Noise Suppression of Spectrum-Sliced WDM-PON Light Sources Using FP-LD

Abstract

ABSTRACT⎯We improved the performance of the spectrum-sliced light source for wavelength-divisionmultiplexed passive optical networks by employing a FabryPerot laser diode (FP-LD). We found that FP-LDs can suppress the intensity noise as significantly as using a gainsaturated semiconductor optical amplifier. The transmission characteristics were measured and analyzed both with and without employing an FP-LD.Keywords⎯Wavelength division multiplexed-passive optical network (WDM-PON), spectrum-slicing, amplitude squeezing, semiconductor optical amplifier (SOA).

Compactly packaged monolithic four-wavelength VCSEL array with 100-GHz wavelength spacing for future-proof mobile fronthaul transport

“…To save expenditure and bandwidth usage further, the CPRI should be operated in the wavelength division multiplexing (WDM) scheme with cost-effective light sources [5][6][7][8][9][10][11]. Many semiconductor laser sources have been examined for the purpose, including externally modulated lasers (EMLs), distributed Bragg reflectors (DBRs), and distributed feedback (DFB) lasers.…”

Demonstration of RSOA-Based 20 Gb/s Linear Bus WDM-PON with Simple Optical Add-Drop Node Structure

“…However, when the spectrum-slicing technique is used, it is often difficult to increase the transmission speed due to the high mode partition noise. One way to reduce this high intensity noise is to use a saturated semiconductor optical amplifier (SOA) or a Fabry-Pérot laser diode after an optical filter, which increases the noise intensity through spectrum slicing [3], [4]. For a WDM-PON configuration, a remodulation scheme, where a downstream optical signal is reused for upstream transmission, has been proposed based on a broadband optical gain medium for optical network terminals (ONTs), such as Fabry-Pérot laser diodes (FP-LDs) [5], [6], semiconductor optical amplifiers (SOAs) [7], or reflective SOAs (RSOAs) [8].…”

2.5 Gbps Direct Modulation of Reflective Semiconductor Optical Amplifier for Wavelength Division Multiplexing Passive Optical Network Colourless Sources

“…The remodulation scheme, in which a down-streamed signal from an optical line terminal (OLT) reused as an upstreaming signal at an optical network unit (ONU) by using colourless WDM-PON sources, is a promising approach. [1][2][3][4][5][6] A reflective semiconductor optical amplifier (R-SOA)based remodulation scheme is very attractive for realizing WDM-PON networks. 6,7) Using R-SOA at ONU, downstreamed data from OLT can be erased by the gain saturation property of R-SOA and new up-streaming data can be written and retransmitted to OLT by modulating R-SOA.…”