JP7379962B2 - 光導波路終端素子およびそれを用いた光フィルタ - Google Patents
光導波路終端素子およびそれを用いた光フィルタ Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/1228—Tapered waveguides, e.g. integrated spot-size transformers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/125—Bends, branchings or intersections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/1028—Coupling to elements in the cavity, e.g. coupling to waveguides adjacent the active region, e.g. forward coupled [DFC] structures
- H01S5/1032—Coupling to elements comprising an optical axis that is not aligned with the optical axis of the active region
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/14—External cavity lasers
- H01S5/141—External cavity lasers using a wavelength selective device, e.g. a grating or etalon
- H01S5/142—External cavity lasers using a wavelength selective device, e.g. a grating or etalon which comprises an additional resonator
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12104—Mirror; Reflectors or the like
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12109—Filter
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12121—Laser
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/241—Light guide terminations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/028—Coatings ; Treatment of the laser facets, e.g. etching, passivation layers or reflecting layers
- H01S5/0287—Facet reflectivity
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/1003—Waveguide having a modified shape along the axis, e.g. branched, curved, tapered, voids
- H01S5/101—Curved waveguide
Description
第1実施形態ついて、図1~図9を参照して説明する。本実施形態では、光導波路終端素子としてターミネータが備えられる光フィルタを用いたレーザ光源について説明する。
本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。
10 半導体基板
12 第1導波路
13 第1リング共振器
14 第2導波路
15 第2リング共振器
16 第3導波路
12a、14a、14b、16a ターミネータ
12aa テーパ部
12ab 曲げ構造部
Claims (8)
- 半導体基板(10)上に形成されると共にクラッド層(32、34)によって囲まれた光導波路(12、14、16)の先端に備えられる光導波路終端素子であって、
前記光導波路の先端に行くほど光の閉じ込め状態を強い状態からそれよりも弱い状態に変換する変換部(12aa)と、
前記半導体基板の表面と平行な平面上において前記変換部の先端に繋げられ円弧状に折り曲げられた曲げ構造部(12ab)と、を有し、
前記変換部と前記曲げ構造部との間には、前記曲げ構造部よりも曲率が小さくされていて前記変換部から伝わる光の向きを変える延長部(12ac)が備えられ、
前記曲げ構造部は、前記延長部を介して前記変換部の先端に繋げられている、光導波路終端素子。 - 前記変換部は、前記光導波路の先端おいて、第1幅(W1)から該第1幅よりも小さな第2幅(W2)に先細りとされたテーパ部(12aa)である、請求項1に記載の光導波路終端素子。
- 前記第2幅が0.45μm以下である、請求項2に記載の光導波路終端素子。
- 前記変換部は、前記クラッド層と前記光導波路とによる実効屈折率が前記光導波路の先端に行くほど小さくなって前記クラッド層の屈折率に近づく、請求項1ないし3のいずれか1つに記載の光導波路終端素子。
- 前記光導波路がシリコン窒化膜によって構成されていると共に、前記クラッド層がシリコン酸化膜によって構成されており、
前記光の閉じ込め状態が弱い状態は、前記クラッド層と前記光導波路とによる実効屈折率が1.49以下となっている、請求項1ないし4のいずれか1つに記載の光導波路終端素子。 - 前記変換部は、前記半導体基板の端面に対して傾斜させられている、請求項1ないし5のいずれか1つに記載の光導波路終端素子。
- 前記曲げ構造部は幅が一定とされている、請求項1ないし6のいずれか1つに記載の光導波路終端素子。
- 異なる周囲長を有する第1リング共振器(13)および第2リング共振器(15)と、
前記第1リング共振器に光結合され、該第1リング共振器に対して光を伝搬する前記光導波路(12)と、を含み、
前記光導波路に入射された光が前記第1リング共振器を通じて前記第2リング共振器に伝搬される光フィルタであって、
請求項1ないし7のいずれか1つに記載の光導波路終端素子が前記光導波路の先端部に、ターミネータとして備えられている、光フィルタ。
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US17/009,943 US11307353B2 (en) | 2019-09-04 | 2020-09-02 | End device of optical waveguide and optical filter |
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US20220196913A1 (en) * | 2020-12-21 | 2022-06-23 | Unm Rainforest Innovations | Ring-Geometry Photodetector Designs For High-Sensitivity And High-Speed Detection Of Optical Signals For Fiber Optic And Integrated Optoelectronic Devices |
WO2023238294A1 (ja) * | 2022-06-08 | 2023-12-14 | 三菱電機株式会社 | 光終端器、光波長フィルタ及び外部共振器型レーザ光源 |
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JP2012048036A (ja) | 2010-08-27 | 2012-03-08 | Fujikura Ltd | 光導波路素子 |
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US20170322377A1 (en) | 2016-05-09 | 2017-11-09 | Patrick Dumais | Optical Waveguide Termination Having A Doped, Light-Absorbing Slab |
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TWI251393B (en) * | 2004-03-31 | 2006-03-11 | Nec Corp | Tunable laser |
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JP2012048036A (ja) | 2010-08-27 | 2012-03-08 | Fujikura Ltd | 光導波路素子 |
JP2012181433A (ja) | 2011-03-02 | 2012-09-20 | Sumitomo Electric Ind Ltd | スポットサイズ変換器 |
WO2016031096A1 (ja) | 2014-08-27 | 2016-03-03 | 日本電気株式会社 | 光素子、終端器、波長可変レーザ装置及び光素子の製造方法 |
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US20170322377A1 (en) | 2016-05-09 | 2017-11-09 | Patrick Dumais | Optical Waveguide Termination Having A Doped, Light-Absorbing Slab |
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