All-fiber Fourier filter flat-top interleaver design with specified performance parameters

Wang, Qijie; Liu, Tong; Soh, Yeng Chai; Zhang, Ying

doi:10.1117/1.1613279

Cited by 27 publications

(7 citation statements)

References 8 publications

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“…As shown in the previous section, the desired coupling ratios are obtained as 1 ϭ0.52%, 2 ϭ75.89%, and 3 ϭ33%. Using the fabrication technique, 5 the two lattice filters are made separately by fabricating three fiber couplers successively on two piece fibers. This fabrication technique does not require any splicing so it eliminates the possible splicing loss.…”

Section: Resultsmentioning

confidence: 99%

Gaussian-like spectrum equalization using an all-fiber lattice filter with symmetric feedback structure

Zhang

2005

Opt. Eng

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Abstract.We present an all-fiber filter with symmetric forward and feedback lattice structures. Using the proposed filter, Gaussian-like spectra can be equalized in the maximally flat sense while the output power is maximized. As an illustrative example, the proposed filter is designed to flatten the output spectrum of a superluminescence light-emitting Diode (SLED). Compared to existing filters, the proposed filter achieved better performance in experiments.

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Section: Resultsmentioning

confidence: 99%

Gaussian-like spectrum equalization using an all-fiber lattice filter with symmetric feedback structure

Zhang

2005

Opt. Eng

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“…However, in order to realize flattop interleavers, interferometers with two or more stages have to be employed, e.g., cascaded MZI and multi-cavity etalons in FIR and IIR structures, respectively. For example, FIR lattice structures [2][3][4][5][6][7][8] using cascaded multi-stage MZI are commonly used to build flattop interleavers with different architectures based on planar waveguides [3], fiber couplers [4][5], optical glass pairs [6], and high birefringence (Hi-Bi) fibers [7][8]; IIR structures using multi-cavity etalon [9][10] or cascaded RR [11] are also commonly used.…”

Section: Introductionmentioning

confidence: 99%

Design optimization of flattop interleaver and its dispersion compensation

Wei¹,

Lit²

2007

Opt. Express

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Abstract:The objective of this paper is to present a general strategy for design optimization of flattop interleavers, and dispersion compensation for the interleavers, in order to achieve superior optical performance. The interleaver is formed by two multi-cavity Gire-Tournois etalons (MC-GTE) in a Michelson Interferometer (MI). An interleaver that has m cavities in one etalon and n cavities in the other is called an mn-GTE interleaver. Our optimization strategy exploits the general flattop condition and the technique of ripple equalization. Any mn-GTE interleaver may be optimized. The spectral performance can be greatly improved by the optimization process. As an illustration, we present a comprehensive analysis for a 11-GTE and a 21-GTE interleaver. The analytical expressions for flattop conditions, peak and trough positions are derived for optimization. The optimal performance of the interleavers can be controlled by the reflection coefficients and the parameters m and n. To achieve lowdispersion mn-GTE flattop interleavers, we propose to use one additional MC-GTE as a dispersion compensator to compensate for the chromatic dispersion. The analytical expressions of group delays and chromatic dispersions for an MC-GTE interleaver are derived. The optimization strategy of dispersion-ripple equalization is explained. The results show that the dispersion performance can be tailored by changing the reflection coefficients of the MC-GTE, and the dispersion and bandwidth can be enhanced by increasing the number of cavities of the MC-GTE.

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“…proposed [122]. To the best of our knowledge, it is the first demonstration for such kind of fabrication in the literature.…”

Section: Fabrication and Experimental Resultsmentioning

confidence: 85%

“…The length difference of fiber coupler arms connecting to FBGs is controlled at 2 mm. This is accomplished by first setting the length difference roughly as 2 mm in splicing, and then stretching one of the fiber arms by thermal heating [122].…”

Section: Resultsmentioning

confidence: 99%

“…The first is to use a number of optical elements with finite impulse responses [37][38][39]. For example, the Fourier Filter Flat-Top (F 3 T) interleavers in [37,122], using several cascaded modified MZIs, basically have FIR responses. In these designs, by carefully controlling the path length difference, the channel spacing can be set to the desired value and matched very well to the ITU grid [123].…”

Section: Introductionmentioning

confidence: 99%

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Optical filter banks : structure, design and implementation

Wang¹

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All-fiber Fourier filter flat-top interleaver design with specified performance parameters

Cited by 27 publications

References 8 publications

Gaussian-like spectrum equalization using an all-fiber lattice filter with symmetric feedback structure

Gaussian-like spectrum equalization using an all-fiber lattice filter with symmetric feedback structure

Design optimization of flattop interleaver and its dispersion compensation

Optical filter banks : structure, design and implementation

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