# US 2019/0170579 A1 · Micro-scale waveguide spectroscope

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- Number: US 2019/0170579 A1
- Document ID: US20190170579A1
- Status: Published application
- Kind: A1
- Application number: 16/043,895
- Filed: 2018-07-24
- Published: 2019-06-06
- Earliest claimed: 2017-12-01
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Jaesoong LEE
- Web page: https://patentgrep.com/patent/US20190170579A1

## CPC

- G01J 3/2803: {using photoelectric array detector}
- G01J 3/0218: {using optical fibers}
- G01J 3/0256: {Compact construction}
- G01J 3/0291: {Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements}
- G01J 3/26: using multiple reflection, e.g. Fabry-Perot interferometer, variable interference filters
- G02B 6/02304: {Core having lower refractive index than cladding, e.g. air filled, hollow core}
- G02B 6/12007: {forming wavelength selective elements, e.g. multiplexer, demultiplexer}
- G02B 6/4289: {by inducing bending, microbending or macrobending, to the light guide}
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A Micro-scale waveguide spectroscope is provided. The waveguide spectroscope includes a waveguide having a bent region that does not satisfy a total reflection condition, and a light detector arranged on the bent region of the waveguide and configured to detect light emitted from the bent region. The waveguide includes a single layer having a refractive index greater than that of air or includes a core layer and a cladding layer surrounding the core layer. The waveguide has at least a first region having a first radius of curvature and a second region having a second radius of curvature different from the first radius of curvature.

## Claims

### Claim 1

A micro-scale waveguide spectroscope comprising:
a waveguide comprising a bent region that does not satisfy a total internal reflection condition; and
a light detector configured to detect light emitted from the bent region.

### Claim 2 (depends on 1)

The micro-scale waveguide spectroscope of claim 1, wherein the waveguide comprises a single layer having a refractive index greater than a refractive index of air.

### Claim 3 (depends on 1)

The micro-scale waveguide spectroscope of claim 1, wherein the waveguide comprises:
a core layer; and
a cladding layer surrounding the core layer.

### Claim 4 (depends on 1)

The micro-scale waveguide spectroscope of claim 1, wherein the waveguide has a spiral structure in which a radius of curvature of the waveguide gradually decreases from a first end of the waveguide to a second end of the waveguide.

### Claim 5 (depends on 1)

The micro-scale waveguide spectroscope of claim 1, wherein the waveguide comprises a plurality of bent regions, wherein a radius of curvature of the plurality of bent regions gradually decreases from a first end of the waveguide to a second end of the waveguide.

### Claim 6 (depends on 3)

The micro-scale waveguide spectroscope of claim 3, wherein the core layer is an air layer, and the cladding layer is a multi-reflection layer which inwardly reflects light incident thereon from the core layer.

### Claim 7 (depends on 3)

The micro-scale waveguide spectroscope of claim 3, wherein
the core layer is a first material layer having a refractive index greater than a refractive index of air, and
the cladding layer is a second material layer having a refractive index less than the refractive index of the first material layer.

### Claim 8 (depends on 1)

The micro-scale waveguide spectroscope of claim 1, wherein the light detector comprises an optical device configured to perform photoelectric conversion.

### Claim 9 (depends on 1)

The micro-scale waveguide spectroscope of claim 1, wherein the waveguide comprises a plurality of bent regions, and a radius of curvature of each of the plurality of bent regions is different from a radius of curvature of each other of the plurality of bent regions.

### Claim 10

A micro-scale waveguide spectroscope comprising:
a waveguide comprising a first curved region having a first radius of curvature and a second curved region having a second radius of curvature, different from the first radius of curvature; wherein the first curved region and the second curved region do not satisfy a total internal reflection condition of the waveguide; and
a first light detector disposed such that light emitted from the waveguide through the first curved region is incident thereon, and a second light detector disposed such that light emitted from the waveguide through the second curved region is incident thereon.