrossRef]
  9. J. D. Downie and R. S. Vodhanel, "Reach enhancement of a 10Gbps directly modulated laser with demultiplexer filtering," LEOS 2004 ThE4, 784-785.
  10. L. S. Yan, and A. E. Willner, "Reach extension in 10-Gb/s directly modulated transmission systems using asymmetric and narrowband optical filtering," Opt. Express 13, 5106-5115 (2005).
    [CrossRef] [PubMed]
  11. S. C. Lin and S. L. Lee, "Simultaneous improvement on two 10-Gb/s channels with directly modulated lasers," OECC2006 paper 4F1-5.
  12. M. Fujiwara, J. Kani, H. Suzuki, and K. Iwatsuki, "Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks," IEEE J. Lightwave. Technol. 24, 740-746 (2006).
    [CrossRef]
  13. G. Talli, D. Cotter, and P. D. Townsend, "Rayleigh backscattering impairments in access networks with centralised light source," Electron. Lett. 42, 877-878 (2006).
    [CrossRef]
  14. C. Arellano and J. Prat, "On the influence of ONU-Gain on transmission in centrally seeded-light WDM-PONs," OFC 2007 paper OTuG4.
  15. E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.C. Amann, "Rayleigh backscattering and extinction ratio study of optically injection-locked 1.55 ?m VCSELs," Electron. Lett. 43, 182-183 (2007).
    [CrossRef]
  16. W. S. Jang, H. C. Kwon, and S. K. Han, "Suppression of Rayleigh backscattering in a bidirectional WDM optical link using clipped direct modulation," IEE Proc.-Optoelectron.  151, 219-222 (2004).
    [CrossRef]
  17. J. A. Lazaro, C. Arellano, V. Polo, and J. Prat, "Rayleigh scattering reduction by means of optical frequency dithering in passive optical networks with remotely seeded ONUs," IEEE Photon. Technol. Lett.  19, 64-66 (2007).
    [CrossRef]

2007

E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.C. Amann, "Rayleigh backscattering and extinction ratio study of optically injection-locked 1.55 ?m VCSELs," Electron. Lett. 43, 182-183 (2007).
[CrossRef]

J. A. Lazaro, C. Arellano, V. Polo, and J. Prat, "Rayleigh scattering reduction by means of optical frequency dithering in passive optical networks with remotely seeded ONUs," IEEE Photon. Technol. Lett.  19, 64-66 (2007).
[CrossRef]

2006

M. Fujiwara, J. Kani, H. Suzuki, and K. Iwatsuki, "Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks," IEEE J. Lightwave. Technol. 24, 740-746 (2006).
[CrossRef]

G. Talli, D. Cotter, and P. D. Townsend, "Rayleigh backscattering impairments in access networks with centralised light source," Electron. Lett. 42, 877-878 (2006).
[CrossRef]

W. Lee, S. H. Cho, M. Y. Park, J. H. Lee, C. Kim, G. Jeong, and B. W. Kim., "Frequency detuning effects in a loop-back WDM-PON employing gain-saturated RSOAs," IEEE Photon. Technol. Lett.  18, 1436-1438 (2006).
[CrossRef]

2005

L. S. Yan, and A. E. Willner, "Reach extension in 10-Gb/s directly modulated transmission systems using asymmetric and narrowband optical filtering," Opt. Express 13, 5106-5115 (2005).
[CrossRef] [PubMed]

J. Prat, V. Polo, C. Bock, C. Arellano, and J. J. Vegas Olmos, "Full-duplex single fiber transmission using FSK downstream and IM remote upstream modulations for fiber-to-the-home," IEEE Photon. Technol. Lett. 17, 702-704 (2005).
[CrossRef]

2004

S. J. Park, C. H. Lee, K. T. Jeong, H. J. Park, J. G. Ahn, and K. H. Song, "Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network," IEEE J. Lightwave. Technol. 22, 2582-2591 (2004).
[CrossRef]

K. Iwatsuki, J. I. Kani, H. Suzuki, and M. Fujiwara, "Access and metro networks based on WDM technologies," IEEE J. Lightwave. Technol. 22, 2623-2630 (2004).
[CrossRef]

W. S. Jang, H. C. Kwon, and S. K. Han, "Suppression of Rayleigh backscattering in a bidirectional WDM optical link using clipped direct modulation," IEE Proc.-Optoelectron.  151, 219-222 (2004).
[CrossRef]

2001

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

Ahn, J. G.

S. J. Park, C. H. Lee, K. T. Jeong, H. J. Park, J. G. Ahn, and K. H. Song, "Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network," IEEE J. Lightwave. Technol. 22, 2582-2591 (2004).
[CrossRef]

Amann, M.C.

E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.C. Amann, "Rayleigh backscattering and extinction ratio study of optically injection-locked 1.55 ?m VCSELs," Electron. Lett. 43, 182-183 (2007).
[CrossRef]

Arellano, C.

J. A. Lazaro, C. Arellano, V. Polo, and J. Prat, "Rayleigh scattering reduction by means of optical frequency dithering in passive optical networks with remotely seeded ONUs," IEEE Photon. Technol. Lett.  19, 64-66 (2007).
[CrossRef]

J. Prat, V. Polo, C. Bock, C. Arellano, and J. J. Vegas Olmos, "Full-duplex single fiber transmission using FSK downstream and IM remote upstream modulations for fiber-to-the-home," IEEE Photon. Technol. Lett. 17, 702-704 (2005).
[CrossRef]

Bock, C.

J. Prat, V. Polo, C. Bock, C. Arellano, and J. J. Vegas Olmos, "Full-duplex single fiber transmission using FSK downstream and IM remote upstream modulations for fiber-to-the-home," IEEE Photon. Technol. Lett. 17, 702-704 (2005).
[CrossRef]

Chang-Hasnain, C. J.

E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.C. Amann, "Rayleigh backscattering and extinction ratio study of optically injection-locked 1.55 ?m VCSELs," Electron. Lett. 43, 182-183 (2007).
[CrossRef]

Cho, S. H.

W. Lee, S. H. Cho, M. Y. Park, J. H. Lee, C. Kim, G. Jeong, and B. W. Kim., "Frequency detuning effects in a loop-back WDM-PON employing gain-saturated RSOAs," IEEE Photon. Technol. Lett.  18, 1436-1438 (2006).
[CrossRef]

Cotter, D.

G. Talli, D. Cotter, and P. D. Townsend, "Rayleigh backscattering impairments in access networks with centralised light source," Electron. Lett. 42, 877-878 (2006).
[CrossRef]

Ford, C.

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

Fujiwara, M.

M. Fujiwara, J. Kani, H. Suzuki, and K. Iwatsuki, "Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks," IEEE J. Lightwave. Technol. 24, 740-746 (2006).
[CrossRef]

K. Iwatsuki, J. I. Kani, H. Suzuki, and M. Fujiwara, "Access and metro networks based on WDM technologies," IEEE J. Lightwave. Technol. 22, 2623-2630 (2004).
[CrossRef]

Han, S. K.

W. S. Jang, H. C. Kwon, and S. K. Han, "Suppression of Rayleigh backscattering in a bidirectional WDM optical link using clipped direct modulation," IEE Proc.-Optoelectron.  151, 219-222 (2004).
[CrossRef]

Healey, P.

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

Hofmann, W.

E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.C. Amann, "Rayleigh backscattering and extinction ratio study of optically injection-locked 1.55 ?m VCSELs," Electron. Lett. 43, 182-183 (2007).
[CrossRef]

Iwatsuki, K.

M. Fujiwara, J. Kani, H. Suzuki, and K. Iwatsuki, "Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks," IEEE J. Lightwave. Technol. 24, 740-746 (2006).
[CrossRef]

K. Iwatsuki, J. I. Kani, H. Suzuki, and M. Fujiwara, "Access and metro networks based on WDM technologies," IEEE J. Lightwave. Technol. 22, 2623-2630 (2004).
[CrossRef]

Jang, W. S.

W. S. Jang, H. C. Kwon, and S. K. Han, "Suppression of Rayleigh backscattering in a bidirectional WDM optical link using clipped direct modulation," IEE Proc.-Optoelectron.  151, 219-222 (2004).
[CrossRef]

Jeong, G.

W. Lee, S. H. Cho, M. Y. Park, J. H. Lee, C. Kim, G. Jeong, and B. W. Kim., "Frequency detuning effects in a loop-back WDM-PON employing gain-saturated RSOAs," IEEE Photon. Technol. Lett.  18, 1436-1438 (2006).
[CrossRef]

Jeong, K. T.

S. J. Park, C. H. Lee, K. T. Jeong, H. J. Park, J. G. Ahn, and K. H. Song, "Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network," IEEE J. Lightwave. Technol. 22, 2582-2591 (2004).
[CrossRef]

Johnston, L.

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

Kani, J.

M. Fujiwara, J. Kani, H. Suzuki, and K. Iwatsuki, "Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks," IEEE J. Lightwave. Technol. 24, 740-746 (2006).
[CrossRef]

Kani, J. I.

K. Iwatsuki, J. I. Kani, H. Suzuki, and M. Fujiwara, "Access and metro networks based on WDM technologies," IEEE J. Lightwave. Technol. 22, 2623-2630 (2004).
[CrossRef]

Kim, B. W.

W. Lee, S. H. Cho, M. Y. Park, J. H. Lee, C. Kim, G. Jeong, and B. W. Kim., "Frequency detuning effects in a loop-back WDM-PON employing gain-saturated RSOAs," IEEE Photon. Technol. Lett.  18, 1436-1438 (2006).
[CrossRef]

Kim, C.

W. Lee, S. H. Cho, M. Y. Park, J. H. Lee, C. Kim, G. Jeong, and B. W. Kim., "Frequency detuning effects in a loop-back WDM-PON employing gain-saturated RSOAs," IEEE Photon. Technol. Lett.  18, 1436-1438 (2006).
[CrossRef]

Kwon, H. C.

W. S. Jang, H. C. Kwon, and S. K. Han, "Suppression of Rayleigh backscattering in a bidirectional WDM optical link using clipped direct modulation," IEE Proc.-Optoelectron.  151, 219-222 (2004).
[CrossRef]

Lazaro, J. A.

J. A. Lazaro, C. Arellano, V. Polo, and J. Prat, "Rayleigh scattering reduction by means of optical frequency dithering in passive optical networks with remotely seeded ONUs," IEEE Photon. Technol. Lett.  19, 64-66 (2007).
[CrossRef]

Lealman, I.

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

Lee, C. H.

S. J. Park, C. H. Lee, K. T. Jeong, H. J. Park, J. G. Ahn, and K. H. Song, "Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network," IEEE J. Lightwave. Technol. 22, 2582-2591 (2004).
[CrossRef]

Lee, J. H.

W. Lee, S. H. Cho, M. Y. Park, J. H. Lee, C. Kim, G. Jeong, and B. W. Kim., "Frequency detuning effects in a loop-back WDM-PON employing gain-saturated RSOAs," IEEE Photon. Technol. Lett.  18, 1436-1438 (2006).
[CrossRef]

Lee, W.

W. Lee, S. H. Cho, M. Y. Park, J. H. Lee, C. Kim, G. Jeong, and B. W. Kim., "Frequency detuning effects in a loop-back WDM-PON employing gain-saturated RSOAs," IEEE Photon. Technol. Lett.  18, 1436-1438 (2006).
[CrossRef]

Moore, R.

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

Park, H. J.

S. J. Park, C. H. Lee, K. T. Jeong, H. J. Park, J. G. Ahn, and K. H. Song, "Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network," IEEE J. Lightwave. Technol. 22, 2582-2591 (2004).
[CrossRef]

Park, M. Y.

W. Lee, S. H. Cho, M. Y. Park, J. H. Lee, C. Kim, G. Jeong, and B. W. Kim., "Frequency detuning effects in a loop-back WDM-PON employing gain-saturated RSOAs," IEEE Photon. Technol. Lett.  18, 1436-1438 (2006).
[CrossRef]

Park, S. J.

S. J. Park, C. H. Lee, K. T. Jeong, H. J. Park, J. G. Ahn, and K. H. Song, "Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network," IEEE J. Lightwave. Technol. 22, 2582-2591 (2004).
[CrossRef]

Perrin, S.

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

Polo, V.

J. A. Lazaro, C. Arellano, V. Polo, and J. Prat, "Rayleigh scattering reduction by means of optical frequency dithering in passive optical networks with remotely seeded ONUs," IEEE Photon. Technol. Lett.  19, 64-66 (2007).
[CrossRef]

J. Prat, V. Polo, C. Bock, C. Arellano, and J. J. Vegas Olmos, "Full-duplex single fiber transmission using FSK downstream and IM remote upstream modulations for fiber-to-the-home," IEEE Photon. Technol. Lett. 17, 702-704 (2005).
[CrossRef]

Prat, J.

J. A. Lazaro, C. Arellano, V. Polo, and J. Prat, "Rayleigh scattering reduction by means of optical frequency dithering in passive optical networks with remotely seeded ONUs," IEEE Photon. Technol. Lett.  19, 64-66 (2007).
[CrossRef]

J. Prat, V. Polo, C. Bock, C. Arellano, and J. J. Vegas Olmos, "Full-duplex single fiber transmission using FSK downstream and IM remote upstream modulations for fiber-to-the-home," IEEE Photon. Technol. Lett. 17, 702-704 (2005).
[CrossRef]

Rivers, L.

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

Song, K. H.

S. J. Park, C. H. Lee, K. T. Jeong, H. J. Park, J. G. Ahn, and K. H. Song, "Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network," IEEE J. Lightwave. Technol. 22, 2582-2591 (2004).
[CrossRef]

Suzuki, H.

M. Fujiwara, J. Kani, H. Suzuki, and K. Iwatsuki, "Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks," IEEE J. Lightwave. Technol. 24, 740-746 (2006).
[CrossRef]

K. Iwatsuki, J. I. Kani, H. Suzuki, and M. Fujiwara, "Access and metro networks based on WDM technologies," IEEE J. Lightwave. Technol. 22, 2623-2630 (2004).
[CrossRef]

Talli, G.

G. Talli, D. Cotter, and P. D. Townsend, "Rayleigh backscattering impairments in access networks with centralised light source," Electron. Lett. 42, 877-878 (2006).
[CrossRef]

Townley, P.

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

Townsend, P.

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

Townsend, P. D.

G. Talli, D. Cotter, and P. D. Townsend, "Rayleigh backscattering impairments in access networks with centralised light source," Electron. Lett. 42, 877-878 (2006).
[CrossRef]

Vegas Olmos, J. J.

J. Prat, V. Polo, C. Bock, C. Arellano, and J. J. Vegas Olmos, "Full-duplex single fiber transmission using FSK downstream and IM remote upstream modulations for fiber-to-the-home," IEEE Photon. Technol. Lett. 17, 702-704 (2005).
[CrossRef]

Willner, A. E.

Wong, E.

E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.C. Amann, "Rayleigh backscattering and extinction ratio study of optically injection-locked 1.55 ?m VCSELs," Electron. Lett. 43, 182-183 (2007).
[CrossRef]

Yan, L. S.

Zhao, X.

E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.C. Amann, "Rayleigh backscattering and extinction ratio study of optically injection-locked 1.55 ?m VCSELs," Electron. Lett. 43, 182-183 (2007).
[CrossRef]

Electron. Lett.

P. Healey, P. Townsend, C. Ford, L. Johnston, P. Townley, I. Lealman, L. Rivers, S. Perrin, and R. Moore, "Spectral slicing WDM-PON using wavelength-seeded reflective SOAs," Electron. Lett. 37, 1181-1182 (2001).
[CrossRef]

G. Talli, D. Cotter, and P. D. Townsend, "Rayleigh backscattering impairments in access networks with centralised light source," Electron. Lett. 42, 877-878 (2006).
[CrossRef]

E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.C. Amann, "Rayleigh backscattering and extinction ratio study of optically injection-locked 1.55 ?m VCSELs," Electron. Lett. 43, 182-183 (2007).
[CrossRef]

IEEE J. Lightwave. Technol.

M. Fujiwara, J. Kani, H. Suzuki, and K. Iwatsuki, "Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks," IEEE J. Lightwave. Technol. 24, 740-746 (2006).
[CrossRef]

S. J. Park, C. H. Lee, K. T. Jeong, H. J. Park, J. G. Ahn, and K. H. Song, "Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network," IEEE J. Lightwave. Technol. 22, 2582-2591 (2004).
[CrossRef]

K. Iwatsuki, J. I. Kani, H. Suzuki, and M. Fujiwara, "Access and metro networks based on WDM technologies," IEEE J. Lightwave. Technol. 22, 2623-2630 (2004).
[CrossRef]

IEEE Photon. Technol. Lett

W. Lee, S. H. Cho, M. Y. Park, J. H. Lee, C. Kim, G. Jeong, and B. W. Kim., "Frequency detuning effects in a loop-back WDM-PON employing gain-saturated RSOAs," IEEE Photon. Technol. Lett.  18, 1436-1438 (2006).
[CrossRef]

J. A. Lazaro, C. Arellano, V. Polo, and J. Prat, "Rayleigh scattering reduction by means of optical frequency dithering in passive optical networks with remotely seeded ONUs," IEEE Photon. Technol. Lett.  19, 64-66 (2007).
[CrossRef]

IEEE Photon. Technol. Lett.

J. Prat, V. Polo, C. Bock, C. Arellano, and J. J. Vegas Olmos, "Full-duplex single fiber transmission using FSK downstream and IM remote upstream modulations for fiber-to-the-home," IEEE Photon. Technol. Lett. 17, 702-704 (2005).
[CrossRef]

Opt. Express

Optoelectron

W. S. Jang, H. C. Kwon, and S. K. Han, "Suppression of Rayleigh backscattering in a bidirectional WDM optical link using clipped direct modulation," IEE Proc.-Optoelectron.  151, 219-222 (2004).
[CrossRef]

Other

S. C. Lin and S. L. Lee, "Simultaneous improvement on two 10-Gb/s channels with directly modulated lasers," OECC2006 paper 4F1-5.

C. Arellano and J. Prat, "On the influence of ONU-Gain on transmission in centrally seeded-light WDM-PONs," OFC 2007 paper OTuG4.

S. Y. Kim, E. S. Son, S. B. Jun, and Y. C. Chung, "Effects of downstream modulation formats on the performance of bidirectional WDM-PON using RSOA," OFC 2007 paper OWD3.

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Figures (7)

Fig. 1.
Fig. 1.

Schematic of a DRWDM-PON system. A FP etalon is added before the receiver of each ONU.

Fig. 2.
Fig. 2.

Contour plot for the upstream power penalty after 25-km transmission versus ER and incident power of downstream signals to the RSOA. The data rates for downstream and upstream signals are 10 and 1.25 Gbps, respectively. The power penalty represents the degradation in the receiver penalty for a system with a given injection power and ER relative to one with -10-dBm injected power and 2.5 dB of ER.

Fig. 3.
Fig. 3.

(a) Optical spectra for the directly modulated signal. (b) Measured power penalty against fiber length for transmitting 10-Gbps data with a DML. The ER for the two curves with etalon is 3 dB.

Fig. 4.
Fig. 4.

Measured BER of downstream and upstream transmission for two WDM channels.

Fig. 5.
Fig. 5.

Eye diagrams for downstream signals after 25-km transmission (a) without and (b) with adding a FP etalon. The ER after DML is 3 dB.

Fig. 6.
Fig. 6.

Comparison of the upstream BER performance for one-fiber and two-fiber transmission.

Fig. 7.
Fig. 7.

BER performance of the upstream signal with a FP etalon in the CO to perform detuned filtering. The incident power and ER of downstream signal is -15 dBm and 5 dB, respectively.

Tables (1)

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Table 1. Comparisons between the proposed approach and the detuned filtering scheme

Equations (1)

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2 L ODN = P t , OLT P r , OLT + G RSOA S L DF

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