# US 9,753,227 B2 · Optical device

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- Number: US 9,753,227 B2
- Document ID: US9753227B2
- Status: Granted
- Kind: B2
- Application number: 15/083,949
- Filed: 2016-03-29
- Published: 2016-07-21
- Granted: 2017-09-05
- Earliest claimed: 2013-06-28
- Assignees: International Business Machines Corporation
- Applicants: International Business Machines Corporation
- Inventors: Yoichi Taira
- Web page: https://patentgrep.com/patent/US9753227B2

## CPC

- G02B 6/30: for use between fibre and thin-film device
- G02B 6/12004: {Combinations of two or more optical elements}
- G02B 6/124: Geodesic lenses or integrated gratings
- G02B 6/25: Preparing the ends of light guides for coupling, e.g. cutting
- G02B 6/262: {Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements}
- G02B 6/32: having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)}
- G02B 6/34: utilising prism or grating {(G02B6/293 takes precedence)}
- Y10T 29/49: Method of mechanical manufacture
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An optical device and a method of manufacturing an optical device. The optical device includes: a conversion means for converting propagation light propagating through an optical waveguide into parallel light and for outputting the parallel light; and a first lens means for focusing the parallel light outputted from the conversion means on a core of an optical fiber. The method includes: converting propagation light propagating through an optical waveguide into parallel light; outputting the parallel light; and focusing, using a first lens, the parallel light on a core of an optical fiber.

## Claims

### Claim 1

An optical device comprising:
a conversion means comprising a first lens means, overlying a reflective means, for converting propagation light propagating through an optical waveguide into parallel light and for focusing and outputting the parallel light; and
a second lens means opposite a convex lens surface of the first lens means for receiving the parallel light from the first lens means, the second lens means being configured to focus the parallel light received on a core of an optical fiber, and including a recess for accommodating the optical fiber.

### Claim 2 (depends on 1)

The optical device according to claim 1, wherein the conversion means includes a grating means to bend the propagation light at a right angle to convert the propagation light to parallel light.

### Claim 3 (depends on 2)

The optical device according to claim 2, wherein the grating means is a reflective surface provided with a plurality of V-shaped grooves arranged in parallel, in which the surface on one side of each V-shaped groove forms a 45-degree incline.

### Claim 4 (depends on 1)

The optical device according to claim 1, wherein the conversion means comprises:
a reflecting means forming a 45-degree tilted surface for reflecting the propagation light; and
a second lens means, having a focal point at a point on which the propagation light is reflected by the reflecting means, that converts the propagation light reflected by the reflecting means into parallel light.

### Claim 5 (depends on 1)

The optical device according to claim 1, wherein the parallel light strikes a convex lens surface of the first lens means, and wherein opposite the convex lens surface of the first lens means a recess is formed for accommodating the optical fiber so the parallel light is focused on the core of the optical fiber.

### Claim 6 (depends on 1)

The optical device according to claim 1, wherein the optical waveguide is a silicon thin-film waveguide.