WO2015039273A1 - Dispositif laser, procédé de modulation de signal optique et système réseau optique - Google Patents

Dispositif laser, procédé de modulation de signal optique et système réseau optique Download PDF

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Publication number
WO2015039273A1
WO2015039273A1 PCT/CN2013/083601 CN2013083601W WO2015039273A1 WO 2015039273 A1 WO2015039273 A1 WO 2015039273A1 CN 2013083601 W CN2013083601 W CN 2013083601W WO 2015039273 A1 WO2015039273 A1 WO 2015039273A1
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WO
WIPO (PCT)
Prior art keywords
laser
area
different wavelengths
light
grating
Prior art date
Application number
PCT/CN2013/083601
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English (en)
Chinese (zh)
Inventor
王磊
周小平
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to PCT/CN2013/083601 priority Critical patent/WO2015039273A1/fr
Priority to CN201380001772.0A priority patent/CN104756332B/zh
Publication of WO2015039273A1 publication Critical patent/WO2015039273A1/fr

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Classifications

    • 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
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/0625—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in multi-section lasers
    • H01S5/06255—Controlling the frequency of the radiation
    • H01S5/06258—Controlling the frequency of the radiation with DFB-structure

Definitions

  • the present invention relates to the field of optical communications, and more particularly to a laser, an optical signal modulation method, and an optical network system.
  • One is a low-turn laser implemented with a hybrid integrated DBR (Distributed Bragg Reflector) structure.
  • the laser uses DBR as a laser cavity mirror for laser mode selection, which uses the deviation of the laser wavelength and the DBR reflection wavelength to suppress enthalpy during modulation.
  • DBR Distributed Bragg Reflector
  • This type of laser requires a narrow DBR reflection spectrum width, it can only be realized by hybrid integration, which is costly and lacks practicality.
  • One is a laser consisting of a gain-coupled DFB (Distributed Feedback Bragg) region and a grating-free feedback region.
  • the gain-coupled DFB region is a anterior region for generating gain and loading modulated signals.
  • the feedback region without grating is the back region, and its refractive index can be adjusted by the phase control current. When the phase of the feedback zone is within a certain range, the frequency variation caused by the DFB area modulation is compressed, thereby reducing the ripple of the output signal.
  • the DBF region in order to ensure the single mode operation of the laser, the DBF region must use the gain with A gain-coupling structure with a periodically varying length, but using a gain-coupled structure results in a decrease in the reliability of the laser.
  • Embodiments of the present invention provide a laser, an optical signal modulation method, and an optical network system, which provide a mechanism for modulating an optical signal, thereby reducing the amount of optical signal modulation in optical signal modulation, and ensuring a single mode of the laser. Operation, increasing the reliability of the laser.
  • a laser comprising: a laser generating region, a regulating region, and a laser reflecting region;
  • a laser generating region configured to generate at least two different wavelengths of light, the at least two different wavelengths of light passing through the adjustment region to the laser reflective region;
  • a laser reflection area configured to reflect one of the at least two different wavelengths of light to generate reflected light, and the reflected light returns to the laser generation area through the adjustment area, and the wavelength of the reflected light
  • the lasing mode of the laser generating region corresponds to the same wavelength.
  • the method includes:
  • the common substrate for protecting the laser, the laser generating region, the adjusting region and the laser reflecting region sharing the common substrate;
  • a common cladding layer is disposed on a top layer of the laser, the common cladding layer is for protecting the laser, and the laser generation region, the adjustment region, and the laser reflection region share the common cladding layer.
  • the laser generating region includes:
  • a waveguide layer a grating is etched on the waveguide layer, and the waveguide layer is disposed on the common substrate;
  • the laser generating region includes: a quantum well layer, the quantum well layer being disposed between the common cladding layer and the common substrate;
  • a grating is etched on the quantum well layer.
  • the quantum well layer is configured to generate a plurality of different wavelengths of light, the grating being used to Filtering a plurality of different wavelengths of light generated by the quantum well layer to obtain the at least two different wavelengths of light;
  • the gratings are gratings that are both even and distributed.
  • the adjustment area includes:
  • the waveguide layer being disposed between the common cladding layer and the common substrate.
  • the laser reflective area includes:
  • the waveguide layer is etched with a grating on the waveguide layer, and the waveguide layer is disposed on the grating in which the grating is uniformly distributed.
  • the laser further includes:
  • an adjustment module configured to adjust a refractive index of the adjustment area when a quantity of emitted light does not satisfy a preset condition.
  • a second aspect provides an optical signal modulation method, the method comprising: generating a region to generate light of at least two different wavelengths, wherein the at least two different wavelengths of light pass through a regulatory region to reach a laser reflective region;
  • the lasing mode corresponds to the same wavelength
  • the emitted light is generated based on the reflected light.
  • the generating at least two Lights of different wavelengths include:
  • a plurality of different wavelengths of light are generated, and a plurality of different wavelengths of light produced by the quantum well layer are screened to obtain the at least two different wavelengths of light.
  • the method further includes:
  • the refractive index of the adjustment zone is adjusted when the amount of emitted light does not satisfy the preset condition.
  • a third aspect provides an optical network system, where the optical network system includes at least: an optical line terminal and a plurality of optical network units, and the optical line terminal and/or the plurality of optical network units include the first aspect The laser described.
  • Embodiments of the present invention provide a laser, an optical signal modulation method, and an optical network system.
  • the light of the at least two different wavelengths of light reflects the reflected light, and the reflected light returns to the laser generating region through the adjustment region, and then the laser generating region generates the emitted light according to the reflected light. Therefore, a mechanism for modulating the optical signal is provided, which reduces the amount of the optical signal in the modulation of the optical signal, ensures the single mode operation of the laser, and increases the reliability of the laser.
  • FIG. 1 is a schematic flow chart of an optical signal modulation method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of an optical signal modulation method according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a laser according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a laser according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a laser according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a laser according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram showing a relationship between a ⁇ compression ratio and a refractive index change of an adjustment area according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an optical network system according to an embodiment of the present invention.
  • An optical signal modulation method is applied to a laser, which includes a laser generating area, an adjustment area, and a laser reflection area. As shown in FIG. 1, the method includes:
  • the laser generating region generates light of at least two different wavelengths, and the at least two different wavelengths of light pass through the adjustment region to reach the laser reflecting region.
  • the laser reflection region reflects one of the at least two different wavelengths of light to generate reflected light, and the reflected light returns to the laser generation region through the adjustment region, and the wavelength of the reflected light is the same as the wavelength corresponding to the lasing mode of the laser generation region. .
  • the laser generating region generates emitted light according to the reflected light.
  • the method further includes:
  • the amount of enthalpy refers to the amount of offset when the center wavelength is shifted during the transmission of the transmitted light.
  • the adjustment zone is devoid of a grating.
  • Embodiments of the present invention provide an optical signal modulation method, in which a laser generating region generates light of at least two different wavelengths, the at least two different wavelengths of light pass through a regulatory region to reach a laser reflecting region, and then the laser reflecting region has the at least two different wavelengths.
  • One of the light reflections produces reflected light that is returned to the laser generating region through the adjustment region, and then the laser generating region generates the emitted light based on the reflected light.
  • a mechanism for modulating the optical signal is provided, which reduces the amount of optical signal modulation in the modulation of the optical signal, ensures the single mode operation of the laser, and increases the reliability of the laser.
  • the laser generating region 11 is for generating light of at least two different wavelengths, and the light of the at least two different wavelengths passes through the adjustment region 12 to reach the laser reflecting region 13.
  • the laser reflection area 13 is configured to reflect one of the at least two different wavelengths of light to generate reflected light, and the reflected light returns to the laser generation area 11 through the adjustment area 12, and the wavelength of the reflected light corresponds to the lasing mode of the laser generation area 11.
  • the wavelength is the same.
  • the laser generating region 11 is also used to generate emitted light based on the reflected light.
  • the adjustment zone is devoid of a grating and may also be referred to as a grating-free zone.
  • a common substrate 14 is disposed on the bottom layer of the laser 1, the common substrate 14 is used to protect the laser 1, and the laser generating region 11, the adjustment region 12, and the laser reflection region 13 share a common substrate 14. ;
  • a common cladding layer 15 is provided on the top layer of the laser 1, and a common cladding layer 15 is used to protect the laser 1, and the laser generating region 11, the adjustment region 12, and the laser reflection region 13 share a common cladding layer 15.
  • the laser generating region 11, the adjusting region 12, and the laser reflecting region 13 may also employ a non-common substrate and cladding, that is, the laser generating region 11, the adjusting region 12, and the laser reflecting region 13. Use separate substrates and claddings.
  • the laser generating region 11 includes: a waveguide layer 111.
  • the waveguide layer 111 is etched with a grating 1111, and the waveguide layer 111 is disposed.
  • the quantum well layer 112, the quantum well layer 112 is disposed between the common cladding layer 15 and the waveguide layer 111.
  • the quantum well layer 112 is configured to generate a plurality of different wavelengths of light
  • the grating 1111 is configured to filter a plurality of different wavelengths of light generated by the quantum well layer 112 to obtain at least two different wavelengths of light
  • the grating 1111 is a uniformly distributed grating.
  • the adjustment area 12 includes:
  • the waveguide layer 121, the waveguide layer 121 is disposed between the common cladding 15 and the common substrate 14.
  • the laser reflection area 13 includes:
  • the waveguide layer 131 is etched with a grating 1311 on the waveguide layer 131, and the waveguide layer 131 is disposed between the common cladding layer 15 and the common substrate 14.
  • the grating 1311 is a uniformly distributed grating.
  • the laser generating region 11 includes: a quantum well layer 113 disposed between the common cladding layer 15 and the common substrate 14;
  • a grating 1131 is etched on the quantum well layer 113.
  • the quantum well layer 113 is configured to generate a plurality of different wavelengths of light
  • the grating 1131 is configured to filter a plurality of different wavelengths of light generated by the quantum well layer 113 to obtain at least two different wavelengths of light
  • the grating 1131 is a uniformly distributed grating.
  • the structure of the adjustment region 12 and the laser reflection region 13 is the same as that of the adjustment region 12 and the laser reflection region 13 in the laser 1 shown in Fig. 5, and will not be described again.
  • the laser 1 further includes:
  • the adjustment module 16 is configured to adjust the refractive index of the adjustment region 12 when the amount of emitted light does not satisfy the preset condition.
  • the adjustment module 16 can be externally connected to the laser 1 or integrated in the laser 1 , the adjustment module 16 can automatically adjust the refractive index of the adjustment area 12 according to the amount of emitted light, or can remind the administrator when the amount of emitted light does not meet the preset condition, so as to adjust the instruction according to the administrator.
  • the refractive index of the adjustment zone 12 is adjusted.
  • the preset condition may be a threshold value or a threshold value of the ⁇ compression ratio, which is the ⁇ quantity of the current emitted light and the emitted light generated when the laser only has the laser generating area. The ratio of the amount, the smaller the compression ratio, the stronger the suppression ability.
  • the adjustment zone is devoid of a grating and may also be referred to as a grating-free zone.
  • the laser 1 provided in the embodiment of the present invention may be DML
  • the laser generating region in the laser 1 may be a DFB region
  • the laser reflecting region may be a DBR region.
  • the specific process of the laser 1 modulating the optical signal may be:
  • the laser generating region simultaneously generates three different wavelengths of light, which are a first beam of wavelength A, a second beam of wavelength B, and a third beam of wavelength C; wherein, the wavelength The first beam of light A, the second beam of wavelength B, and the third beam of wavelength C are not specifically meant, but are merely exemplary.
  • the quantum well layer 112 in the laser generating region 11 simultaneously generates a first beam of wavelength A, a second beam of wavelength B, and a third beam of wavelength C, and then the wavelength is The first beam of A, the second beam of wavelength B, and the third beam of wavelength C simultaneously enter the waveguide layer 111.
  • the first beam of the wavelength A, the second beam of the wavelength B, and the third beam of the wavelength C pass through the grating 1111 of the waveguide layer 111, and the grating 1111 filters the wavelength according to a preset filtering mode.
  • the third beam of light C retains the first beam of wavelength A and the second beam of wavelength B, and then the first beam of light of wavelength A and the second beam of wavelength of B simultaneously enter adjustment zone 12 .
  • the setting of the filtering mode of the grating 1111 of the waveguide layer 111 can be realized by the structural design of the grating, which is not limited herein. Or:
  • the first beam of the wavelength A, the second beam of the wavelength B, and the third beam of the wavelength C pass through the grating 1131 of the quantum well layer 113.
  • the grating 1131 filters the wavelength according to a predetermined filtering method.
  • the third beam of C, retaining the first beam of wavelength A And the second light of wavelength B, and then the first beam of wavelength A and the second beam of wavelength B enter the adjustment zone 12 simultaneously.
  • the method of setting the grating 1131 of the quantum well layer 113 is the same as or different from the method of setting the grating 1111 of the waveguide layer 111.
  • the first beam of the wavelength A and the second beam of the wavelength B are simultaneously passed through the adjustment zone 12 by the waveguide layer 121.
  • the refractive index of the waveguide layer 121 in the adjustment region 12 is adjustable to reduce the amount of emitted light by adjusting the refractive index; the emitted light is the last light output by the laser 1.
  • the laser reflection zone 13 After the first beam of light A and the second beam of wavelength B pass through the adjustment zone 12 simultaneously, the laser reflection zone 13 is reached, and then the first beam of wavelength A and the second beam of wavelength B are The light passes through the grating 1311 of the waveguide layer 131 at the same time.
  • the grating 1311 filters the second beam of the wavelength B according to a preset filtering mode, retains the first beam of the wavelength A, and sets the wavelength to the first of the A.
  • the beam of light is reflected back to the conditioning zone 12.
  • the method of setting the grating 1311 of the waveguide layer 131 is the same as or different from the method of setting the grating 1111 of the waveguide layer 111.
  • the first light of the wavelength A is passed through the adjustment layer 12 to the laser emission region 11 by the waveguide layer 121.
  • the laser emitting region 11 After the first beam of the wavelength A reaches the laser emitting region 11, the laser emitting region 11 generates the emitted light by using the first beam of the wavelength A.
  • the wavelength of the emitted light is the same as the wavelength of the first beam of the wavelength A.
  • the above process is a self-feedback process in which the reduction in the amount of light in the emitted light can be achieved by adjusting the refractive index of the waveguide layer 121 in the adjustment zone 12.
  • the filtering of the third beam of the wavelength C by the grating 1111 of the waveguide layer 111 in the laser emitting region 11 and the filtering of the second beam of the wavelength B by the grating 1311 of the waveguide layer 131 in the laser reflecting region 13 are realized.
  • One of the adjacent wavelengths is the same to ensure the emission intensity of the emitted light, thereby realizing the single of the laser 1 Mode operation.
  • the laser 1 can reduce the amount of enthalpy to one-third of that of a conventional DFB laser.
  • Embodiments of the present invention provide a laser including a laser generating region, an adjusting region, and a laser reflecting region, wherein the laser generating region generates light of at least two different wavelengths, and the at least two different wavelengths of light pass through the adjusting region to reach the laser reflecting region, and then The laser reflection region reflects one of the at least two different wavelengths of light to generate reflected light, and the reflected light returns to the laser generation region through the adjustment region, and then the laser generation region generates the emission light according to the reflected light. Therefore, a mechanism for modulating the optical signal is provided, which reduces the amount of optical signal modulation in the modulation of the optical signal, ensures the single mode operation of the laser, and increases the reliability of the laser.
  • the embodiment of the present invention further provides an optical network system 00.
  • the optical network system 00 includes at least: an Optical Line Terminal (OLT) 01 and a plurality of Optical Network Units (ONUs) 02, and an optical line terminal 01. And/or a plurality of optical network units 02 comprise the laser 1 provided in the previous embodiments.
  • OLT Optical Line Terminal
  • ONUs Optical Network Units
  • And/or a plurality of optical network units 02 comprise the laser 1 provided in the previous embodiments.
  • the optical line terminal 01 and the plurality of optical network units 02 can be connected by the optical splitter 03.
  • the disclosed methods and apparatus may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of modules is only a logical function division.
  • multiple modules or components may be combined or integrated. Go to another system, or some features can be ignored, or not executed.
  • the modules described as separate components may or may not be physically separate.
  • the components displayed as modules may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Can be based on reality It is necessary to select some or all of the units to achieve the purpose of the solution of the embodiment.
  • the functional modules in the various embodiments of the present invention may be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. Medium.

Abstract

La présente invention porte sur le champ technique des communications. Elle concerne un dispositif laser, un procédé de modulation de signal optique et un système réseau optique. L'invention concerne également un mécanisme de modulation de signal optique réduisant la quantité de fluctuation d'un signal optique dans la modulation de signal optique, assurant un fonctionnement en mode unique d'un dispositif laser et accroissant la fiabilité du dispositif laser. Le procédé consiste en particulier en ce que : une zone de génération (11) laser génère au moins deux lumières de longueurs d'ondes différentes, et les au moins deux lumières de longueurs d'ondes différentes traversent une zone d'ajustement (12) pour arriver à une zone réfléchissante (13) laser; la zone réfléchissante (13) laser réfléchit une des au moins deux lumières de longueurs d'ondes différentes pour générer de la lumière réfléchie, et la lumière réfléchie traverse la zone d'ajustement (12) pour retourner à la zone de génération (11) laser; et la zone de génération (11) laser génère la lumière émise en fonction de la lumière réfléchie. La solution technique module un signal optique dans un dispositif laser.
PCT/CN2013/083601 2013-09-17 2013-09-17 Dispositif laser, procédé de modulation de signal optique et système réseau optique WO2015039273A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2013/083601 WO2015039273A1 (fr) 2013-09-17 2013-09-17 Dispositif laser, procédé de modulation de signal optique et système réseau optique
CN201380001772.0A CN104756332B (zh) 2013-09-17 2013-09-17 一种激光器、光信号调制方法和光网络系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/083601 WO2015039273A1 (fr) 2013-09-17 2013-09-17 Dispositif laser, procédé de modulation de signal optique et système réseau optique

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WO2015039273A1 true WO2015039273A1 (fr) 2015-03-26

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Citations (6)

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JPH042190A (ja) * 1990-04-18 1992-01-07 Nec Corp モード同期半導体レーザ
US5177758A (en) * 1989-06-14 1993-01-05 Hitachi, Ltd. Semiconductor laser device with plural active layers and changing optical properties
CN1452284A (zh) * 2003-05-01 2003-10-29 清华大学 分布反馈半导体激光器与电吸收调制器集成光源及制法
US20050053102A1 (en) * 2001-08-03 2005-03-10 Reid Douglas Charles John Tuneable laser
CN1913261A (zh) * 2005-08-11 2007-02-14 优迪那半导体有限公司 半导体激光器及其控制方法、光学器件以及激光器装置
CN102742099A (zh) * 2011-12-20 2012-10-17 华为技术有限公司 激光器、无源光网络系统、装置以及波长控制方法

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KR100519922B1 (ko) * 2002-12-17 2005-10-10 한국전자통신연구원 다영역 자기모드 잠김 반도체 레이저 다이오드
JP4374862B2 (ja) * 2003-02-06 2009-12-02 三菱電機株式会社 半導体レーザ、半導体レーザの駆動方法および波長変換素子
JP5287460B2 (ja) * 2009-04-17 2013-09-11 富士通株式会社 半導体レーザ
JP5407526B2 (ja) * 2009-04-27 2014-02-05 住友電気工業株式会社 波長可変レーザ、波長可変レーザ装置、及び波長可変レーザ制御方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5177758A (en) * 1989-06-14 1993-01-05 Hitachi, Ltd. Semiconductor laser device with plural active layers and changing optical properties
JPH042190A (ja) * 1990-04-18 1992-01-07 Nec Corp モード同期半導体レーザ
US20050053102A1 (en) * 2001-08-03 2005-03-10 Reid Douglas Charles John Tuneable laser
CN1452284A (zh) * 2003-05-01 2003-10-29 清华大学 分布反馈半导体激光器与电吸收调制器集成光源及制法
CN1913261A (zh) * 2005-08-11 2007-02-14 优迪那半导体有限公司 半导体激光器及其控制方法、光学器件以及激光器装置
CN102742099A (zh) * 2011-12-20 2012-10-17 华为技术有限公司 激光器、无源光网络系统、装置以及波长控制方法

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