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We review broadcasting signal transmission techniques in WDM-PONs. The broadcasting signals can be overlaid to WDM-PON signal with various multiplexing methods in wavelength, polarization, and RF domains.
We demonstrate a cost-effective WDM source for broadcast service using a reflective modulator (such as F-P LD or RSOA) with ASE injection. This optical source provides simple and high capacity broadcast services with direct modulation.
We propose a color-free 25-GHz-channel-spaced DWDM-PON by employing a pre-filter for reduction of the filtering effect. Transmissions of 10 and 50 km at 1.25-Gb/s/channel are demonstrated when BLS is at OLT and RN, respectively.
We propose a guideline of HPF (high pass filter) for improving tolerance toward optical in-band crosstalk in WDM-PON. A cut-off frequency of HPF should be higher than five times of linewidth for effectively reducing crosstalk.
We demonstrate broadcast signal transmission in a WDM-PON by using low noise broad-band light source based on a mutually injected Fabry-Pérot laser diodes. This novel multi-wavelength WDM source enables to transmit 2.5 Gb/s per channel.
We demonstrate an automatic wavelength control method using Rayleigh backscattering and wavelength modulation for tunable lasers in a WDM-PON. By measuring the spectrum of backscattered light, we identified and tracked the allocated wavelength.
We demonstrate a 80 Gb/s capacity (2.5 Gb/s × 32 channel) WDM-PON based on wavelength locked polarisation independent Fabry-Perot laser diode with transmission length of 20 km.
Based on a low-cost injection locked F-P LD WDM-PON, we have implemented a multicast network for video signal at 19.2Mbps and measured the packet loss.
WDM-PON can deliver huge bandwidth to customer premises with protocol transparency. This feature enables application of WDM-PON beyond last mile access. The colorless transceiver can simplify management of system considerably.
We propose a color-free DWDM-PON at 50 GHz channel spacing by using the triple contact F-P LD. The transmission length of 30 km and 90 km are demonstrated with and without FEC at 1.25 Gb/s-per-channel.
We investigate the effect of polarisation dependent loss (PDL) in wavelength division multiplexing-passive optical network (WDM-PON) with injection seeded reflective semiconductor optical amplifier (RSOA). The PDL can give a serious penalty on the system performance.
We demonstrate 40-km-reach 32-channel gigabit wavelength division multiplexing-passive optical network (WDM-PON) based on Fabry-Perot laser diode with external ASE injection. The dispersion, back-reflection and crosstalk effects in WDM-PON are also investigated.
We propose a novel WDM source for broadcast service using a low-cost Fabry-Perot LD with broadband ASE injection. The proposed optical source provides a cost-effective WDM-PON architecture for broadcast service accommodating more than 32times622 Mb/s.
We demonstrate a 40 Gb/s capacity (1.25 Gb/s times 32 channel) WDM-PON based on wavelength locked Fabry-Perot laser diodes with a high immunity to the optical back reflection.
We propose and demonstrate a simple decision threshold control circuit. By employing this method, we demonstrate a feasibility of WDM-PON at 1.25 Gb/s per channel with 100 GHz spacing based on the wavelength-locked F-P LDs.
We propose and demonstrate a low cost wavelength division multiplexing-passive optical network (WDM-PON) based on the spectrum sliced Fabry-Perot laser diodes (F-P LDs). By using cyclic arrayed waveguide gratings (AWGs), we achieve color-free operation with decision threshold control.
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