Method and apparatus relating to optical fibers
AssigneeCrystal Fibre A/S
InventorsTimothy Adam Birks, Jonathan Cave Knight, Philip St. John Russell, Brian Joseph Mangan
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Abstract
A method of joining a first optical fiber (110) to a second optical fiber (130) comprises the steps of: (i) providing a preform element (10) comprising material defining a primary elongate cavity (40); (ii) inserting the first optical fiber (110) into the primary cavity (40) to form a preform (125); and (iii) drawing the second optical fiber (130) from the preform (125); wherein, the second optical fiber (130) includes a core region comprising material that has been drawn from the first optical fiber (110).
Claims67
An optical fibre transformation device, comprising at one end a length of a preform element including a length of a first fibre inside a first hole, the other end comprising a second fibre that is a photonic crystal fibre, and a gradual transition from the first fiber to the second fiber.
A preform element comprising a primary elongate cavity large enough to receive a first optical fibre and a secondary elongate cavity, such that, when an assembly of the preform element and a first optical fibre is drawn down in size a second optical fibre is formed, the second fibre being a photonic crystal fibre with a core incorporating the first fibre and a cladding incorporating the secondary elongate cavity.
A method of joining a first optical fibre to a second optical fibre, the method comprising the steps of:
- (i) providing a preform element comprising material defining a primary elongate cavity;
- (ii) inserting the first optical fibre into the primary cavity to form a preform;
- and (iii) drawing the second optical fibre from the preform;
- wherein, the second optical fibre includes a core region comprising material that has been drawn from the first optical fibre, in which the preform includes a secondary elongate cavity that does not receive an optical fibre.
A method of joining a first optical fibre to a second optical fibre, the method comprising the steps of:
- (i) providing a preform element comprising material defining a primary elongate cavity;
- (ii) inserting the first optical fibre into the primary cavity to form a preform;
- and (iii) drawing the second optical fibre from the preform;
- wherein, the second optical fibre includes a core region comprising material that has been drawn from the first optical fibre, in which the preform element is formed by stacking a plurality of elements.
A method of joining a first optical fibre to a second optical fibre, the method comprising the steps of:
- (i) providing a preform element comprising material defining a primary elongate cavity;
- (ii) inserting the first optical fibre into the primary cavity to form a preform;
- and (iii) drawing the second optical fibre from the preform;
- wherein, the second optical fibre includes a core region comprising material that has been drawn from the first optical fibre, in which the first fibre is a photonic crystal fibre.
An optical device comprising a first optical fibre and a second optical fibre having a core region and a cladding region, wherein the core region of the second optical fibre comprises material that has been drawn from the first optical fibre, in which the second fibre is a photonic-crystal fibre.
An optical device comprising a first optical fibre and a second optical fibre having a core region and a cladding region, wherein the core region of the second optical fibre comprises material that has been drawn from the first optical fibre, in which the first fibre is a photonic crystal fibre.
Dependencies are inferred from the claim text.