WO2022153349A1 - 光源装置、光装置、制御光生成方法、および監視光生成方法 - Google Patents
光源装置、光装置、制御光生成方法、および監視光生成方法 Download PDFInfo
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- WO2022153349A1 WO2022153349A1 PCT/JP2021/000613 JP2021000613W WO2022153349A1 WO 2022153349 A1 WO2022153349 A1 WO 2022153349A1 JP 2021000613 W JP2021000613 W JP 2021000613W WO 2022153349 A1 WO2022153349 A1 WO 2022153349A1
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- 230000003287 optical effect Effects 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title claims description 50
- 238000012544 monitoring process Methods 0.000 title claims description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 58
- 230000002269 spontaneous effect Effects 0.000 claims abstract description 12
- 230000005855 radiation Effects 0.000 claims description 25
- 230000005469 synchrotron radiation Effects 0.000 claims description 16
- 230000005284 excitation Effects 0.000 claims description 9
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 9
- 239000000835 fiber Substances 0.000 abstract description 18
- 238000007493 shaping process Methods 0.000 abstract description 5
- 239000013307 optical fiber Substances 0.000 description 35
- 238000010586 diagram Methods 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000000644 propagated effect Effects 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
-
- 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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
- G02F1/31—Digital deflection, i.e. optical switching
-
- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
-
- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/073—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an out-of-service signal
-
- 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
- H01S2301/00—Functional characteristics
- H01S2301/02—ASE (amplified spontaneous emission), noise; Reduction thereof
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06795—Fibre lasers with superfluorescent emission, e.g. amplified spontaneous emission sources for fibre laser gyrometers
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1608—Solid materials characterised by an active (lasing) ion rare earth erbium
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0007—Construction
- H04Q2011/0016—Construction using wavelength multiplexing or demultiplexing
Definitions
- the present invention relates to a light source device, an optical device, a controlled light generation method, and a monitoring light generation method, and more particularly to a light source device, an optical device, a controlled light generation method, and a monitoring light generation method used in an optical submarine cable system.
- the optical submarine cable system that connects continents with optical fibers plays an important role as an infrastructure that supports international communication networks.
- the optical submarine cable system is composed of a submarine cable accommodating an optical fiber, a submarine repeater equipped with an optical amplifier, a submarine branching device for branching an optical signal, and an end station device installed in a landing station.
- a submarine transmission line monitoring device (RFTE: Remote Fiber Test Equipment) is used to monitor that there is no abnormality in the unused optical fiber (dark fiber).
- RFTE Remote Fiber Test Equipment
- the OTDR Optical Time Domain Reflectometer
- an optical pulse is transmitted from one end of the optical fiber in the direction opposite to the direction in which the optical pulse is transmitted. Measure the intensity change of the backscattered light returning in the optical fiber.
- Patent Document 1 describes an example of a technique for avoiding the occurrence of such a light surge.
- the related optical network system described in Patent Document 1 has a plurality of optical signal distributors, a plurality of optical lines connecting the plurality of optical signal distributors, and a network management server.
- Each optical signal distributor includes an optical cross-connect device.
- Optical cross-connect devices include a WDM multiplexing device that multiplexes signal lights of different wavelengths to generate WDM signal light, a WDM separation device that separates WDM signal light into signal lights of individual wavelengths, a line measuring device, and a dummy.
- the light source is connected.
- the network management server controls the optical cross-connect device of the optical signal distribution device to output the output dummy light of the dummy light source to the optical amplification line that does not transmit the signal light.
- the output destination of the dummy light is switched by controlling the optical cross-connect device. Therefore, it is not possible to keep a plurality of optical fiber transmission lines in a state where optical pulses can be introduced at the same time. Further, when there are many optical fiber transmission lines to be monitored, it takes a long time to monitor all the optical fiber transmission lines.
- An object of the present invention is a light source device, an optical device, a control light generation method, and a monitoring light generation method that solve a problem that it is difficult to constantly monitor a large number of unused optical fiber transmission lines in an optical submarine cable system. Is to provide.
- the light source device of the present invention uses a light generating means for generating natural radiation amplified light, an optical control means for controlling the band and power of the natural radiation amplified light to generate waveform-shaped natural radiation, and a waveform-shaped natural radiation. It has an optical branching means that branches into a plurality of branched lights.
- the controlled light generation method of the present invention generates natural emission amplified light, controls the band and power of the natural emission amplified light to generate waveform-shaped natural emission light, and branches the waveform-shaped natural emission light into a plurality of branched lights. do.
- a large number of unused optical fiber transmission lines can be constantly monitored in the optical submarine cable system.
- FIG. 1 is a block diagram showing a configuration of a light source device 100 according to a first embodiment of the present invention.
- the light source device 100 includes a light generation unit (light generation means) 110, an optical control unit (light control means) 120, and an optical branching unit (optical branching means) 130.
- the light source device 100 is preferably used for an optical submarine cable system.
- the light generation unit 110 generates natural emission amplified light.
- the optical control unit 120 controls the band and power of the natural emission amplified light to generate waveform-shaped natural emission light.
- the optical branching unit 130 branches the waveform-shaped natural synchrotron radiation into a plurality of branched lights.
- the optical branching unit 130 is configured to branch the waveform-shaped natural synchrotron radiation generated by the light generating unit 110 and the optical control unit 120 into a plurality of branched lights. Therefore, it is possible to simultaneously supply a plurality of branched lights as dummy lights to a large number of unused optical fiber transmission lines. As a result, since it is possible to introduce optical pulses into a plurality of optical fiber transmission lines at the same time, it is possible to monitor unused optical fibers (dark fibers) without causing an optical surge. .. That is, according to the light source device 100 of the present embodiment, a large number of unused optical fiber transmission lines can be constantly monitored in the optical submarine cable system.
- the light generation unit 110 can be configured to include an optical waveguide containing a rare earth element in the core and an excitation laser that generates excitation light for exciting the rare earth element.
- an ASE (Amplified Spontaneous Emission) light source in which an amplifier (Erbium Doped Fiber Amplifier: EDFA) using an erbium-added fiber for an optical waveguide is in a state of no input signal can be used.
- the spontaneous emission amplification light (Amplified Spontaneous Emission: ASE) generated by the light generation unit 110 is naturally broad-amplified natural emission light having a continuously broad optical spectrum.
- the optical control unit 120 can be configured to include a wavelength selection switch (Wavelength Selective Switch: WSS).
- WSS wavelength selection switch
- the wavelength selection switch (WSS) can adjust the amount of attenuation of the power of the input light for each wavelength. By configuring the wavelength selection switch (WSS) with one input and one output, it is possible to obtain output light in which the waveform of the input light is arbitrarily shaped.
- the optical control unit 120 can control the band of the naturally radiated amplified light to a range including the entire wavelength band of the wavelength division multiplexing signal light propagating in the optical submarine cable system. Further, the optical control unit 120 uses the power of natural emission amplified light so that the power of each branched light branched by the optical branching unit 130 matches the total input power of the submarine repeaters constituting the optical submarine cable system. Can be configured to control. The optical control unit 120 may output the power of the naturally emitted amplified light without limiting it.
- a multi-branch optical splitter can typically be used as the optical branch 130.
- the controlled light generation method first, natural emission amplified light is generated. Then, the band and power of this natural emission amplified light are controlled to generate waveform-shaped natural emission light. After that, this waveform-shaped natural radiation is branched into a plurality of branched lights.
- generating the above-mentioned natural emission amplified light can include exciting a rare earth element contained in the core of the optical waveguide with excitation light. Further, the generation of the waveform-shaped natural radiation can include adjusting the power of the spontaneous emission amplification light for each wavelength.
- the light source device 100 and the control light generation method of the present embodiment it is possible to constantly monitor a large number of unused optical fiber transmission lines in the optical submarine cable system.
- FIG. 2 shows the configuration of the light source device 200 according to the present embodiment.
- the light source device 200 in addition to the light generation unit (light generation means) 110, the light control unit (light control means) 120, and the optical branching unit (optical branching means) 130, the light source device 200 includes a first connecting unit (first connecting means). ) 240 further.
- the light source device 200 is preferably used for an optical submarine cable system.
- the light generation unit 110 generates natural emission amplified light.
- the optical control unit 120 controls the band and power of the natural emission amplified light to generate waveform-shaped natural emission light.
- the optical branching unit 130 branches this waveform-shaped natural synchrotron radiation into a plurality of branched lights.
- the first connection unit 240 is configured to introduce a plurality of branched lights into a plurality of interface devices 10 provided for each of the plurality of optical transmission lines 20.
- an optical adapter for connecting an optical fiber through which branched light propagates can typically be used.
- Each of the plurality of optical transmission lines 20 includes an optical fiber transmission line, and each optical fiber transmission line constitutes a fiber pair (Fiber Pair: FP) composed of an optical fiber for an uplink and an optical fiber for a downlink.
- each fiber pair (FP) is an unused optical fiber (dark fiber) in which the main signal light is not propagated. That is, a transponder, which is a main signal source, is not connected to each interface device 10.
- the optical control unit 120 can be configured to control the band and power of the naturally radiated amplified light according to the number of the plurality of interface devices 10. Specifically, when the number of interface devices 10 connected to each of a large number of fiber pairs (for example, 8 fiber pairs or more) is large (for example, 8 or more), the optical control unit 120 limits the power of the natural emission amplified light. It can be configured to output without doing anything.
- the controlled light generation method first, natural emission amplified light is generated. Then, the band and power of this natural emission amplified light are controlled to generate waveform-shaped natural emission light. After that, this waveform-shaped natural radiation is branched into a plurality of branched lights. The configuration up to this point is the same as the control light generation method according to the first embodiment.
- a plurality of branched lights are further introduced into a plurality of interface devices provided for each of the plurality of optical transmission lines.
- the band and power of the natural emission amplified light can be controlled according to the number of a plurality of interface devices.
- the light source device 200 and the control light generation method of the present embodiment it is possible to constantly monitor a large number of unused optical fiber transmission lines in the optical submarine cable system.
- FIG. 3 shows the configuration of the light source device 300 according to the present embodiment.
- the light source device 300 includes a light generation unit (light generation means) 110, an optical control unit (optical control means) 120, an optical branching unit (optical branching means) 130, and a first connecting unit (first connecting means) 240. In addition, it further has a second connecting portion (second connecting means) 340.
- the light source device 300 is preferably used for an optical submarine cable system.
- the same components as those of the light source device 200 according to the second embodiment are designated by the same reference numerals, and detailed description thereof may be omitted.
- the light generation unit 110 generates natural emission amplified light.
- the optical control unit 120 controls the band and power of the natural emission amplified light to generate waveform-shaped natural emission light.
- the second connection unit 340 is configured to introduce waveform-shaped natural radiation into the operational interface device 12 included in the plurality of interface devices.
- an optical adapter for connecting an optical fiber through which waveform-shaped natural synchrotron radiation propagates can be typically used.
- the operation interface device 12 corresponds to the operation optical transmission line 22 in which the main signal light propagates among the plurality of optical transmission lines. That is, a transponder, which is a main signal source, is connected to the operation interface device 12.
- the optical control unit 120 can be configured to control the band and power of the naturally radiated amplified light according to the characteristics of the operating optical transmission line 22. A specific description will be given below with reference to the drawings.
- FIG. 4A shows the spectrum of waveform-shaped natural synchrotron radiation generated by the optical control unit 120 included in the light source device 200 according to the second embodiment.
- the waveform-shaped natural synchrotron radiation is branched by the optical branching portion 130 and then introduced into an unused optical fiber (dark fiber) in which the main signal light is not propagated.
- the branched light may be introduced as dummy light so that an optical pulse can be introduced. Therefore, as shown in FIG. 4A, the optical control unit 120 outputs continuous waveform-shaped natural emission light at full power without limiting the power of the natural emission amplified light.
- each of the plurality of branched lights branched by the optical branching unit 130 can have a required power.
- the optical control unit 120 is configured to control the band and power of the natural emission amplified light according to the characteristics of the operational optical transmission line 22. Specifically, for example, the optical control unit 120 controls the band of the naturally radiated amplified light to either an odd number channel or an even number channel in the wavelength division multiplexing (WDM), and shapes it into a comb-shaped waveform.
- WDM wavelength division multiplexing
- the power of the spontaneous emission amplified light (broken line in FIG. 4B) generated by the light generation unit 110 is controlled to about half so that the high and low power levels can be controlled.
- OSNR optical signal-to-noise ratio
- each optical transmission line 20 is an unused optical fiber (dark fiber) in which the main signal light is not propagated.
- FP fiber pair
- the operation is performed with the light source device 200.
- the connection with the interface device 12 is deleted.
- the ASE light source device 500 including the light generation unit 110 and the light control unit 120 is connected to the operation interface device 12.
- the light source device 300 according to the present embodiment may be used as the ASE light source device 500.
- the unused optical fiber transmission line is monitored by using the light source device 200, and the wavelength dependence of loss and gain in the operation optical transmission line 22 by using the ASE light source device 500 or the light source device 300. Can be compensated.
- the transponder is connected to each of the plurality of interface devices, and then the light source device 300 according to the present embodiment is connected to the operation interface device 12 to which the transponder is finally connected. Can be done.
- the light source device 300 changes the connection between the optical control unit 120 and the optical branching unit 130 in the light source device 200 according to the second embodiment to a connection between the optical control unit 120 and the second connection unit 340. It can be configured (see FIGS. 2 and 3). Therefore, as the light source device 300, it is possible to reuse the light source device 200 used for monitoring unused optical fibers (dark fibers).
- the controlled light generation method first, natural emission amplified light is generated. Then, the band and power of this natural emission amplified light are controlled to generate waveform-shaped natural emission light. After that, this waveform-shaped natural radiation is branched into a plurality of branched lights.
- the waveform-shaped natural synchrotron radiation is further supplied to the operation interface device included in the plurality of interface devices provided for each of the plurality of optical transmission lines.
- the operation interface device corresponds to the operation optical transmission line in which the main signal light propagates among the plurality of optical transmission lines. Further, when the waveform-shaped natural radiation is generated, the band and power of the natural emission amplified light can be controlled according to the characteristics of the operational optical transmission line.
- the light source device 300 and the control light generation method of the present embodiment it is possible to compensate for the wavelength dependence of loss and gain in the operation optical transmission line.
- FIG. 7 shows the configuration of the optical device 1000 according to the present embodiment.
- the optical device 1000 includes a light source device 1100 and a plurality of interface devices 1200.
- the optical device 1000 is preferably used for an optical submarine cable system.
- the light source device 1100 any one of the light source device 100 according to the first embodiment, the light source device 200 according to the second embodiment, and the light source device 300 according to the third embodiment can be used. Therefore, the light source device 1100 can generate a plurality of branched lights 1001. Each of the plurality of branched lights 1001 can be used as dummy light for monitoring an unused optical fiber (dark fiber).
- Each of the plurality of interface devices 1200 includes an optical combining unit (optical combining means) 1210 that combines one of the plurality of branched lights 1001 and the monitoring optical signal 1002.
- the monitoring optical signal 1002 can be, for example, an optical pulse used in an OTDR (Optical Time Domain Reflectometer) method.
- the monitoring light generation method first, a plurality of branched lights are generated. Then, one of the plurality of branched lights and the monitoring optical signal are combined.
- any of the control light generation methods according to the first to third embodiments can be used.
- a large number of unused optical fiber transmission lines can be constantly monitored in the optical submarine cable system.
- Appendix 2 The light source device according to Appendix 1, further comprising a first connection means configured to introduce the plurality of branched lights into a plurality of interface devices provided for each of the plurality of optical transmission lines.
- Appendix 3 The light source device according to Appendix 2, wherein the optical control means controls the band and power of the natural emission amplified light according to the number of the plurality of interface devices.
- the operation interface device further includes a second connection means configured to introduce the waveform-shaping natural synchrotron radiation into an operation interface device included in the plurality of interface devices, and the operation interface device includes the plurality of operation interface devices.
- the light source device according to Appendix 2 which corresponds to an operational optical transmission line in which the main signal light propagates among the optical transmission lines.
- Appendix 5 The light source device according to Appendix 4, wherein the optical control means controls the band and power of the natural emission amplified light according to the characteristics of the operational optical transmission line.
- Appendix 7 The light source device according to any one of Appendix 1 to 6, wherein the optical control means includes a wavelength selection switch.
- the light source device according to any one of the items 2 to 5 and the plurality of interface devices are included, and the plurality of interface devices are used for monitoring with one of the plurality of branched lights, respectively.
- An optical device including an optical combining means for combining optical signals.
- Control light that generates natural radiation amplified light, controls the band and power of the natural radiation amplified light to generate waveform-shaped natural emission light, and branches the waveform-shaped natural radiation light into a plurality of branched lights. Generation method.
- Appendix 10 The control light generation method according to Appendix 9, wherein the plurality of branched lights are introduced into a plurality of interface devices provided for each of the plurality of optical transmission lines.
- Appendix 11 The control light generation method according to Appendix 10, wherein generating the waveform-shaped natural synchrotron radiation includes controlling the band and power of the spontaneous emission amplified light according to the number of the plurality of interface devices. ..
- the waveform-shaped natural radiated light is supplied to an operation interface device included in a plurality of interface devices provided for each of the plurality of optical transmission lines, and the operation interface device is mainly used among the plurality of optical transmission lines.
- (Appendix 16) A monitoring light that generates the plurality of branched lights by the control light generation method described in any one of the items 9 to 15 and combines one of the plurality of branched lights with a monitoring optical signal. Generation method.
- Light source device 110 Light generation unit 120
- Optical control unit 130 Optical branch unit 240
- First connection unit 340 Second connection unit 500
- ASE light source device 10 Interface device 12
- Operation interface device 20 Optical transmission line 22
- Operation optical transmission Road 1000 Optical device 1001
- Branch light 1002 Monitoring optical signal 1100
- Light source device 1200 Interface device 1210 Optical junction
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Abstract
Description
図1は、本発明の第1の実施形態に係る光源装置100の構成を示すブロック図である。光源装置100は、光生成部(光生成手段)110、光制御部(光制御手段)120、および光分岐部(光分岐手段)130を有する。光源装置100は、好適には光海底ケーブルシステムに用いられる。
次に、本発明の第2の実施形態について説明する。図2に、本実施形態による光源装置200の構成を示す。光源装置200は、光生成部(光生成手段)110、光制御部(光制御手段)120、および光分岐部(光分岐手段)130に加えて、第1の接続部(第1の接続手段)240をさらに有する。光源装置200は、好適には光海底ケーブルシステムに用いられる。
次に、本発明の第3の実施形態について説明する。図3に、本実施形態による光源装置300の構成を示す。光源装置300は、光生成部(光生成手段)110、光制御部(光制御手段)120、光分岐部(光分岐手段)130、および第1の接続部(第1の接続手段)240に加えて、第2の接続部(第2の接続手段)340をさらに有する。光源装置300は、好適には光海底ケーブルシステムに用いられる。なお、第2の実施形態による光源装置200と同一の構成については同一の符号を付し、その詳細な説明は省略する場合がある。
次に、本発明の第4の実施形態について説明する。図7に、本実施形態による光装置1000の構成を示す。光装置1000は、光源装置1100と、複数のインターフェイス装置1200とを有する。光装置1000は、好適には光海底ケーブルシステムに用いられる。
110 光生成部
120 光制御部
130 光分岐部
240 第1の接続部
340 第2の接続部
500 ASE光源装置
10 インターフェイス装置
12 運用インターフェイス装置
20 光伝送路
22 運用光伝送路
1000 光装置
1001 分岐光
1002 監視用光信号
1100 光源装置
1200 インターフェイス装置
1210 光合波部
Claims (16)
- 自然放射増幅光を生成する光生成手段と、
前記自然放射増幅光の帯域およびパワーを制御して波形整形自然放射光を生成する光制御手段と、
前記波形整形自然放射光を複数の分岐光に分岐する光分岐手段、とを有する
光源装置。 - 前記複数の分岐光を、複数の光伝送路ごとに設けられる複数のインターフェイス装置にそれぞれ導入するように構成された第1の接続手段をさらに有する
請求項1に記載した光源装置。 - 前記光制御手段は、前記複数のインターフェイス装置の個数に応じて前記自然放射増幅光の帯域およびパワーを制御する
請求項2に記載した光源装置。 - 前記波形整形自然放射光を、前記複数のインターフェイス装置に含まれる運用インターフェイス装置に導入するように構成された第2の接続手段をさらに有し、
前記運用インターフェイス装置は、前記複数の光伝送路のうち主信号光が伝搬する運用光伝送路に対応する
請求項2に記載した光源装置。 - 前記光制御手段は、前記自然放射増幅光の帯域およびパワーを、前記運用光伝送路の特性に応じて制御する
請求項4に記載した光源装置。 - 前記光生成手段は、コアに希土類元素を含む光導波路、および前記希土類元素を励起する励起光を生成する励起レーザを備える
請求項1から5のいずれか一項に記載した光源装置。 - 前記光制御手段は、波長選択スイッチを備える
請求項1から6のいずれか一項に記載した光源装置。 - 請求項2から5のいずれか一項に記載した光源装置と、前記複数のインターフェイス装置とを有し、
前記複数のインターフェイス装置はそれぞれ、前記複数の分岐光のうちの一と監視用光信号を合波する光合波手段を備える
光装置。 - 自然放射増幅光を生成し、
前記自然放射増幅光の帯域およびパワーを制御して波形整形自然放射光を生成し、
前記波形整形自然放射光を複数の分岐光に分岐する
制御光生成方法。 - 前記複数の分岐光を、複数の光伝送路ごとに設けられる複数のインターフェイス装置にそれぞれ導入する
請求項9に記載した制御光生成方法。 - 前記波形整形自然放射光を生成することは、前記複数のインターフェイス装置の個数に応じて前記自然放射増幅光の帯域およびパワーを制御することを含む
請求項10に記載した制御光生成方法。 - 前記波形整形自然放射光を、複数の光伝送路ごとに設けられる複数のインターフェイス装置に含まれる運用インターフェイス装置に供給し、
前記運用インターフェイス装置は、前記複数の光伝送路のうち主信号光が伝搬する運用光伝送路に対応する
請求項9に記載した制御光生成方法。 - 前記波形整形自然放射光を生成することは、前記自然放射増幅光の帯域およびパワーを、前記運用光伝送路の特性に応じて制御することを含む
請求項12に記載した制御光生成方法。 - 前記自然放射増幅光を生成することは、光導波路のコアに含まれる希土類元素を励起光により励起することを含む
請求項9から13のいずれか一項に記載した制御光生成方法。 - 前記波形整形自然放射光を生成することは、前記自然放射増幅光のパワーを波長ごとに調整することを含む
請求項9から14のいずれか一項に記載した制御光生成方法。 - 請求項9から15のいずれか一項に記載した制御光生成方法により前記複数の分岐光を生成し、
前記複数の分岐光のうちの一と監視用光信号を合波する
監視光生成方法。
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JPH08234250A (ja) * | 1995-02-24 | 1996-09-13 | Nippon Telegr & Teleph Corp <Ntt> | 波長多重信号光発生装置 |
US20090208212A1 (en) * | 2008-02-19 | 2009-08-20 | Kwan-Il Lee | Bidirectional wavelength-division-multiplexed passive optical network |
JP2015021826A (ja) * | 2013-07-18 | 2015-02-02 | 日本電信電話株式会社 | 光パルス試験装置及び光パルス試験方法 |
JP2015070358A (ja) * | 2013-09-27 | 2015-04-13 | 日本電気株式会社 | 光線路障害検知装置および光線路障害検知方法 |
JP2016063240A (ja) * | 2014-09-12 | 2016-04-25 | Necエンジニアリング株式会社 | 光伝送装置 |
JP2020053852A (ja) * | 2018-09-27 | 2020-04-02 | 東日本電信電話株式会社 | 光送受信器と光給電システム |
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JPH08234250A (ja) * | 1995-02-24 | 1996-09-13 | Nippon Telegr & Teleph Corp <Ntt> | 波長多重信号光発生装置 |
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JP2020053852A (ja) * | 2018-09-27 | 2020-04-02 | 東日本電信電話株式会社 | 光送受信器と光給電システム |
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