Abstract: A waveguide with a hollow core (16) delimited by a closed contour includes a succession of arcs (20) of negative curvature, each arc including a chord (24), characterized in that the contour of the hollow core (16) includes small arcs (PA) and large arcs (GA) arranged alternately, each arc (20) being symmetric with respect to a straight line passing through the center (18) of the hollow core (16) and the middle of the chord (24) thereof, the ratio b=2Ra/C of the large arcs being greater than 0.9 for the large arcs (GA), Ra corresponding to the maximum distance between the chord (24) and the arc (20), C corresponding to the length of the chord (24).
Type:
Grant
Filed:
June 4, 2014
Date of Patent:
November 7, 2017
Assignees:
UNIVERSITE DE LIMOGES, CNRS, GLOPHOTONICS
Abstract: A hollow core photonic crystal fiber (HCPCF) having a wavelength of operation, the HCPCF comprising: a core region having a first refractive index; a cladding region surrounding the core region and comprising a plurality of microcapillaries arranged in a transverse structure having a pitch, the pitch of the structure being at least five times larger than the wavelength of operation, the cladding region having a second refractive index higher than the first refractive index.
Type:
Grant
Filed:
September 24, 2008
Date of Patent:
November 6, 2012
Assignee:
GLOphotonics SAS
Inventors:
Abdel Fetah Benabid, Francois Yves Michel Denis Couny, Peter John Roberts