Wedged and lensed optical fiber
AssigneeSeikoh Giken Co., Ltd.
InventorsMitsuo Takahashi, Naotoshi Shiokawa, Masami Suzuki
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Abstract
There is provided an optical fiber to be coupled to a laser diode light source. The optical fiber has a wedge-shaped lens for decreasing the influence of reflection light BR1 and returning reflection light BR2, whereby the laser diode light source can be operated with stability. The wedged and lensed optical fiber according to the present invention is arranged such that the optical fiber is formed to have a wedge-shaped lens at the tip end thereof, a ridge as a rooftop is made to include the center tip end of a core, the ridge is inclined by an inclination angle β with respect to a plane perpendicular to the optical axis of the optical fiber, and the ridge is formed into a semi-cylindrical surface or a conical surface.
Claims6
An optical fiber comprising a wedge-shaped lens having a tip end thereof supported in a ferrule with a conical shape at the tip end thereof, and formed into a rooftop shape together with the tip end of the ferrule, wherein
- a ridge of the optical fiber is formed so as to include the center of a core at the tip end and to be inclined to have an inclination angle (β) with respect to a plane perpendicular to an optical axis of the optical fiber,
- the ridge is formed into one of a semi-cylindrical surface and a conical surface together with the conical surface of the ferrule and extends in a direction,
- the tip end is symmetrical with respect to only a single plane, and
- the tip end is adapted to be supported in a ferrule provided with an index indicating the direction in which the ridge extends,
- wherein the optical fiber is generally cylindrical with an outer circumference, and the ridge has a shoulder cut to form a plane perpendicular to the optical axis of the optical fiber.
An assembly comprising:
- an optical fiber comprising a wedge-shaped lens having an optical fiber tip end and a core;
- and
- a ferrule for supporting the optical fiber, the ferrule having a ferrule tip end having a conical shape and formed into a rooftop shape with the optical fiber tip end,
- wherein the optical fiber has a ridge formed so as to include the center of the core at the optical fiber tip end and to be inclined to have an inclination angle (β) with respect to a plane perpendicular to an optical axis of the optical fiber,
- the ridge is formed into one of a semi-cylindrical surface and a conical surface together with the conical surface of the ferrule and extends in a direction,
- the optical fiber tip end is symmetrical with respect to only a single plane, and
- the ferrule is provided with an index indicating the direction in which the ridge extends,
- wherein the optical fiber is generally cylindrical with an outer circumference, and the ridge has a shoulder cut to form a plane perpendicular to the optical axis of the optical fiber.
Dependencies are inferred from the claim text.