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WO2018168702A1 - Dispositif et système d'émission/réception de lumière cohérente - Google Patents

Dispositif et système d'émission/réception de lumière cohérente Download PDF

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Publication number
WO2018168702A1
WO2018168702A1 PCT/JP2018/009255 JP2018009255W WO2018168702A1 WO 2018168702 A1 WO2018168702 A1 WO 2018168702A1 JP 2018009255 W JP2018009255 W JP 2018009255W WO 2018168702 A1 WO2018168702 A1 WO 2018168702A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
coherent optical
optical transceiver
heater
coherent
Prior art date
Application number
PCT/JP2018/009255
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English (en)
Japanese (ja)
Inventor
淳 潮田
Original Assignee
日本電気株式会社
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.)
Filing date
Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP2019505974A priority Critical patent/JPWO2018168702A1/ja
Publication of WO2018168702A1 publication Critical patent/WO2018168702A1/fr

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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
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/024—Arrangements for thermal management

Definitions

  • the present invention relates to a coherent optical transceiver and a coherent optical transceiver system.
  • An optical communication module is a key device of an optical network system, and with the increase in the speed and capacity of the system, the optical communication module is required to be downsized, increased in speed, and reduced in price.
  • Digital coherent communication using multi-level phase modulation is generally used as a means for solving an increase in capacity of an optical communication system.
  • Coherent optical transceivers for digital coherent communication are also required to be reduced in price while satisfying high speed and downsizing. In order to realize a low price, it is necessary to reduce the cost by reducing the cost of the component parts and shortening the adjustment / test process that occurs in the manufacturing process.
  • the coherent optical transmitter / receiver is accommodated in a data center or a station building. For this reason, the operating environment of a product is often a relatively warm environment, but it is required to be able to guarantee operation under severe temperature conditions similar to general optical transceivers. It is also a factor.
  • a coherent optical transceiver generally represented as an optical transceiver includes an optical module group such as a laser light source, an optical modulator, an optical receiver module, and a photodiode, and a plurality of driver amplifiers or data for controlling the optical modulator. It consists of an IC (Integrated Circuit) such as a digital signal processing unit that controls signals and the entire apparatus.
  • IC Integrated Circuit
  • Such a device is manufactured on the assumption that the outer surface temperature of the device is used under a use temperature condition of 0 ° C. to 80 ° C., for example. Therefore, it is necessary to select components that can withstand use in such a temperature range as components built in the apparatus.
  • the coherent optical transmission / reception apparatus it is necessary to adjust the optical output and the optical waveform quality to an optimum state in the entire temperature range and to perform a temperature characteristic test for confirming the result.
  • the adjustment and confirmation test for interpolating the temperature characteristics of the built-in optical module and coherent optical transmitter / receiver extends from several hours to several tens of hours, and it is necessary to use expensive inspection equipment, which is a factor of high manufacturing cost.
  • the coherent optical transceiver is a combination of a plurality of optical modules
  • the coherent optical transmitter / receiver is a large and high heating element compared to the optical module, and it is difficult to control the temperature of the entire product using a Peltier element or the like.
  • Patent Document 1 The technique described in Patent Document 1 is characterized by adjusting the temperature of a single optical element, and the temperature of the entire apparatus cannot be adjusted. Thereby, there exists a problem that the man-hour and cost concerning manufacture of an apparatus cannot be reduced.
  • An object of the present invention is to provide a coherent optical transmitter / receiver and a coherent optical transmitter / receiver system that solve the above-described problems.
  • the coherent optical transceiver of the present invention is A heater for heating the interior of the coherent optical transceiver, A temperature sensor for measuring the internal temperature of the coherent optical transceiver, And a temperature control unit that controls the heater unit so that the temperature measured by the temperature sensor is included in a predetermined range.
  • the coherent optical transmission / reception system of the present invention is A coherent optical transceiver, and a temperature controller
  • the coherent optical transceiver is A heater for heating the interior of the coherent optical transceiver, A temperature sensor that measures the internal temperature of the coherent optical transceiver, The temperature control device controls the heater unit so that the temperature measured by the temperature sensor is included in a predetermined range.
  • FIG. 1 is a diagram illustrating a first embodiment of a coherent optical transceiver according to the present invention.
  • the coherent optical transceiver 100 according to the present invention includes a heater unit 110, a temperature sensor 120, and a temperature control unit 130.
  • FIG. 1 shows an example of main components related to the present embodiment among the components included in the coherent optical transceiver according to the present invention.
  • the heater unit 110 warms the inside of the coherent optical transceiver 100.
  • the temperature sensor 120 measures the internal temperature of the coherent optical transceiver 100.
  • the temperature control unit 130 controls the heater unit 110 so that the temperature measured by the temperature sensor 120 is included in a predetermined range.
  • FIG. 2 is a diagram showing a second embodiment of the coherent optical transceiver according to the present invention.
  • the coherent optical transceiver 101 according to the present invention includes a heater unit 111, a temperature sensor 121, and a temperature control unit 131.
  • FIG. 2 shows an example of main components related to the present embodiment among the components included in the coherent optical transceiver according to the present invention.
  • the heater unit 111 warms the inside of the coherent optical transceiver 101.
  • the temperature sensor 121 measures the internal temperature of the coherent optical transceiver 101.
  • the temperature control unit 131 controls the heater unit 111 so that the temperature measured by the temperature sensor 121 is included in a predetermined range.
  • the temperature control unit 131 controls the heater unit 111 so that the temperature measured by the temperature sensor 121 is included in a predetermined range by controlling the calculation amount of an arithmetic circuit mounted inside the coherent optical transceiver 101. It may be a thing.
  • the coherent optical transceiver 101 includes an optical module group such as a laser light source, an optical modulator, an optical receiver module, and a photodiode, a plurality of driver amplifiers that control the modulator, and data It incorporates a digital signal processing unit that controls signals and the entire apparatus. All of these components are heat sources, and among them, the digital signal processing unit has a high heat generation amount. Due to the influence of these heat sources, even when operating at an ambient temperature of 25 ° C., the entire apparatus may reach a temperature exceeding 50 ° C. immediately after the start of operation.
  • FIG. 3 is a diagram illustrating an example of a side view of the coherent optical transmission / reception device 101 according to the present embodiment.
  • the coherent optical transmission / reception device 101 includes a heat sink 141.
  • a heater unit 111 is provided at a lower part of a PCB (Printed Circuit Board) 151 provided inside the coherent optical transceiver 101, and a temperature sensor 121 and a temperature control unit 131 are provided at an upper part.
  • the temperature sensor 121 monitors the internal temperature of the coherent optical transmission / reception device 101, and the temperature control unit 131 controls the heater unit 111 so that the temperature inside the device becomes, for example, 75 ° C.
  • the ambient temperature is equivalent to 50 ° C.
  • the temperature in the apparatus reaches 75 ° C. without driving the heater unit 111, so the temperature control is cut off.
  • the temperature control unit 131 sets the energization amount to the heater unit 111 so that the temperature measured by the temperature sensor 121 becomes 75 ° C. Increase the temperature control.
  • the temperature control unit 131 performs temperature control, the inside of the apparatus is always operated at 75 ° C., so that the operating temperature of the apparatus can be limited regardless of the surrounding environment.
  • FIG. 4 is a diagram showing an example of temperature dependency of driver amplifier settings.
  • the output amplitude of the driver amplifier at 25 ° C. is set to 6 V and the cross point of the output waveform of the optical modulator is set to an ideal state of 50%, the amplitude decreases by 0.13 V at 55 ° C.
  • the cross point is reduced by 2%. Since this temperature dependence becomes a cause of deterioration of the transmission characteristics of the product, in general, adjustment is performed over the entire temperature range in which the product guarantees temperature so that this error can be ignored.
  • the heater built-in type shown in this embodiment the product operating temperature can be made constant and temperature compensation can be made unnecessary.
  • FIG. 5 is a diagram showing an example of a structure when the heater 111 shown in FIG. 2 has a cylindrical shape.
  • the coherent optical transmitter / receiver 101 includes a cylindrical heater insertion hole A161 for enclosing the cylindrical heater 112 when the heater 111 shown in FIG. 2 has a cylindrical shape, and heater insertion. Hole B171.
  • the cylindrical heater 112 is sealed in the heater insertion hole A161 provided at the lower part of the PCB 151 shown in FIG. 3, the entire product can be warmed using the radiant heat from the PCB 151.
  • the cylindrical heater 112 is enclosed in the heater insertion hole B171 provided in the upper part of the PCB 151 shown in FIG. 3, the product can be warmed from the upper part of the PCB 151.
  • FIG. 6 is a diagram illustrating an example of a structure when the heater unit 111 illustrated in FIG. 2 has a plate shape.
  • the coherent optical transceiver 101 is divided into an upper lid 181 with a heat sink and a base 191, and the heater 111 shown in FIG.
  • a plate heater 113 is provided.
  • the plate heater 113 is supplied with power from the outside via a lead wire 192.
  • the plate heater 113 it is possible to use the radiant heat. In this case, the entire product can be warmed by arranging a PCB substrate or an optical module on the upper surface of the plate heater 113.
  • FIG. 7 is a diagram showing a third embodiment of the coherent optical transceiver according to the present invention.
  • the coherent optical transmission / reception device 102 according to the present embodiment causes an external device to perform temperature control.
  • FIG. 7 shows a third embodiment of the coherent optical transceiver according to the present invention.
  • the coherent optical transmission / reception device 102 includes a heater unit 111 and a temperature sensor 121, and the temperature control device 201 provided outside the coherent optical transmission / reception device 102 measures the temperature sensor 121.
  • the heater unit 111 is controlled so that the temperature falls within a predetermined range.
  • the coherent light transmission / reception device 102 and the temperature control device 201 constitute a coherent light transmission / reception system.
  • the temperature control device 201 controls energization to the heater unit 111 to control the temperature.
  • it is possible to perform more precise temperature control by simultaneously controlling the fan air volume blown to the heat sink 141 provided on the upper surface of the coherent optical transceiver 102 by the temperature controller 201.
  • the configuration of the coherent optical transmitter / receiver 102 is provided by providing a heater energization unit that can control the temperature from the outside. Is feasible.
  • FIG. 8 is a side view of a configuration example in which a heater function is built in a CFP (Centum gigbit Form Factor Pluggable) type package structure.
  • the heater unit 111 may be provided in the lower part of the PCB 151, or the heater part 111 may be provided between the upper part of the PCB 151 and the heat sink 141.
  • the CFP type which is the industry standard of 100G Ethernet, is small in size and more densely mounted. Therefore, the temperature rise using a heater is easy.
  • both the case where the temperature control is set to the internal control and the case where the temperature control is set to the external control can be selected depending on the way of energizing the heater unit 111.
  • the entire coherent optical transceiver 102 can be operated at a constant temperature at all times, and the operation guarantee temperature of the built-in optical module components is constant or
  • the temperature range can be limited to a limited range. Therefore, the manufacturing / inspection cost is reduced.
  • the adjustment / testing process of the coherent optical transceiver can be limited to only one operating temperature or a very limited temperature range. Therefore, the manufacturing cost of the coherent optical transceiver can be reduced.
  • the operating temperature of the product is adjusted to a high temperature, the system can be designed on the assumption of fanless operation of the system.
  • Examples of the coherent optical transmission / reception device include CFP2 / CFP4 and the like as well as 40G / 100G / 200G / 400G digital coherent transceivers.
  • the number of optical modules that are components of the coherent optical transmission / reception apparatus is assumed to be not only one but also plural.
  • the heat generated in the built-in digital signal processing unit itself can be used as the heater unit. Increasing the amount of heat generated by causing the digital signal processing unit to perform a high-load operation in a pseudo manner, causing the digital signal processing unit to perform a low-load operation, or suppressing the amount of heat generation by stopping the operation
  • the temperature control of the coherent optical transmitter / receiver itself can be realized by only self-heating without providing a new heater section.
  • the arrangement of these components may be adjusted based on the amount of heat generated by the components mounted on the PCB 151. Moreover, about 70 degreeC +/- 5 degreeC can be considered for the temperature in an apparatus, for example.

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Communication System (AREA)

Abstract

La présente invention traite le problème de la réduction des heures-hommes et du coût de fabrication de dispositifs. La solution selon la présente invention comprend: une unité chauffante 110 servant à chauffer l'intérieur d'un dispositif 100 d'émission/réception de lumière cohérente; un capteur 120 de température qui mesure la température interne du dispositif 100 d'émission/réception de lumière cohérente; et une unité 130 de régulation de température qui commande l'unité chauffante 110 de telle façon que la température mesurée par le capteur 120 de température se situe à l'intérieur d'une plage prédéterminée.
PCT/JP2018/009255 2017-03-15 2018-03-09 Dispositif et système d'émission/réception de lumière cohérente WO2018168702A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019505974A JPWO2018168702A1 (ja) 2017-03-15 2018-03-09 コヒーレント光送受信装置およびコヒーレント光送受信システム

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-049790 2017-03-15
JP2017049790 2017-03-15

Publications (1)

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WO2018168702A1 true WO2018168702A1 (fr) 2018-09-20

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WO (1) WO2018168702A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001094200A (ja) * 1999-09-21 2001-04-06 Hitachi Ltd 半導体レーザモジュール
WO2005020320A1 (fr) * 2003-08-22 2005-03-03 The Kansai Electric Power Co., Inc. Dispositif a semi-conducteur, procede de fabrication et convertisseur de puissance utilisant ce dispositif a semi-conducteur
JP2013084006A (ja) * 2013-01-15 2013-05-09 Hitachi Cable Ltd 光送受信器
JP2013258597A (ja) * 2012-06-13 2013-12-26 Nec Corp 光トランシーバ、及びその光トランシーバの温度制御方法
JP2014022247A (ja) * 2012-07-20 2014-02-03 Kyocera Corp セラミックヒーター
US20150037043A1 (en) * 2011-11-01 2015-02-05 Lightron Fiber-Optic Devices Inc. Optical Transceiver Capable of Controlling Self-Heating According to Temperature
JP2015079092A (ja) * 2013-10-16 2015-04-23 住友電気工業株式会社 全二重光トランシーバ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7369587B2 (en) * 2004-02-21 2008-05-06 Finisar Corp Temperature control for coarse wavelength division multiplexing systems
CA2824579A1 (fr) * 2011-01-17 2012-07-26 Mitsubishi Electric Corporation Module de source de lumiere laser
JP2012168410A (ja) * 2011-02-15 2012-09-06 Nec Corp 光送信装置、光送受信装置、制御方法および制御プログラム
JP6232986B2 (ja) * 2013-12-05 2017-11-22 住友電気工業株式会社 光送信器
CN106797253A (zh) * 2014-10-08 2017-05-31 日本电气株式会社 光发射器和光收发器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001094200A (ja) * 1999-09-21 2001-04-06 Hitachi Ltd 半導体レーザモジュール
WO2005020320A1 (fr) * 2003-08-22 2005-03-03 The Kansai Electric Power Co., Inc. Dispositif a semi-conducteur, procede de fabrication et convertisseur de puissance utilisant ce dispositif a semi-conducteur
US20150037043A1 (en) * 2011-11-01 2015-02-05 Lightron Fiber-Optic Devices Inc. Optical Transceiver Capable of Controlling Self-Heating According to Temperature
JP2013258597A (ja) * 2012-06-13 2013-12-26 Nec Corp 光トランシーバ、及びその光トランシーバの温度制御方法
JP2014022247A (ja) * 2012-07-20 2014-02-03 Kyocera Corp セラミックヒーター
JP2013084006A (ja) * 2013-01-15 2013-05-09 Hitachi Cable Ltd 光送受信器
JP2015079092A (ja) * 2013-10-16 2015-04-23 住友電気工業株式会社 全二重光トランシーバ

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