# US 5,345,545 A · Optical fiber device

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- Number: US 5,345,545 A
- Document ID: US5345545A
- Status: Granted
- Kind: A
- Application number: 08/115,687
- Filed: 1993-09-03
- Granted: 1994-09-06
- Earliest claimed: 1993-09-03
- Assignees: Sumitomo Electric Industries, Ltd.
- Inventors: Takafumi Uemiya; Naota Uenishi
- Web page: https://patentgrep.com/patent/US5345545A

## CPC

- G02B 6/12002: {Three-dimensional structures}
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- G02B 6/1221: {made from organic materials}
- G02B 6/13: Integrated optical circuits characterised by the manufacturing method
- G02F 1/383: of the optical fibre type
- G02B 6/241: {Light guide terminations}
- G02B 2006/12038: {Glass (SiO2 based materials)}
- G02F 2201/07: buffer layer
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

An optical fiber device comprising an optical fiber comprising a core made of an organic crystal and a cladding made of glass, the device generating second harmonics of a laser light that has been launched into the core, the device further comprising a buffer layer on at least one end faces of the optical fiber, and a water barrier layer on the surface of the buffer layer, the buffer layer being such that the organic crystal of the core is not dissolved therein.

## Claims

### Claim 1

An optical fiber device comprising an optical fiber comprising a core made of an organic crystal and a cladding made of glass, said device generating second harmonics of a laser light that has been launched into said core, said device further comprising a buffer layer on at least one end faces of said optical fiber, and a water barrier layer on the surface of said buffer layer, said buffer layer being such that said organic crystal of said core is not dissolved therein.

### Claim 2 (depends on 1)

An optical fiber device as claimed in claim 1, wherein said buffer layer and said water barrier layer form a de-reflection film.

### Claim 3 (depends on 1)

An optical fiber device as claimed in claim 1, wherein said optical fiber device further comprises a protective film on the surface of said water barrier layer.

### Claim 4 (depends on 3)

An optical fiber device as claimed in claim 3, wherein said optical fiber device further comprises a de-reflection film on the surface of said protective layer.

### Claim 5 (depends on 3)

An optical fiber device as claimed in claim 3, wherein said protective layer functions as a lens for collimating said second harmonics.

### Claim 6 (depends on 3)

An optical fiber device as claimed in claim 3, wherein said protective layer covers not only the end face of the fiber but also part of its lateral side.

### Claim 7 (depends on 1)

An optical fiber device as claimed in claim 1, wherein said buffer layer comprises a monomolecular layer of a silane coupling agent and a silicone composition film formed on said monomolecular layer.