Temat: dark - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Focusing properties of partially coherent dark hollow Gaussian beams through a thin lens system
Autorzy:: Dong, Y
Zhao, C
Wang, K
Cai, Y
Powiązania:: https://bibliotekanauki.pl/articles/175075.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: focusing properties
partially coherent
dark hollow beam
focal shift
Opis:: This paper investigated the focal shift of partially coherent dark hollow Gaussian beams through a thin lens system. An analytic expression of the irradiance distribution of the focusing partially coherent dark hollow Gaussian beams in the back focal plane has been given by using the Collins formula. The focus shift of focused partially coherent dark hollow Gaussian beams in different parameters is studied in detail by numerical calculations. It is found that the absolute value of the focal shift of partially coherent dark hollow Gaussian beams decreases as the transverse coherence width or the order of the dark hollow Gaussian beams or a parameter of the dark hollow Gaussian beams increases.
Źródło:: Optica Applicata; 2015, 45, 2; 151-161
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: The kurtosis parameter of partially coherent controllable dark hollow beams in free space
Autorzy:: Li, J.
Wang, W W
Lai, Y
Powiązania:: https://bibliotekanauki.pl/articles/173815.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: kurtosis parameter
partially coherent controllable dark hollow beams
free space
Opis:: Based on the extended Huygens–Fresnel principle and the definition of second-order moments of the Wigner distribution function, the analytical expression for the kurtosis parameter of partially coherent controllable dark hollow beams in free space is derived, and used to study the influence of beam parameters on the kurtosis parameter. It is shown that the kurtosis parameter increases with increasing the wavelength and the waist width, or decreasing the scaling factor, however, the effect of the beam order and the spatial correlation length on the kurtosis parameter depends on the propagation distance. The results can be interpreted physically.
Źródło:: Optica Applicata; 2014, 44, 4; 533-543
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Generation of optical needle and dark channel by tight focusing of radially polarized circular partially coherent beams
Autorzy:: Lin, Huichuan
Li, Yan
Zhou, Xiaoming
Wang, Juanjuan
Chen, Ziyang
Pu, Jixiong
Powiązania:: https://bibliotekanauki.pl/articles/174800.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: tight focusing
radially polarized
circular partially coherent
optical needle
dark channel
Opis:: We theoretically investigate the tight focusing of radially polarized circular partially coherent(RPCPC) beams through a high numerical aperture objective. The sub-wavelength super-long optical needle and dark channel can be obtained near the focus, by engineering the source coherent length of the incident RPCPC beams. The length of the optical needle and the dark channel can be adjusted, and the obtained maximal lengths of the optical needle and the dark channel are both 22λ.The full width at half maximum of the optical needle and the dark channel are 0.6λ and 0.48λ, respectively.
Źródło:: Optica Applicata; 2020, 50, 2; 229-240
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Transmission stability of chirped dark vector quasi-solitons in birefringent fiber system with nonlinear gain
Autorzy:: Xiao, Yan
Zhang, Jing
He, Qi
Powiązania:: https://bibliotekanauki.pl/articles/1835764.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: chirped dark vector quasi-soliton
coupled Ginzburg-Landau equation
birefringent fiber
Opis:: In this article, we consider the coupled Ginzburg–Landau equation with variable coefficients including the nonlinear gain and obtain the exact solutions of chirped dark vector quasi-solitons via the ansatz method. Next, the propagation of chirped dark vector quasi-solitons is discussed to verify whether they can be transmitted stably in the birefringent optical fiber system. The numerical simulation shows that this can be achieved. We deeply add the small perturbation to the transmission of dark vector quasi-solitons to make the results above more general. The results further prove the correctness of our solutions.
Źródło:: Optica Applicata; 2021, 51, 1; 51-58
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

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