Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks

Masamichi Fujiwara; Jun Ichi Kani; Hiro Suzuki; Katsumi Iwatsuki

doi:10.1109/JLT.2005.862429

Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks

Masamichi Fujiwara, Jun Ichi Kani, Hiro Suzuki, Katsumi Iwatsuki

Research output: Contribution to journal › Article › peer-review

115 Citations (Scopus)

Abstract

This paper investigates the impact of backreflection lights on upstream transmission in wavelength division multiplexing (WDM) single-fiber loopback access networks, where a WDM light source is located at the central office (CO) and each optical network unit (ONU) includes an optical modulator with optical amplifiers. This study considers backreflection lights from two sources, the continuous wave (CW) light at the CO (Reflection-I) and the modulated signal at the ONU (Reflection-II). It is confirmed, for the first time, that the impact of Reflection-II increases strongly with ONU gain. To estimate the impact of these backreflection lights, a simple intensity noise estimation scheme is presented. This scheme clarifies that the acceptable transmission line losses is 10 dB for 1.25 Gb/s under the optical return loss (ORL) of -32 dB.

Original language	English
Pages (from-to)	740-745
Number of pages	6
Journal	Journal of Lightwave Technology
Volume	24
Issue number	2
DOIs	https://doi.org/10.1109/JLT.2005.862429
Publication status	Published - 2006 Feb 1
Externally published	Yes

Keywords

Backreflection
Bidirectional transmission
Optical access network
Semiconductor optical amplifier
Single-fiber loopback transmission
WDM

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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title = "Impact of backreflection on upstream transmission in WDM single-fiber loopback access networks",

abstract = "This paper investigates the impact of backreflection lights on upstream transmission in wavelength division multiplexing (WDM) single-fiber loopback access networks, where a WDM light source is located at the central office (CO) and each optical network unit (ONU) includes an optical modulator with optical amplifiers. This study considers backreflection lights from two sources, the continuous wave (CW) light at the CO (Reflection-I) and the modulated signal at the ONU (Reflection-II). It is confirmed, for the first time, that the impact of Reflection-II increases strongly with ONU gain. To estimate the impact of these backreflection lights, a simple intensity noise estimation scheme is presented. This scheme clarifies that the acceptable transmission line losses is 10 dB for 1.25 Gb/s under the optical return loss (ORL) of -32 dB.",

keywords = "Backreflection, Bidirectional transmission, Optical access network, Semiconductor optical amplifier, Single-fiber loopback transmission, WDM",

author = "Masamichi Fujiwara and Kani, {Jun Ichi} and Hiro Suzuki and Katsumi Iwatsuki",

year = "2006",

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AU - Fujiwara, Masamichi

AU - Kani, Jun Ichi

AU - Suzuki, Hiro

AU - Iwatsuki, Katsumi

PY - 2006/2/1

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N2 - This paper investigates the impact of backreflection lights on upstream transmission in wavelength division multiplexing (WDM) single-fiber loopback access networks, where a WDM light source is located at the central office (CO) and each optical network unit (ONU) includes an optical modulator with optical amplifiers. This study considers backreflection lights from two sources, the continuous wave (CW) light at the CO (Reflection-I) and the modulated signal at the ONU (Reflection-II). It is confirmed, for the first time, that the impact of Reflection-II increases strongly with ONU gain. To estimate the impact of these backreflection lights, a simple intensity noise estimation scheme is presented. This scheme clarifies that the acceptable transmission line losses is 10 dB for 1.25 Gb/s under the optical return loss (ORL) of -32 dB.

AB - This paper investigates the impact of backreflection lights on upstream transmission in wavelength division multiplexing (WDM) single-fiber loopback access networks, where a WDM light source is located at the central office (CO) and each optical network unit (ONU) includes an optical modulator with optical amplifiers. This study considers backreflection lights from two sources, the continuous wave (CW) light at the CO (Reflection-I) and the modulated signal at the ONU (Reflection-II). It is confirmed, for the first time, that the impact of Reflection-II increases strongly with ONU gain. To estimate the impact of these backreflection lights, a simple intensity noise estimation scheme is presented. This scheme clarifies that the acceptable transmission line losses is 10 dB for 1.25 Gb/s under the optical return loss (ORL) of -32 dB.

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KW - Semiconductor optical amplifier

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KW - WDM

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