Design of short length and C+L-band mismatched optical coupler with waveguide weighted by the Blackman function

Chen, Chi Feng; Ku, Yun Sheng; Kung, Tsu Te

doi:10.1016/j.optcom.2008.10.012

Cited by 7 publications

(8 citation statements)

References 13 publications

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“…The splitting ratio from 100:0 to 50:50 can be obtained by an asymmetric multimode interference (MMI) region, one of which corners is slightly removed. However, the above broadband MMI power splitters still have weak wavelength dependence.Adiabatic directional couplers (ADCs) with excellent performance for wavelength independence are presented [12][13][14][15][16][17][18][19][20][21]. ADCs have other advantages, such as polarization insensitivity [18,19,21] and relaxed fabrication tolerance [18][19][20][21].…”

mentioning

confidence: 99%

“…However, the above broadband MMI power splitters still have weak wavelength dependence.Adiabatic directional couplers (ADCs) with excellent performance for wavelength independence are presented [12][13][14][15][16][17][18][19][20][21]. ADCs have other advantages, such as polarization insensitivity [18,19,21] and relaxed fabrication tolerance [18][19][20][21]. Two types of ADC were investigated: one with weighted propagation and coupling coefficients [15][16][17][18][19][20][21] and the other with constant propagation coefficients and weighted coupling coefficients [12][13][14].…”

mentioning

confidence: 99%

“…ADCs have other advantages, such as polarization insensitivity [18,19,21] and relaxed fabrication tolerance [18][19][20][21]. Two types of ADC were investigated: one with weighted propagation and coupling coefficients [15][16][17][18][19][20][21] and the other with constant propagation coefficients and weighted coupling coefficients [12][13][14]. The coupler with weighted propagation and coupling coefficients results in the structure of coupling-weighted and velocity-tapered waveguides (CVW).…”

mentioning

confidence: 99%

“…The coupler with weighted propagation and coupling coefficients results in the structure of coupling-weighted and velocity-tapered waveguides (CVW). CVW couplers have recently made use of an optical switch [15][16][17][18][19] and splitter [20,21]. The gradual change of the CVW structure causes normal mode evolution, which is involved to the changeable propagation and coupling coefficients [15][16][17][18][19][20][21].…”

mentioning

confidence: 99%

“…CVW couplers have recently made use of an optical switch [15][16][17][18][19] and splitter [20,21]. The gradual change of the CVW structure causes normal mode evolution, which is involved to the changeable propagation and coupling coefficients [15][16][17][18][19][20][21]. The properties of switching [15][16][17][18][19] and splitting [20,21] can be obtained as the de-phasing variations and coupling coefficients are appropriately selected.…”

mentioning

confidence: 99%

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A Numerical Solution for Broadband PLC Splitter with Variable Splitting Ratio Based on Asymmetric Three Waveguide Structures

2019

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A numerical solution for the broadband planar-lightwave-circuit (PLC) splitter with a variable splitting ratio based on asymmetric three waveguides weighted by the Blackman weighting function is designed for passive optical network applications with wavelengths between 1.53 and 1.57 µm. The performance of the proposed splitter is verified using the beam propagation method (BPM). It was found that a polynomial function of the splitting ratios accompanying a geometrical shift can be derived from the proposed splitter. The splitting ratio can be changed from 50:50 to 90:10 with this geometrical shift. The excess loss, crosstalk, polarization dependent loss, and splitting ratio variations against wavelength of the proposed splitter with wavelengths between 1.53 and 1.57 µm are better than 0.139 dB, −22.75 dB, 0.006 dB, and 0.335%, respectively. Obviously, the proposed splitter with variable splitting ratio retains the advantages of the symmetric design, such as low excess loss, low crosstalk, polarization insensitivity, broadband, and wavelength insensitivity.

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