| 1. |
- Dong, Hui, et al.
(författare)
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Generalized frequency dependence of output Stokes parameters in an optical fiber system with PMD and PDL/PDG
- 2005
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Ingår i: Optics Express. - 1094-4087. ; 13:22, s. 8875-8881
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Tidskriftsartikel (refereegranskat)abstract
- Dependence of output optical power, Stokes vector and degree of polarization on optical frequency is presented for an optical fiber system with both polarization mode dispersion and polarization-dependent loss or gain. The newly formulated equations are generalized for input light with arbitrary degree of polarization. The spectral resolved measurements of polarization mode dispersion using partially polarized light agree well with our theory.
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| 2. |
- Dong, Hui, et al.
(författare)
-
Generalized frequency dependence of output Stokes parameters in an optical fiber system with PMD and PDL/PDG
- 2005
-
Ingår i: Optics Express. - : Optica Publishing Group. - 1094-4087. ; 13:22, s. 8875-8881
-
Tidskriftsartikel (refereegranskat)abstract
- Dependence of output optical power, Stokes vector and degree of polarization on optical frequency is presented for an optical fiber system with both polarization mode dispersion and polarization-dependent loss or gain. The newly formulated equations are generalized for input light with arbitrary degree of polarization. The spectral resolved measurements of polarization mode dispersion using partially polarized light agree well with our theory.
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| 3. |
- Dong, Hui, et al.
(författare)
-
Measurement of Mueller matrix for an optical fiber system with birefringence and polarization-dependent loss or gain
- 2007
-
Ingår i: Optics Communications. - : Elsevier BV. - 0030-4018 .- 1873-0310. ; 274:1, s. 116-113
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Tidskriftsartikel (refereegranskat)abstract
- In an optical fiber system with both birefringence and polarization-dependent loss or gain (PDL/G), a set of input polarization states and their corresponding outputs are deduced to fulfill some general relationships in Stokes space, by considering the fact that the Mueller matrix of such an optical fiber system meets Lorentz transformation. Then, it can be proven that the minimum number of input polarization states is three for an explicit determination of such a Mueller matrix and no independent input parameter is redundant. Based on the theoretical findings, a general and simple approach is proposed to measure the Mueller matrix. The requirements regarding the choices of three inputs are presented for achieving optimum measurement stability and accuracy. Experimental results on an optical fiber system, formed by two 10-km long single-mode fibers with an optical isolator in between, show excellent agreement with the theory.
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| 4. |
- Korkmaz, Kadir Burak, et al.
(författare)
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CFD based form factor determination method
- 2021
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Ingår i: Ocean Engineering. - : Elsevier Ltd. - 0029-8018 .- 1873-5258. ; 220
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Tidskriftsartikel (refereegranskat)abstract
- The 1978 ITTC Power Prediction method is used to predict the propulsive power of ships through towing tank testing. The form factor approach and its determination in this method have been questioned. This paper investigates the possibility to improve the power predictions by introducing Combined CFD/EFD Method where the experimental determination of form factor is replaced by double body RANS computations applied for open cases KVLCC2 and KCS, including first-time published towing tank tests of KVLCC2 at ballast condition including an experimental uncertainty analysis specifically derived for the form factor. Computations from nine organisations and seven CFD codes are compared to the experiments. The form factor predictions for both hulls in design loading condition compared well with the experimental results in general. For the KVLCC2 ballast condition, majority of the form factors were under-predicted while staying within the experimental uncertainty. Speed dependency is observed with the application of ITTC57 line but it is reduced with the Katsui line and nearly eliminated by numerical friction lines. Comparison of the full-scale viscous resistance predictions obtained by the extrapolations from model scale and direct full-scale computations show that the Combined CFD/EFD Method show significantly less scatter and may thus be a preferred approach.
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