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US 6,485,191 B1Granted
Fiber stub type device and an optical module using the same, and a method for producing a fiber stub type device
AssigneeKYOCERA Corporation
InventorYasushi Sato
Life of this patent
Estimating the term…
Abstract
A fiber stub type optical device is provided with a ferrule formed with a through hole extending in a longitudinal direction thereof and a groove for dividing the through hole in an intermediate position with respect to the longitudinal direction, a first optical fiber accommodated in the through hole, a second optical fiber aligned with the first optical fiber in the through hole while being divided by the groove and having a larger mode field diameter than the first optical fiber, and an optoisolator provided in the groove and optically connected with the second optical fiber divided by the groove.
Claims20
A fiber stub type optical device, comprising:
- a ferrule formed with a through hole extending in a longitudinal direction thereof and a groove for dividing the through hole in an intermediate position with respect to the longitudinal direction;
- a first optical fiber accommodated in the through hole;
- a second optical fiber aligned with the first optical fiber in the through hole while being divided by the groove and having a larger mode field diameter than the first optical fiber;
- and
- an optoisolator provided in the groove and optically connected with the second optical fiber divided by the groove.
2 more elements
A fiber stub type optical device, comprising:
- a ferrule formed with a through hole extending in a longitudinal direction thereof and a groove for dividing the through hole in an intermediate position with respect to the longitudinal direction;
- a first optical fiber accommodated in the through hole;
- a second optical fiber aligned with the first optical fiber in the through hole while being divided by the groove and having a larger mode field diameter than the first optical fiber;
- and,
- an optoisolator provided in the groove and optically connected with the second optical fiber divided by the groove,
- wherein ends of sections of the second optical fiber divided by the groove projects into the groove, and side surfaces of the projecting ends are covered by protection members having a higher refractive index than a cladding of the second optical fiber.
3 more elements
A fiber stub type optical device comprising:
- a ferrule formed with a through hole extending in a longitudinal direction thereof and a groove for dividing the through hole in an intermediate position with respect to the longitudinal direction;
- a first optical fiber accommodated in the through hole;
- a second optical fiber aligned with the first optical fiber in the through hole while being divided by the groove and having a larger mode field diameter than the first optical fiber;
- and,
- an optoisolator provided in the groove and optically connected with the second optical fiber divided by the groove,
- wherein a polarization plane rotating portion of the optoisolator includes a Faraday rotator having a property of spontaneous magnetization, and at least an outer surface portion of the groove of the ferrule is formed of a diamagnetic.
3 more elements
An optical module, comprising:
- a substrate;
- and
- a fiber stub type optical device provided on the substrate, the optical device including
- a ferrule formed with a through hole extending in a longitudinal direction thereof and a groove for dividing the through hole in an intermediate position with respect to the longitudinal direction;
- a first optical fiber accommodated in the through hole;
- a second optical fiber aligned with the first optical fiber in the through hole while being divided by the groove and having a larger mode field diameter than the first optical fiber;
- and
- an optoisolator provided in the groove and optically connected with sections of the second optical fiber divided by the groove.
5 more elements
An optical module, comprising:
- a substrate;
- and
- a fiber stub type optical device provided on the substrate, the optical device including:
- a ferrule formed with a through hold extending in a longitudinal direction thereof and a groove for dividing the through hole in an intermediate position with respect to the longitudinal direction:
- a first optical fiber accommodated in the through hole;
- a second optical fiber aligned with the first optical fiber in the through hole while being divided by the groove and having a larger mode field diameter than the first optical fiber;
- and,
- an optoisolator provided in the groove and optically connected with the second optical fiber divided by the groove,
- wherein ends of sections of the second optical fiber divided by the groove projects into the groove, and side surfaces of the projecting ends are covered by protection members having a higher refractive index than a cladding of the second optical fiber.
6 more elements
A method for manufacturing a fiber stub type optical device, comprising the steps of:
- preparing a ferrule formed with a through hole extending in a longitudinal direction thereof;
- aligning a first optical fiber and a second optical fiber having a larger mode field diameter than the first optical fiber in the through hole;
- forming a groove in an intermediate position of the ferrule so as to divide the second optical fiber accommodate in the through hole and cross the through hole;
- and
- providing an optoisolator in the groove so as to be optically connected with sections of the second optical fiber divided by the groove.
2 more elements
A method for manufacturing a fiber stub type optical device, comprising the steps of:
- preparing a ferrule formed with a through hole extending in a longitudinal direction thereof;
- forming a groove in an intermediate position of the ferrule;
- aligning a first optical fiber and a second optical fiber having a larger mode field diameter than the first optical fiber in the through hole such that the second optical fiber extends over the groove;
- dividing the second optical fiber accommodated to extend over the groove;
- and
- providing an optoisolator between sections of the second optical fiber divided by the groove.
3 more elements
Dependencies are inferred from the claim text.