Demonstration of a narrowband Bragg-reflection filter in a single-mode fibre directional coupler

Whalen, M. S.; Divino, M. D.; Alferness, R. C.

doi:10.1049/el:19860465

Cited by 25 publications

(9 citation statements)

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“…The third general category of OADMs includes those based on grating assisted-contradirectional coupling in asymmetric couplers [12]- [16]. In this case, a grating is used to contradirectionally couple light between two otherwise dissimilar uncoupled waveguides.…”

Section: Introductionmentioning

confidence: 99%

Design considerations in optical add/drop multiplexers based on grating-assisted null couplers

Riziotis

Zervas

2001

J. Lightwave Technol.

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Abstract-The performance of a fully optimized optical add/drop multiplexer (OADM), based on null couplers and tilted Bragg gratings, is studied in detail. It is shown that maximization of the device performance involves three main optimization steps. First, the waveguide asymmetry ( 2 1 ratio) should be optimized in order to minimize the extinction ratio of the unwanted mode at the null coupler waist. Second, the coupler taper shape should be optimized in order to further minimize the aforementioned extinction ratio. Third, the grating tilt angle and relative width can be also optimized to give negligible backreflections at the input port and minimize radiation losses. The results show that the proposed high-performance OADM configuration can meet the stringent telecom specifications.

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Section: Introductionmentioning

confidence: 99%

Design considerations in optical add/drop multiplexers based on grating-assisted null couplers

Riziotis

Zervas

2001

J. Lightwave Technol.

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“…However, by placing identical gratings in two lengths of a fibre coupler, as in a Michelson arrangement, one can make a bandpass filter (Othonos 1997). Efficient bandpass filters were studied (Kashyap et al 1993;Bertolotti et al 1995;Ortega et al 1998;Whalen et al 1986;Kashyap 1999a), and an in-coupler Bragg grating filter demonstrated by Orlov et al (1997) is an attractive device due to its simplicity, requiring a single grating in the waist of a fused coupler. Bragg gratings incorporated into one core of fibre couplers for making add-drop WDM filters produce a backward-propagating wave if the wavelength of the input signal falls within its stop band.…”

Section: Optical Add-drop Multiplexersmentioning

confidence: 99%

A performance study of a nonlinear all Fibre Michelson interferometer, add-drop multiplexer, based in Fibre Bragg grating mirrors

et al. 2008

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In this paper we report a numerical investigation of an all-fibre narrowband transmission filter in the arrangement of two identical photo-imprinted Bragg gratings symmetrically located in each arm of a Michelson Interferometer, simulating, thus, an add-drop filter. The transmission characteristics and in addition the crosstalk level and extinction ratio, were studied. The coupled mode theory and the fourth-order Runge-Kutta method were applied, respectively, to solve the coupled differential equations. This is the first study, as far as we now, of the performance of this device considering the nonlinearity of the fibre coupler and linearity of the fibre Bragg gratings. The device is presenting a highly nonlinear behavior dependence in dephasing and pump power.

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“…If the coupling coefficients do not depend on , or vary very slowly (as in an adiabatic transition), we can postulate that the field components evolve as (11) which when used in (10) leads to (12) This is an eigenvalue equation that yields the (adiabatic) eigenvectors or supermodes and eigenvalues of the structure.…”

Section: Generalized Coupled Mode Theorymentioning

confidence: 99%

Supermodes of grating-coupled multimode waveguides and application to mode conversion between copropagating modes mediated by backward Bragg scattering

Peral

Yariv

1999

J. Lightwave Technol.

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Abstract-An analysis of multimode waveguides where several modes are coupled via quasiperiodic perturbations is presented. The supermodes (or eigenmodes) of the structure are derived and orthonormality considerations are discussed. In addition, a new type of mode converter between copropagating modes is proposed, where mode conversion is mediated by a backwardpropagating mode. Adiabatic and nonadiabatic coupling coefficients are considered and the supermode formalism is used to conveniently describe the mode of operation of the device.

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Demonstration of a narrowband Bragg-reflection filter in a single-mode fibre directional coupler

Cited by 25 publications

References 0 publications

Design considerations in optical add/drop multiplexers based on grating-assisted null couplers

Design considerations in optical add/drop multiplexers based on grating-assisted null couplers

A performance study of a nonlinear all Fibre Michelson interferometer, add-drop multiplexer, based in Fibre Bragg grating mirrors

Supermodes of grating-coupled multimode waveguides and application to mode conversion between copropagating modes mediated by backward Bragg scattering

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