Optimised GaN Directional Couplers with Mode Converters

Author(s):  
L. J. McKnight ◽  
Y. Zhang ◽  
I. M. Watson ◽  
E. Gu ◽  
S. Calvez ◽  
...  
2012 ◽  
Vol 37 (11) ◽  
pp. 2097 ◽  
Author(s):  
Rafael Gómez-Alcalá ◽  
F. Javier Fraile-Peláez ◽  
Pedro Chamorro-Posada ◽  
Francisco J. Díaz-Otero

Nanophotonics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 973-981 ◽  
Author(s):  
Han Yao ◽  
Fan Shi ◽  
Zhaoyang Wu ◽  
Xinzhu Xu ◽  
Teng Wang ◽  
...  

AbstractUsing an all-fiber mode selective coupler (MSC) at the visible band, here we experimentally demonstrate a generating and wavelength multiplexing scheme for the cylindrical vector (CV) and vortex beams (VBs). The proposed MSCs act as efficient mode converters to produce spectrally insensitive high-order modes (HOMs) at the wavelength ranging from 450 to 980 nm, which have broad operation bandwidth (more than 7 nm), high mode conversion efficiency (94%), and purity (98%), and low insert loss (below 0.5 dB). By adjusting the polarization state and the phase shift of linear polarization (LP)11 mode respectively, the donut-shaped CVs and circular-polarization VBs are achieved. The focused intensity distribution of the donut beam on the cross- and axial-sections is monitored by using a confocal system. The all-fiber solution of producing and multiplexing HOMs opens a new route for stimulated emission depletion microscopy applications.


1947 ◽  
Vol 35 (2) ◽  
pp. 160-165 ◽  
Author(s):  
W.W. Mumford
Keyword(s):  

2006 ◽  
Vol 51 (4) ◽  
pp. 385-389
Author(s):  
A. P. Krenitskii ◽  
V. P. Meshchanov ◽  
L. V. Shikova

2003 ◽  
Author(s):  
Jose R. Salgueiro ◽  
Maria C. Nistal ◽  
Vicente Moreno ◽  
Jesus Linares

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