JP2017156559A - 光送信モジュール - Google Patents
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- JP2017156559A JP2017156559A JP2016039862A JP2016039862A JP2017156559A JP 2017156559 A JP2017156559 A JP 2017156559A JP 2016039862 A JP2016039862 A JP 2016039862A JP 2016039862 A JP2016039862 A JP 2016039862A JP 2017156559 A JP2017156559 A JP 2017156559A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 292
- 239000004065 semiconductor Substances 0.000 claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims description 112
- 238000010586 diagram Methods 0.000 description 15
- 239000000758 substrate Substances 0.000 description 11
- 230000001902 propagating effect Effects 0.000 description 8
- 238000013459 approach Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/505—Laser transmitters using external modulation
- H04B10/5053—Laser transmitters using external modulation using a parallel, i.e. shunt, combination of modulators
-
- 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
-
- 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
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29344—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by modal interference or beating, i.e. of transverse modes, e.g. zero-gap directional coupler, MMI
-
- 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
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
-
- G—PHYSICS
- G02—OPTICS
- 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
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/011—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour in optical waveguides, not otherwise provided for in this subclass
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/524—Pulse modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/54—Intensity modulation
- H04B10/541—Digital intensity or amplitude modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/04—Mode multiplex systems
-
- 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
- G02B2006/12133—Functions
- G02B2006/12142—Modulator
-
- 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
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2808—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using a mixing element which evenly distributes an input signal over a number of outputs
- G02B6/2813—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using a mixing element which evenly distributes an input signal over a number of outputs based on multimode interference effect, i.e. self-imaging
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- Engineering & Computer Science (AREA)
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Nonlinear Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Integrated Circuits (AREA)
- Semiconductor Lasers (AREA)
- Optical Communication System (AREA)
Abstract
【解決手段】光送信モジュールは、レーザ光を出射する半導体レーザと、前記レーザ光を分波して複数の分波光を出力する分波器と、2段階の入力レベルに応じて、前記複数の分波光の光強度を、第1の光強度又は前記第1の光強度よりも大きい第2の光強度にそれぞれ変調する複数の光変調器と、前記複数の光変調器の出力光を合波する合波器と、を有する。また、光送信モジュールは、前記複数の光変調器と前記合波器を接続する複数の光導波路を有し、前記複数の光導波路は、入力端から出力端で第1の位相差を生じる第1光導波路と、入力端から出力端で、前記第1の位相差と異なる第2の位相差を生じる第2光導波路と、を含んでよい。
【選択図】図1
Description
以下に、図面に基づき、本発明の実施形態を具体的かつ詳細に説明する。なお、実施形態を説明するための全図において、同一の機能を有する部材には同一の符号を付し、その繰り返しの説明は省略する。なお、以下に示す図は、あくまで、実施形態の実施例を説明するものであって、図の大きさと本実施例記載の縮尺は必ずしも一致するものではない。
図9は、本発明の第2の実施形態に係る光送信モジュール200の構成図である。本実施形態に係る光送信モジュール200は、第1の実施形態に係る光送信モジュール100と同様に、3つの制御信号により4段階の光強度の光を出力する。本実施形態に係る光送信モジュール200は、1:5分波器21と、5:1合波器22と、5つの光変調器を含む点で、第1の実施形態に係る光送信モジュール100と相違する。
図10は、本発明の第3の実施形態に係る光送信モジュール300の構成図である。本実施形態に係る光送信モジュール300は、第1の実施形態に係る光送信モジュール100と異なり、7つの制御信号により8段階の光強度の光を出力する。本実施形態に係る光送信モジュール300は、1:10分波器41と、10:1合波器42と、10個の光変調器を含む点で、第1の実施形態に係る光送信モジュール100と相違する。
Claims (8)
- レーザ光を出射する半導体レーザと、
前記レーザ光を分波して複数の分波光を出力する分波器と、
2段階の入力レベルに応じて、前記複数の分波光の光強度を、第1の光強度又は前記第1の光強度よりも大きい第2の光強度にそれぞれ変調する複数の光変調器と、
前記複数の光変調器の出力光を合波する合波器と、
を有する光送信モジュール。 - 請求項1に記載の光送信モジュールであって、
前記複数の光変調器と前記合波器を接続する複数の光導波路を有し、
前記複数の光導波路は、
入力端から出力端で第1の位相差を生じる第1光導波路と、
入力端から出力端で、前記第1の位相差と異なる第2の位相差を生じる第2光導波路と、を含む、
光送信モジュール。 - 請求項1に記載の光送信モジュールであって、
前記分波器は、多モード干渉素子である、
光送信モジュール。 - 請求項1に記載の光送信モジュールであって、
前記合波器は、多モード干渉素子である、
光送信モジュール。 - 請求項3に記載の光送信モジュールであって、
前記分波器は、前記レーザ光を分波してN本(Nは3以上の整数)の分波光を出力する第1多モード干渉素子と、前記N本の分波光のうちM本(Mは2以上の整数かつM<N)を1本に合波する第2多モード干渉素子と、から構成される、
光送信モジュール。 - 請求項5に記載の光送信モジュールであって、
前記合波器は、N−M+1本の出力光を1本に合波する第3多モード干渉素子により構成される、
光送信モジュール。 - 請求項3に記載の光送信モジュールであって、
前記分波器は、前記レーザ光を分波してK本(Kは3以上の整数)の分波光を出力する第4多モード干渉素子から構成される、
光送信モジュール。 - 請求項7に記載の光送信モジュールであって、
前記合波器は、K本の出力光を1本に合波する第5多モード干渉素子により構成される、
光送信モジュール。
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JP2016039862A JP6755676B2 (ja) | 2016-03-02 | 2016-03-02 | 光送信モジュール |
US15/443,016 US10187157B2 (en) | 2016-03-02 | 2017-02-27 | Optical transmitter module |
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JP2016039862A JP6755676B2 (ja) | 2016-03-02 | 2016-03-02 | 光送信モジュール |
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JP2017156559A5 JP2017156559A5 (ja) | 2019-01-17 |
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Cited By (2)
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JPWO2022024344A1 (ja) * | 2020-07-31 | 2022-02-03 | ||
WO2022201329A1 (ja) * | 2021-03-23 | 2022-09-29 | 日本電信電話株式会社 | 半導体光集積素子 |
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JP6755676B2 (ja) * | 2016-03-02 | 2020-09-16 | 日本ルメンタム株式会社 | 光送信モジュール |
US10998980B2 (en) * | 2018-03-27 | 2021-05-04 | Florida Institute of Technology, Inc. | System for achieving multiple bits per symbol in optical communications systems by combining spatial domain multiplexing and pulse amplitude modulation |
US11838055B2 (en) * | 2021-01-22 | 2023-12-05 | Nokia Solutions And Networks Oy | Apparatus comprising serially connected electro-absorption modulators |
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JPWO2022024344A1 (ja) * | 2020-07-31 | 2022-02-03 | ||
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