Tunable dispersion and dispersion slope compensators for 10 Gb/s using all-pass multicavity etalons

Performance of Optical OFDM in Ultralong-Haul WDM Lightwave Systems

“…LECTRONIC dispersion compensation (EDC) [1]- [3] is an alternative to optical dispersion compensation techniques such as dispersion compensating fiber (DCF) [4], Bragg gratings [5], and optical resonators [6]. Although EDC normally requires separate electronics for each wavelength-division multiplexed (WDM) channel, whereas optical techniques can compensate multiple WDM channels simultaneously, it is attractive because 1) it can easily be made adaptive to compensate for temporal variations in dispersion; 2) its ability to self-adapt means it offers plug and play functionality (rather than requiring design of a dispersion map [7]); 3) self-adaptation is useful for optically switched networks where the physical path between the transmitter and receiver will depend how the wavelengths are routed; 4) EDC is usually located at the ends of the link, so that it requires less outside plant than for DCF; 5) if data rates are being upgraded from say 2.5 to 10 Gb/s, the outside plant may not require modification if EDC is used, whereas optical dispersion compensation may require DCF to be placed along the fiber spans; and 6) optical dispersion compensation incurs optical loss, so that it requires additional amplification.…”

Performance Evaluation of A Tunable Dispersion Compensator based on Strain-Chirped Fiber Bragg Grating in a 40 Gb/s Transmission Link

“…To resolve this problem, various types of tunable optical dispersion compensators using different technologies, such as a chirped fiber Bragg grating (FBG), an all-pass multicavity etalon, arrayed-waveguide grating, a Mach-Zehnder interferometer and a planar lightwave circuit lattice-form filter, have been proposed and demonstrated [1][2][3][4][5]. Among them, the chirped FBG based tunable dispersion compensator is an attractive solution for the dispersion management in high-speed optical transport networks, since it can provide high dispersion, wide passband for high bit-rate applications and wide tunability [1,[6][7][8].…”

Novel complex gratings with third-order group-delay variations for tunable pure dispersion slope compensation

“…Inter-channel dispersion slope is where the different channels experience different amount of dispersion, this especially impacts on wavelength division multiplexing (WDM) systems and needs to be carefully considered when the bit rate is 10Gb/s or beyond. There are many schemes proposed to solve the inter-channel dispersion slope problem, such as multi-channel fiber Bragg gratings (FBGs) [1,2], ring resonators [3], and Gires-Tournois etalons [4,5]. Intra-channel dispersion slope is where the dispersion experienced by each wavelength component within an optical pulse is different, this distorts the signals within each channel.…”