10-Gb/s operation of RSOA for WDM PON

Dept. of Electr. Eng., KAIST, Daejeon
IEEE Photonics Technology Letters (Impact Factor: 2.11). 10/2008; 20(18):1533 - 1535. DOI: 10.1109/LPT.2008.928834
Source: IEEE Xplore


We report on the 1O-Gb/s operation of the reflective semiconductor optical amplifier (RSOA) for the next-generation wavelength-division-multiplexed passive optical network (WDM PON). The bandwidth of the RSOA used in this experiment is merely 2.2 GHz. Nevertheless, a clear eye opening is obtained at 10 Gb/s by using the electronic equalizer processed offline. We investigate the impacts of the network's operating conditions (such as the injection power to the RSOA and the fiber length) on the performances of these equalizers. The results show that the RSOA-based WDM PON is operable at 10 Gb/s and the maximum reach can be extended to >20 km with the help of the forward error correction codes.

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    • "Among various solutions, the use of a reflective semiconductor optical amplifier (RSOA) in an ONU is a good candidate The long reach wavelength division multiplexing passive optical network (WDM-PON) with reflective optical network unit (R-ONU) have attracted more attention recently. This transport system, which integrate the advantages of hybrid dispersion compensating Copyright ⓒ 2015 SERSC Raman/EDFA[6] [7] [8] [9] amplifier and colorless ONU, have been developed with expectations for fiber optical communications that require high-speed bit rate, higher capacity and low cost in architecture. In such way, the long reach optical links must to suffer from the limitation of fiber loss, chromatic dispersion and noise. "

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    • "Further K. Y. Cho et. al. [3], proposed WDM-PON with 10Gb/s upstream and down-stream transmission. In this the bandwidth of RSOA is 2.2 GHz, and investigated for distance 20km, the optical power incident on the RSOA was -12 dBm and the upstream signal power received by the PIN receiver at the CO was -10 dBm. "

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    • "Recently, there have been several attempts to operate these low-bandwidth devices at 10-Gb/s and beyond, including advanced modulation formats [12]–[15], post detection electrical signal processing [16]–[18], and offset optical filtering together with electrical equalization [19]. Recently, H. Kim has proposed and demonstrated 10-Gb/s operation of a transistor-outlook (TO) can packaged RSOA using an optical delay interferometer (DI) [20]. "
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    ABSTRACT: This paper presents long reach wavelength division multiplexing passive optical network (WDM-PON) system capable of delivering downstream 20 Gbit/s data and upstream 10 Gbit/s data on a single wavelength. The optical source for downstream data and upstream data is mode locked laser at central office and reflective semiconductor optical amplifier (RSOA) at each optical network unit. We use two RSOAs at each optical network unit for the 10-Gb/s upstream transmission. The operating wavelengths of these RSOAs are separated by the free-spectral range of the cyclic arrayed waveguide gratings used at the central office and remote node (RN) for (de)multiplexing the WDM channels. We extend the maximum reach of this WDM PON to be 45 km by using Erbium-doped fiber amplifiers at the RN.The hybrid amplifier is designed to enhance the signal power and compensated the fiber dispersion over a wide wavelength range. Optical Equalization technique is used before the receiver to improve modulation bandwidth of an RSOA based colorless optical network unit. Optical Equalization technique helps to improve downlink and uplink performance. Author also investigates analysis of backscattered optical signal for upstream data and downstream data simultaneously. Bit error rate, backscattered optical signal power were measured to demonstrate the proposed scheme. In this paper Long reach and large data service aspects of a WDM-PON is presented.
    Full-text · Article · Aug 2014 · Optical and Quantum Electronics
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