Dispersion cancellation using linearly chirped Bragg grating filters in optical waveguides

Ouellette, Francois

doi:10.1364/ol.12.000847

Cited by 457 publications

(183 citation statements)

References 14 publications

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“…From [5], it is apparent that in case of a UFBG when the non uniform input pulse would be applied to strong grating, the bandwidth of reflectivity would be increased, but the GVD has shown larger deviation with linearity in the central region of reflectivity spectrum. Using the complicated refractive index profile can compensate this nonlinearity [12,13]. We can further conclude that this feature can be used to maintain an optical power level, in the same time maintaining a low dispersion in DWDM optical link.…”

Section: Controlling the Dispersion And Peak Reflectivity Due To An Amentioning

confidence: 68%

Dispersion and Peak Reflectivity Analysis in a Non-Uniform FBG Based Sensors Due to Arbitrary Refractive Index Profile

Raghuwanshi¹,

Kumar²,

Srinivas³

2012

PIER B

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Abstract-This paper deals with a group velocity dispersion issue and a peak reflectivity issue in a non-uniform fiber Bragg gratings (FBG) due to an arbitrary refractive index profile along the length of grating. The paper shows that by using more complicated refractive index profile one can significantly reduce the group velocity dispersion and side lobes intensity and that in main lobe the bandwidth of reflectivity would also increase substantially due to a complicated refractive index profile. To the authors' knowledge, there has not been any work reported in this direction. Generally, coupled mode theory is used to analyze the uniform fiber Bragg grating (UFBG). The analysis results in two coupled first order ordinary differential equations with constant coefficients for which closed form solutions can be found for appropriate boundary conditions. Most fiber gratings designed for practical applications however are non uniform. The main reason for using non uniform grating is that it reduces the side lobes in the reflectivity spectrum. Due to the complexity of analysis, no particular method for an analysis of the non-uniform fiber Bragg grating would be found. The two standard approaches for calculating the reflection and transmission spectra of a non uniform FBG are direct numerical integration of coupled mode equations and piecewise uniform approximation approach. The former is more accurate but computationally intensive. In this paper, piecewise uniform approximation approach is used to study a dispersion characteristic due to an arbitrary refractive index profile. The usefulness in FBG based sensors has been demonstrated.

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Section: Controlling the Dispersion And Peak Reflectivity Due To An Amentioning

confidence: 68%

Dispersion and Peak Reflectivity Analysis in a Non-Uniform FBG Based Sensors Due to Arbitrary Refractive Index Profile

Raghuwanshi¹,

Kumar²,

Srinivas³

2012

PIER B

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“…This level of dispersion is achieved at the expense of a fibre core diameter reduction, which in turn increases the optical loss and limits the levels of optical power that can be sustained without inducing non-linear effects. Fibre chromatic dispersion compensation using highly reflective CFBGs is based on the introduction of wavelength-specific time delays through the use of precisely designed CFBGs (Ouelette 1987). By combining such a CFBG with a three-port optical circulator, a compact and effective dispersion compensation module can be readily realised.…”

Section: Fbg Telecommunication Applications In Compensation and Signamentioning

confidence: 99%

Signal Processing, Management and Monitoring in Transmission Networks

Vázquez

Montalvo

Ahmed

et al. 2011

Optical Transmission

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1higher, linear and non-linear fibre impairments become prominent factors affecting the signal quality. Thus, new techniques in both physical layer and network layer are necessary for mitigating impairments to accommodate high-speed traffic (Tomkos et al. 2002). On the other hand, the flexibility of modern networks with dynamic and distributed management, where lightpaths can be dynamically and automatically assigned end-to-end, increases the risk of changing path conditions that affect signal quality and consequently quality of service (QoS) over the lifetime of a connection as well as for subsequent connection set-up requests (on-demand routing and wavelength assignment -RWA). For traditional connection provisioning an ideal physical layer, ignoring transmission impairments (Chlamtac et al. 1992) could be assumed because the implicit per hop regeneration (optics-to-electronics-to-optics conversion -O/E/O) compensated signal impairments hop-by-hop in a rather static manner (section commissioning). For end-to-end all-optically switched connections using photonic cross-connect switches (PXC), the conditions change and common practice is not applicable. Anyhow, intelligent connection provisioning is an important traffic engineering problem, and minimising operational cost as well as efficiently utilising network resources is the main driver. In this context, it seems important to have flexible routing protocols that take into consideration the most relevant physical impairments, and are able to exchange messages with their values as part of the route information with others. This condition, if definitely used to calculate routing, will surely assure better success in data delivery over the network (Huang et al. 2005). Irrespective of the control architecture chosen by an operator of an optical network, the included control plane (in charge of setting up and tearing down optical circuits; also known as lightpaths) needs to have a proper set of tools to satisfyingly deal with physical impairments. The most essential tools are: optical signal monitoring, signal processing and impairment compensation techniques (each all-optically and/or electrically). With the help of these tools, it is possible to predict the QoT (quality of transmission) attainable for a lightpath at a given time (i.e. the latest network-wide monitoring instant), and the control plane can route requests across the network

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“…It has been considered that the system may have axially nonuniform parameters and the fiber dispersion is not necessarily weak, hence the resulting formula is able to operate in a wide range of applications with satisfactory accuracy. Recently dispersion and nonlinear effects in optical fibers have been studied extensively [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Although different aspects of fibers have been considered but a low concentration on designing of the fiber using analytical formulation has been done.…”

Section: Introductionmentioning

confidence: 99%

Analytical Investigation and Evaluation of Pulse Broadening Factor Propagating Through Nonlinear Optical Fibers (Traditional and Optimum Dispersion Compensated Fibers)

Andalib¹,

Rostami²,

Granpayeh³

2008

PIER

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Abstract-In this paper, analytical relation for pulse width evolution and broadening in fiber systems using the Volterra series transfer function (VSTF) in linear and nonlinear cases are derived. This evaluation is done for traditional and optimum dispersion compensated fibers. Effects of group velocity dispersion (GVD) and self-phase modulation (SPM) are taken into account. It is shown that the analytical formulation can be applied to design and analysis the long hauls practical systems, and is helpful in understanding the pulse distortion caused by the interaction between SPM and GVD. The proposed relations are extracted analytically and for the first time pulse broadening factor in general case is derived.

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Dispersion cancellation using linearly chirped Bragg grating filters in optical waveguides

Cited by 457 publications

References 14 publications

Dispersion and Peak Reflectivity Analysis in a Non-Uniform FBG Based Sensors Due to Arbitrary Refractive Index Profile

Dispersion and Peak Reflectivity Analysis in a Non-Uniform FBG Based Sensors Due to Arbitrary Refractive Index Profile

Signal Processing, Management and Monitoring in Transmission Networks

Analytical Investigation and Evaluation of Pulse Broadening Factor Propagating Through Nonlinear Optical Fibers (Traditional and Optimum Dispersion Compensated Fibers)

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