Hollow core optical fiber and a laser system
AssigneeNkt Photonics A/S
InventorsJens Kristian Lyngsøe, Christian Jakobsen, Mattia Michieletto
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Abstract
A hollow core photonic crystal fiber (PCF) including an outer cladding region and seven hollow tubes surrounded by the outer cladding region. Each of the hollow tubes is fused to the outer cladding to form a ring defining an inner cladding region and a hollow core region surrounded by the inner cladding region. The hollow tubes are not touching each other but are arranged with distance to adjacent hollow tubes. The hollow tubes each have an average outer diameter d2 and an average inner diameter dl, wherein d1/d2 is equal to or larger than about 0.8. Also, a laser system.
Claims20
A hollow core photonic crystal fiber (PCF) comprising an outer cladding region and exactly 7 hollow tubes surrounded by the outer cladding region, each of the hollow tubes having an average outer tube diameter d2 and an average inner tube diameter d1,
- wherein each of the hollow tubes is fused to the outer cladding region to form a ring defining an inner cladding region and a hollow core region surrounded by the inner cladding region,
- wherein the hollow tubes are not touching each other,
- wherein the hollow tubes are free of a nested sub-tube,
- wherein the hollow core region has a core diameter D of from about 10 μm to about 100 μm, and
- wherein d1/d2 is equal to or larger than about 0.8.
Dependencies are inferred from the claim text.