Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps

Abstract

, "Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps," Opt. Eng. 55(9), 096106 (2016), doi: 10.1117/1.OE.55.9.096106. Abstract. An architecture for flattened and broad spectrum multicarriers is presented by generating 60 comb lines from pulsed laser driven by user-defined bit stream in cascade with three modulators. The proposed scheme is a cost-effective architecture for optical line terminal (OLT) in wavelength division multiplexed passive optical network (WDM-PON) system. The optical frequency comb generator consists of a pulsed laser in cascade with a phase modulator and two Mach-Zehnder modulators driven by an RF source incorporating no phase shifter, filter, or electrical amplifier. Optical frequency comb generation is deployed in the simulation environment at OLT in WDM-PON system supports 1.2-Tbps data rate. With 10-GHz frequency spacing, each frequency tone carries data signal of 20 Gbps-based differential quadrature phase shift keying (DQPSK) in downlink transmission. We adopt DQPSK-based modulation technique in the downlink transmission because it supports 2 bits per symbol, which increases the data rate in WDM-PON system. Furthermore, DQPSK format is tolerant to different types of dispersions and has a high spectral efficiency with less complex configurations. Part of the downlink power is utilized in the uplink transmission; the uplink transmission is based on intensity modulated on-off keying. Minimum power penalties have been observed with excellent eye diagrams and other transmission performances at specified bit error rates.

Designing an optical frequency comb generator for visible light communication applications

“…For cascade technique, it adopted in [1]- [5], [7], [17]. Qu et al [1] proposed a novel scheme to generate flatter and stable OFC based on chirping of two stages MZM, the first stage used dual-drive MZM with high chirp factor and for increasing the comb lines used integrated MZM in the second stage.…”

“…Ferreira and Rocha [4] presented a theoretical study with three techniques for implementing comb generator based on cascade model of modulator, RFS and discrete mode laser, stimulated the proposed design by optiSystem and compered between them in the term of bit error rate (BER). Ullah et al [5] generating 60 comb lines with good power fluctuation about 0.7 dBm over 0.5 THz bandwidth based on a cascade module of pulsed laser diode, phase modulator and two MZMs. All modulators are driven by the same RF signal.…”

“…Optical frequency comb generator (OFCG) is a vital component source for many applications based on multi-wavelength sources such as optical frequency measurement, optical frequency division multiplexing (OFDM), microwave photonic signal processing, optical arbitrary waveform generation and dense wavelength division multiplexing [1]- [3]. the basic principle of OFCG is to generate a set of optical signals or harmonics from a single optical source with maximum exploitation of the optical bandwidth, the spacing between these harmonics is tunable [4], [5]. Can benefit of OFCG by reducing the optical sources in the optical line terminal (OLT) side with providing broad bandwidth and high transmission data rate [6].…”

Time–frequency-varying multicarrier generation using dynamic recirculating frequency shifter

“…Frequency-locking optical multicarrier has unparalleled advantages in fiber communications and optical sensing applications, such as wavelength division multiplexing (WDM) transmission, optical orthogonal frequency division multiplexing signal generation, spectral measurement, and analysis. [1][2][3] For example, an optical multicarrier source with high quality and a large number of carriers is a good candidate to serve as a laser array at the transmitter or a local oscillator array at the receiver side for ultra-high speed and high-spectrum efficiency optical transmission systems. For such applications, highly coherent optical multicarrier sources with stable flatness and uniform power distribution are desirable.…”

Proposing simulation model for multi‐wavelength source offering 40 Gbps WDM‐PON using AWG with a single laser

“…It is anticipated that requirement of transmission in multimedia and graphic rich services may reach to Gigabits per subscriber per second. Wavelength division multiplexed passive optical networking (WDM‐PON) is considered to be one of the optimum broadband optical access solution for such next generation optical access network . It is obligatory for the next generation access network to attain higher bandwidth for high data rate at lower cost.…”