Impact of dispersion on the bandwidth of long-period fiber-grating filters

Stegall, D.

doi:10.1109/ofc.1998.657401

Cited by 3 publications

(2 citation statements)

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“…Therefore, in order to increase the precision of the simulation result, we do not use any approximation to solve the dispersion relation, such as is used in Ref. 10.…”

Section: Fundamental Characteristics and Couplingmentioning

confidence: 99%

“…[4][5][6][7] So far, all investigations of the spectra of LPGs have emphasized the coupling between the core mode HE 11 and low-order cladding modes. [8][9][10][11] It is well known that the LPG has considerably greater bandwidth than the reflection fiber Bragg grating, whose spectrum is formed by coupling the forward-propagating core mode to the backwardpropagating core-cladding modes. Consequently, it seems impossible to use an LPG to design wavelength-division multiplexing ͑WDM͒ components, not to mention conforming to the dense wavelength-division multiplexing ͑DWDM͒ standard.…”

Section: Introductionmentioning

confidence: 99%

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Spectrum analysis for high-order cladding modes based on long-period fiber gratings

Huang

2006

Opt. Eng

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The spectrum characteristic for the coupling between the core mode HE 11 and high-order cladding modes based on long-period fiber gratings ͑LPGs͒ is investigated with the aim of supplying a concrete concept to design narrow-bandwidth optical devices. In contrast to the better-known coupling between the core mode and low-order cladding modes, numerical simulation has shown that a 0.4-nm FWHM can be achieved by properly designing the period of the LPG in choosing the high-order cladding modes. In any case, in order to ensure that the analytic result for high-order cladding modes is meaningful, the validity of two-mode coupled-mode equations is also proved from the three-mode coupled-mode equations. According to this concept, LPG can be used to design not only gain flatteners that have wide bandwidth but also optical communication components that have narrow bandwidth to meet the ITU standard for a DWDM system.

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“…Therefore, in order to increase the precision of the simulation result, we do not use any approximation to solve the dispersion relation, such as is used in Ref. 10.…”

Section: Fundamental Characteristics and Couplingmentioning

confidence: 99%