US 12,135,453 B2
Reducing light-induced loss in optical fibre
Jens Lyngsø, Birkerød (DK); Cameron Smith, Birkerød (DK); Anders Harpøth, Birkerød (DK); Christian Jakobsen, Birkerød (DK); Thomas Tanggard Alkeskjold, Birkerød (DK); and Irnis Kubat, Birkerød (DK)
Assigned to NKT PHOTONICS A/S, Birkerød (DK)
Filed by NKT Photonics A/S, Birkerød (DK)
Filed on May 19, 2023, as Appl. No. 18/320,911.
Application 18/320,911 is a continuation of application No. 16/632,932, granted, now 11,698,484, previously published as PCT/EP2018/070038, filed on Jul. 24, 2018.
Claims priority of application No. 1711849 (GB), filed on Jul. 24, 2017.
Prior Publication US 2023/0305222 A1, Sep. 28, 2023
Int. Cl. G02B 6/02 (2006.01); G02F 1/365 (2006.01); G02F 1/35 (2006.01)
CPC G02B 6/02338 (2013.01) [G02B 6/02342 (2013.01); G02F 1/365 (2013.01); C03B 2201/12 (2013.01); C03B 2201/22 (2013.01); C03B 2201/28 (2013.01); C03B 2201/32 (2013.01); G02F 1/3528 (2021.01)] 28 Claims
OG exemplary drawing
 
1. A supercontinuum source, comprising:
a pump source; and
a supercontinuum generator configured for receiving electromagnetic radiation derived from the pump source and for generating supercontinuum radiation, the supercontinuum generator comprising a passive silica-based nonlinear microstructured optical fiber having a core region and a cladding region including longitudinally extending air-holes disposed about the cladding region,
wherein the core region has a core diameter of less than 5 μm,
wherein at least a part of the core region of the microstructured optical fiber is doped with a dopant that reduces light-induced non-bridging oxygen hole centre loss in the microstructured optical fiber, where the dopant is provided in a doped region of the core region, and the number of dopant atoms in the doped region is greater than 0.05% of the number of silicon atoms in the doped region, and
wherein the core region of the microstructured optical fiber further comprises hydrogen and/or deuterium.