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We propose a novel carrier phase estimation method for the high-speed coherent WDM PON based on the reflective semiconductor optical amplifier (RSOA). By using this method, we can utilize a cost-effective DFB laser as the seed light in such a network due to its fast trackability. We experimentally achieve an excellent receiver sensitivity of −30.8 dBm even when a DFB laser (linewidth: 3 MHz) is used...
We evaluate the transmission performances of 28-Gb/s polar RZ PAM-N (N=2, 3, 4, and 5) upstream signals in 20-km long loopback SSMF link by using a directly-modulated RSOA and direct-detection receiver.
A 1.25 Gb/s ASK PON system with −51dBm sensitivity (at BER=2−103) is enabled by a polarization-independent coherent receiver that needs no DSP (nor ADC). The system just uses common DFBs and commercial electronic devices and has 52 dB dynamic range.
This paper presents a scalable energy-efficient MAC/PHY protocol for building a metro/access network. The proposed cascaded bit-interleaving (CBI) protocol extends the previously reported bit-interleaving concept to a multi-level paradigm. Moreover, a 40Gb/s 3-level electrical duobinary based physical layer scheme has been proposed for cost and energy saving, especially for end terminals. We compared...
We demonstrate a coherent OFDM-PON based on a simplified coherent receiver, which exploits a DFB local oscillator without phase/frequency locking. We achieve ultra-narrow channel spacing (Δν = 1.6 GHz) and high-power budget (43 dB/35 dB) for 1.25/10 Gb/s.
A high-level optical access network based on coherent technology supporting ultra-dense Wavelength Division Multiplexing (WDM) is developed in the EU FP7 COCONUT project (COst-effective COherent ultra-dense-WDM-PON for lambda-To-the-user access networks). The COCONUT network should allow for seamless evolution from present PON architectures, and also support new emerging applications such as mobile...
This paper presents an experimental demonstration of VCSEL-based PON with simplified real-time coherent receiver at 2.5 Gbps. Receiver sensitivity of −37 dBm is achieved proving splitting ratio up to 2048 after 17 km fiber transmission.
This paper reports performance tests on a DC-coupled 10Gb/s burst-mode receiver with on-chip reset, designed for 10G-GPONs. Record short 2R settling time, high sensitivity and large loud/soft ratio is demonstrated in burst-mode operations at 2.5G/5G/10Gb/s.
A burst mode receiver designed for 10G-GPON systems was tested in a packet-optical add/drop multiplexer metro network. Fast power dynamic range and OSNR tolerance recordings demonstrate that this receiver is compliant with metro network requirements.
We probe the limits, both experimentally and analytically, of passive optical network (PON) monitoring using periodic coding technology. The experimental demonstration focuses on a 16 customer PON with a 20 km feeder fiber followed by either a single cluster or a tiered hierarchy. A directly modulated laser modulated at 1 GHz was used to generate the monitoring probe signals. The measured data from...
We generate the QPSK signal by utilizing the chirp characteristics of the directly modulated RSOA for the high-speed coherent WDM PON. In addition, we demonstrate the error-free transmission of the 5-Gbps QPSK signal generated by using this technique over 100-km long fiber link without using any optical amplifiers and electronic equalizers.
Bidirectional transmission at 10 Gbit/s using 3.125 GBaud PDM-QPSK over 100 km of SMF is investigated. We observe no penalty for transmission of 10 GHz spaced channels. Preamplification improves the receiver sensitivity from -45.9 dBm to -53.0 dBm.
This paper reports a high performance DC-coupled 10Gbit/s optical burst-mode receiver for symmetric 10G-GPONs. The measured receiver sensitivity is −30.0dBm at BER=10−3 within a short settling time of 51ns, and a loud/soft ratio wider than 24.0dB.
We propose FSK/ASK re-modulation WDM-PON with coherent receiver. Apparent BER improvement is obtained by utilizing FSK image rejection receiver, especially for long distance transmission. Parameters in image rejection receiver which affect the system performance are analyzed. Results show that the presented scheme is promising in super long reach access network.
We propose and demonstrate a 1.25-Gb/s RSOA-based WDM PON employing a novel self-homodyne receiver. The proposed receiver enables the excellent receiver sensitivity and reflection tolerance, and has potential applications in the long-reach WDM PON with high-split ratio.
We present a 10 Gb/s burst-mode receiver featuring automatic reset generation. The measured sensitivity is -12.5 dBm at a loud/soft ratio of 11.5 dB with a guard time of 25.6 ns and a short preamble of 23.8 ns.
A burst-mode receiver using high-power-tolerant APD for co-existence of 10-/1 Gbps-PON systems was demonstrated. An inter-burst dynamic range as large as 25 dB for both 10 and 1 Gbps at a fixed APD bias voltage was attained.
We propose a novel 9b10b line code suitable for the XG-PON1 2.5Gb/s upstream. It provides a good balance of line conditioning and efficiency. We show that this line code outperforms the scrambled NRZ code.
A high-sensitivity transimpedance amplifier (TIA) for Gigabit Ethernet passive optical network (GE-PON) system is designed in 0.35-mum BiCMOS technology. This amplifier has a 1.37-GHz bandwidth and 55 k transimpedance gain. Also it exhibits a high sensitivity of -31.1 dBm at 1.25 Gbps with a PIN-PD instead of APD, which provides a low-cost and high-performance FTTH solution.
We propose an inexpensive multilevel transmission system that uses several laser diodes (LDs) of different wavelengths and receives each stream as a block. To compensate for the skew induced by group velocity dispersion (GVD), we propose a dynamic skew compensation method and fabricate a prototype LSI. Experiments show that 5 Gbps transmission can be achieved in a network (NW) with a loss budget only...
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