Bidirectional transmission using an erbium-doped fiber amplifier without optical isolators

Deventer, M.O. van; Koning, O.J.

doi:10.1109/68.473502

Cited by 18 publications

(7 citation statements)

References 6 publications

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“…3(a) and G1G2R1R2 in Fig. 3(b), where G, G1 and G2 were the bidirectional gain, the unidirectional gain of downstream signal and upstream signal in the optical amplifiers, and R1 and R2 were the reflectance coefficients at both sides of bidirectional amplifiers, respectively [5,8]. In case of Fig.…”

Section: Resultsmentioning

confidence: 99%

“…3(a) could be increased to be 27 dB with a BLS seeded RSOA source and a reflectance coefficient of -33 dB in both directions, while the bidirectional gain with a DFB-LD was limited to be ~22 dB. The in-band crosstalk induced penalties with a DFB-LD [8] and a BLS seeded optical source [9] in amplified PONs could be estimated with the following equations, respectively; ), 1 log( 10…”

Section: Resultsmentioning

confidence: 99%

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Performance Evaluation of Bidirectional Optical Amplifiers for Amplified Passive Optical Network Based on Broadband Light Source Seeded Optical Sources

Kang¹,

Kim²

2011

Journal of the Optical Society of Korea

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We have evaluated the performances of bidirectional optical amplifiers which were suited for the costeffective 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.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Performance Evaluation of Bidirectional Optical Amplifiers for Amplified Passive Optical Network Based on Broadband Light Source Seeded Optical Sources

Kang¹,

Kim²

2011

Journal of the Optical Society of Korea

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“…Commercially available optical amplifiers for long distance transmissions are not bidirectional. There have been many proposals for optical amplification of bidirectional fiber links including repeaterless approaches -pre and post amplifying the optical signals at transmitters and receivers, respectively, instead of adding a bidirectional optical amplifier at the middle of the transmission path [22]- [25], and repeated approaches -adding bidirectional optical amplifiers in the path [26]- [30]. Surely, using bidirectional optical amplifiers will allow the networks to have a larger coverage.…”

Section: A Principle and System Requirementsmentioning

confidence: 98%

On Wavelength-Routed Networks With Reversible Wavelength Channels

Wai

Li³

2013

J. Lightwave Technol.

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We observe that the performance of wavelengthrouted (WR) networks often suffers from asymmetric traffic and network traffic patterns differing from the original design plans. WR networks with a fixed number of channels in a given transmission direction are inflexible. Therefore, we propose reversible wavelength channels. Like a reversible lane in highway systems, a reversible wavelength channel has the flexibility of its transmission direction being configurable at the setup of a lightpath. So far reversible wavelength channels have not been discussed in WR networks even though we observe that most of the required technologies are already available. In this paper, we discuss all the required technologies for implementing reversible wavelength channels in WR networks. We demonstrate that reversible wavelength channel can provide significant performance improvement for WR networks when the traffic is asymmetric. Even if the traffic is symmetric, we also have nontrivial performance improvement with reversible wavelength channels, i.e., the blocking performance of WR networks with reversible wavelength channels will be similar to that of normal WR networks with doubling the number of fibers per link. Different implementation approaches for reversible wavelength channels are discussed. Among them, the performance of the reversible waveband approach is discussed in detail.Index Terms-Lightpath, reversible waveband, reversible wavelength channel, wavelength-routed networks.

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“…3(a) and (b). In our measurements, the crosstalk-to-signal ratio could be estimated with G 2 R 1 R 2 or G 1 G 2 R 1 R 2 , where G, G 1 and G 2 were the bidirectional and unidirectional gain of optical amplifiers, and R 1 and R 2 were the reflectance coefficients at both sides of bidirectional amplifiers, respectively [5,7]. For all measurements with an amplified WDM-PON shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Limitation on gain of bidirectional amplifier in amplified WDM-PON using broadband light source seeded optical sources

Kang

Kim

2010

2010 Photonics Global Conference

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We investigated the effect of in-band crosstalk on the bidirectional gain in amplified wavelength-division multiplexed passive optical networks (WDM-PONs). In a bidirectional transmission system over a single fiber, the system's performance could be degraded by the in-band crosstalk generated with a double Rayleigh backscattering within a transmission fiber and a gain of bidirectional optical amplifier. Thus, the maximum gain of bidirectional optical amplifier in an amplified WDM-PON was evaluated with a broadband light source (BLS) seeded optical source. Using two simple bidirectional amplifiers without any optical components for the suppression of reflected signals, we found that the bidirectional gain could be increased to be 27 dB with a BLS seeded optical source.

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Bidirectional transmission using an erbium-doped fiber amplifier without optical isolators

Cited by 18 publications

References 6 publications

Performance Evaluation of Bidirectional Optical Amplifiers for Amplified Passive Optical Network Based on Broadband Light Source Seeded Optical Sources

Performance Evaluation of Bidirectional Optical Amplifiers for Amplified Passive Optical Network Based on Broadband Light Source Seeded Optical Sources

On Wavelength-Routed Networks With Reversible Wavelength Channels

Limitation on gain of bidirectional amplifier in amplified WDM-PON using broadband light source seeded optical sources

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