WO2014166108A1 - 基于多载波的光发射子系统及产生光信号的方法 - Google Patents

基于多载波的光发射子系统及产生光信号的方法 Download PDF

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Publication number
WO2014166108A1
WO2014166108A1 PCT/CN2013/074142 CN2013074142W WO2014166108A1 WO 2014166108 A1 WO2014166108 A1 WO 2014166108A1 CN 2013074142 W CN2013074142 W CN 2013074142W WO 2014166108 A1 WO2014166108 A1 WO 2014166108A1
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Prior art keywords
micro
ring
light source
light
optical signals
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PCT/CN2013/074142
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English (en)
French (fr)
Inventor
宋小鹿
曾理
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380000283.3A priority Critical patent/CN103518338B/zh
Priority to PCT/CN2013/074142 priority patent/WO2014166108A1/zh
Priority to EP13881480.1A priority patent/EP2985932B1/en
Publication of WO2014166108A1 publication Critical patent/WO2014166108A1/zh
Priority to US14/880,069 priority patent/US20160036548A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50Transmitters
    • H04B10/501Structural aspects
    • H04B10/506Multiwavelength transmitters

Definitions

  • the present invention relates to optical communication technologies, and more particularly to a multi-carrier based optical emission subsystem and a method of generating an optical signal.
  • optical transceiver components related technologies are also evolving. High-speed, low-cost, low-power, and miniaturized optical components have gradually become the focus of attention in the industry.
  • Wavelength Division Multiplexing (WDM) light source combined with optical wavelength division multiplexer combined output is The only way to integrate light-emitting components.
  • a WDM light source there are various methods for generating a WDM light source, such as directly using a multi-channel light-emitting device of different wavelengths, or a comb-shaped light source or a WDM light source.
  • the comb light source is based on a circular feedback cavity design, and its basic components include a frequency shifter, a band pass filter, an optical amplifier, a coupler, etc., to realize a complex color light outputting a comb-like optical language.
  • the modulated signal is loaded by the comb-color spectrum of the comb-shaped light source
  • the light generated by the comb-shaped light source is first branched by the demultiplexer to obtain a plurality of single-frequency lights (that is, different monochromatic lights are obtained) or light.
  • the carrier wave is then loaded on the different monochromatic lights to obtain a plurality of optical signals of different frequencies, and then the optical signals of the plurality of different frequencies are combined and output by the wavelength division multiplexer.
  • the scheme has obvious advantages in more channel application scenarios, but there are many disadvantages for the case that the number of channels is relatively small, such as 8 channels and 10 channels, for example, the light of the comb spectrum is generated simultaneously through the feedback loop, and the same is utilized.
  • As a process of optical carrier it is necessary to use a demultiplexer to split, modulate, and then pass through a wavelength division multiplexer, and the implementation process is cumbersome.
  • embodiments of the present invention provide a multi-carrier based optical transmitting subsystem and a method for generating an optical signal to simplify a multi-carrier optical transmitting subsystem structure.
  • an embodiment of the present invention provides a multi-carrier based optical emission subsystem, including: a comb light source device for generating and outputting complex color light; a micro ring group including a plurality of micro ring modulators, Each of the micro-ring modulators includes an input end and a download end, and the input ends of the plurality of micro-ring modulators are respectively connected to the comb-shaped light source device, and the plurality of micro-ring modulators are configured to separately perform the complex color light Filtering and modulating to obtain optical signals of different frequencies and outputting through respective download ends; a common waveguide connected to the download ends of the plurality of micro-ring modulators for combining the optical signals of the different frequencies.
  • the comb light source device comprises: a light source; and at least one frequency shifting device connected to the light source for emitting the light source The light is shifted to obtain a complex light.
  • the multiple micro ring modulators when there is one of the frequency shifting devices, the multiple micro ring modulators are connected to the first a first waveguide connected to an output end of the frequency shifting device; and when there are a plurality of the frequency shifting devices, the number of micro ring modulators in the micro ring group is equal to or greater than the frequency shifting device
  • the number of the frequency shifting devices are connected in series through the second waveguide, and the output end of the frequency shifting device farthest from the light source is connected to the third waveguide, the third waveguide, each of the second waveguides At least one microring modulator in the set of microrings is connected, respectively.
  • the frequency shifting device is a phase modulator loaded with a microwave signal; When there are multiple devices, the microwave signals loaded by the respective phase modulators are the same.
  • any two adjacent frequency shifting devices are connected There is an optical amplifier.
  • the common waveguide has one or more When there is one common waveguide, the download ends of the plurality of micro ring modulators are connected to the common waveguide; when there are multiple common waveguides, the plurality of micro ring modulators are grouped into the common a plurality of micro-ring sub-groups having the same number of waveguides, and the micro-ring sub-groups are correspondingly connected to the common waveguide.
  • the method further includes: a temperature control device, configured to The comb source and the set of microrings provide a stable temperature environment.
  • a temperature control device configured to The comb source and the set of microrings provide a stable temperature environment.
  • an embodiment of the present invention provides a method for generating an optical signal, including: generating and outputting a complex color light by using a light source; and filtering and modulating the complex color light by using a plurality of microring modulators respectively to obtain different frequencies.
  • a plurality of optical signals of the different frequency optical signals are output to a common waveguide.
  • the use of a light source to generate and output complex light includes:
  • a plurality of cascaded frequency modulators loaded with the same microwave signal are used to shift the frequency of the light source step by step to obtain a plurality of complex color lights.
  • the outputting the plurality of optical signals of the different frequency optical signals to a common waveguide further includes:
  • the remaining optical signals other than the plurality of optical signals of the optical signals of different frequencies are output to at least one common waveguide.
  • the method further includes:
  • a stable temperature environment is provided for the light source and the microring modulator.
  • the multi-carrier based optical transmitting subsystem and the method for generating an optical signal provided by the foregoing embodiments filter and modulate the complex color light through the micro ring group to obtain optical signals of different frequencies, and output to the common waveguide through the respective download ends.
  • the utility model can not only separate the complex color light, but also load the modulated signal onto the filtered optical carrier to obtain optical signals of different frequencies, and can also connect the download end of the microring modulator in the micro ring group to the common waveguide, in the common waveguide.
  • the optical signals of different frequencies modulated by the middle multiplex are combined, so that the multi-carrier optical transmitting subsystem does not need to additionally provide a demultiplexer and a wavelength division multiplexer, which simplifies the structure of the multi-carrier optical transmitting subsystem and helps Reduce the cost of a multi-carrier optical emission subsystem.
  • FIG. 1 is a schematic diagram of a multi-carrier based optical transmission subsystem according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for generating an optical signal according to another embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a multi-carrier based optical emission subsystem according to another embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a composition of a micro-ring modulator waveguide in a multi-carrier based optical emission subsystem according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a connection between a micro-ring modulator and a common waveguide in a multi-carrier based optical transmitting subsystem according to another embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a multi-carrier based optical transmission subsystem according to another embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a multi-carrier based optical transmission subsystem according to an embodiment of the present invention.
  • the system includes: a comb light source device 11, a microring set 12, and a common waveguide 13.
  • the comb light source device 11 is for generating and outputting light of a complex color such as a comb-like light.
  • the micro ring group 12 includes a plurality of micro ring modulators, each of which includes an input end and a download end, and the input ends of the plurality of micro ring modulators are respectively connected to the comb light source device.
  • the plurality of micro-ring modulators are respectively configured to filter and modulate the complex color light to obtain optical signals of different frequencies, and output them through respective download ends.
  • micro-ring set 12 includes five micro-ring modulators, and each micro-ring modem responds to one monochromatic light or one frequency of light.
  • the complex light generated by the comb light source device 11 includes light having a frequency of fl (hereinafter simply referred to as light fl), light having a frequency of f2 (hereinafter simply referred to as light), light having a frequency of ⁇ (hereinafter simply referred to as light ⁇ ), and frequency.
  • the microring modulator W1 responds to the light fl, the microring.
  • the modulator W2 responds to the light
  • the microring modulator W3 responds to the light ⁇
  • the microring modulator W4 responds to the light f4
  • the microring modulator W5 responds to the light f5.
  • responding to light of one frequency means filtering out light of all other frequencies within the free spectral range other than the light, and using the light of the frequency of the response as an optical carrier for loading the modulated signal to obtain the frequency.
  • the microring modulator W1 responds to the light fl, that is, filters out light of other frequencies within the free optical range other than the light fl, and loads the modulated signal with the light fl to obtain an optical signal of frequency fl.
  • the microring modulator W2 outputs an optical signal of frequency
  • the microring modulator W3 outputs an optical signal of frequency ⁇
  • the microring modulator W4 outputs an optical signal of frequency f4
  • the output frequency of the microring modulator W5 is f5.
  • Light signal Each micro-ring modulator outputs an optical signal through its respective download terminal.
  • the plurality of micro-ring modulators respectively respond to light of one frequency, can not only separate the complex color light, but also can load the modulated signal onto the filtered optical carrier to obtain an optical signal, thereby avoiding the use of the multiplexer and simplifying the multiplex.
  • the structure of the carrier's optical emission subsystem helps to reduce the cost of the multi-carrier optical emission subsystem, making the generation of optical signals easier and more efficient.
  • the common waveguide 13 is connected to the download ends of the plurality of microring modulators for combining some or all of the optical signals of the different frequencies.
  • the download terminals of the micro-ring modulator W1, the micro-ring modulator W2, the micro-ring modulator W3, the micro-ring modulator W4, and the micro-ring modulator W5 are all connected to the common waveguide 13, and then at least the common waveguide 13
  • the optical signals of the five frequencies of fl, f2, ⁇ , f4, and f5 are mixed together to realize the combining.
  • the use of the wavelength division multiplexer is avoided, the structure of the multi-carrier optical transmission subsystem is further simplified, the cost of the multi-carrier optical transmission subsystem is reduced, and the generation of the optical signal is more convenient and efficient.
  • the common waveguide 13 may have one or more, that is, the output of the multi-carrier light-emitting subsystem may have one or more channels, each of which is output through a common waveguide.
  • the download terminals of all the microring modulators in the microring group 12 are connected to the common waveguide 13.
  • all of the microring modulators in the microring group 12 are grouped into a plurality of microring subgroups of the same number as the common waveguide 13, and the microring subgroups are correspondingly connected to the common waveguide 13.
  • the modulator W2, the micro-ring sub-group G2 includes a micro-ring modulator W3, a micro-ring modulator W4, a micro-ring modulator W5, a micro-ring modulator W1 in the micro-ring sub-group G1, and a download terminal of the micro-ring modulator W2.
  • Connected to one of the common waveguides 13 to realize the multiplex of the optical signals of fl and f2, and the download terminals of the micro-ring modulator W3, the micro-ring modulator W4, and the micro-ring modulator W5 in the micro-ring sub-group G2 are both connected to another
  • the common waveguides 13 are connected to realize the combining of the optical signals of ⁇ , f4, and f5.
  • the comb light source device may include: a light source and at least one frequency shifting device, the at least one frequency shifting device being connected to the light source for shifting the light emitted by the light source to obtain a complex color light.
  • the multi-carrier optical transmitting subsystem can generate complex color light without a feedback loop, further simplifying the structure of the multi-carrier optical transmitting subsystem, helping to reduce the cost of the multi-carrier optical transmitting subsystem, and generating the optical signal. It's easier and more efficient.
  • the microring modulators in the microring group 12 are each coupled to a first waveguide that is coupled to the output of the frequency shifting device.
  • the number of micro ring modulators in the micro ring group 12 is equal to or greater than the number of the frequency shifting devices, and the frequency shifting devices are connected in series through the second waveguide, and the farthest shift from the light source.
  • the output of the frequency device is connected to the third waveguide, and the third waveguide and each of the second waveguides are respectively connected with at least one microring modulator in the micro ring group 12.
  • the frequency shifting device may be a frequency shifter or a phase modulator.
  • the frequency shifting device is a phase modulator, a microwave signal is loaded, and when there are a plurality of frequency shifting devices, the microwave signals loaded by the respective phase modulators are the same.
  • an optical amplifier may be connected between any two adjacent frequency shifting devices to ensure that the complex light has sufficient energy to be transmitted backward.
  • the multi-carrier based light emitting subsystem may further include: a temperature control device, configured to provide a stable temperature environment for the comb light source device and the micro ring group.
  • a temperature control device configured to provide a stable temperature environment for the comb light source device and the micro ring group.
  • the light source and the microring group can use a common temperature control system to achieve relative locking of the wavelengths to ensure that the complex light and the optical frequency of the microring modulator response are relatively stable.
  • the multi-carrier optical transmitting subsystem provided by the above embodiment filters and modulates the complex color light through the micro ring group to obtain optical signals of different frequencies, and outputs the same to the common waveguide through the respective download terminals, thereby not only separating the complex color light.
  • the modulated signal is loaded onto the filtered optical carrier to obtain optical signals of different frequencies, and the different frequencies modulated in the common waveguide can be obtained by connecting the download end of the microring modulator in the microring group to the common waveguide.
  • the optical signals are combined so that the multi-carrier optical transmitting subsystem does not need to additionally provide a demultiplexer and a wavelength division multiplexer, which simplifies the structure of the multi-carrier optical transmitting subsystem and helps to reduce the multi-carrier light. The cost of the launch subsystem.
  • FIG. 2 is a flowchart of a method for generating an optical signal according to another embodiment of the present invention.
  • the method shown in this embodiment can be implemented by the system shown in FIG. 1, and includes: Step 21: Generate and output a complex color light by using a light source, such as light that generates and outputs a comb-like light.
  • Step 22 Filter and modulate the complex color light by using a plurality of micro ring modulators to obtain optical signals of different frequencies.
  • multiple micro-ring modulators respectively respond to light of one frequency, can not only separate the complex color light, but also load the modulated signal onto the filtered optical carrier to obtain an optical signal, thereby avoiding the use of the multiplexer and simplifying
  • the structure of the multi-carrier optical emission subsystem helps to reduce the cost of the multi-carrier optical emission subsystem, making the generation of optical signals easier and more efficient.
  • Step 23 Output a plurality of optical signals of the optical signals of different frequencies to a common waveguide.
  • part or all of the optical signals generated in step 22 are output to a common waveguide, and the optical signals are mixed in a common waveguide to achieve multiplexing, which avoids the use of the wavelength division multiplexer, and further simplifies the multi-carrier light emitter.
  • the structure of the system helps to reduce the cost of the multi-carrier optical emission subsystem, making the generation of optical signals easier and more efficient.
  • generating and outputting the complex light with a light source may include:
  • a phase modulator loaded with a microwave signal is used to frequency shift the above light source to obtain and output complex color light, so that the multi-carrier light emitting subsystem can generate complex color light without a feedback loop, thereby further simplifying multi-carrier light emission.
  • the structure of the subsystem helps to reduce the cost of the multi-carrier optical emission subsystem, making the generation of optical signals easier and more efficient.
  • generating and outputting the complex color light by using a light source may include: ??? shifting the light source stepwise by using a plurality of phase modulators loaded with the same microwave signal in series to obtain a plurality of complex color lights.
  • a plurality of phase modulators can still provide a complex color light that is satisfactory for use by more micro-ring modulators.
  • outputting the plurality of optical signals of the optical signals of different frequencies to the common waveguide may further include: outputting the remaining optical signals other than the plurality of optical signals to the at least one of the optical signals of the different frequencies On the public waveguide.
  • the plurality of micro-ring modulators can respectively output the optical signals to a common waveguide, as specifically described in the above system embodiment.
  • the method for generating an optical signal provided by the embodiment of the present invention may further include: A stable temperature environment is provided for the above-mentioned light source and micro-ring modulator to ensure that the complex light and the optical frequency of the micro-ring modulator response are relatively stable.
  • the complex color light is filtered and modulated by a plurality of modulators to obtain optical signals of different frequencies, and outputted to the common waveguide through the respective download terminals, thereby not only separating the complex color lights,
  • the modulated signal is loaded onto the filtered optical carrier to obtain optical signals of different frequencies, and can also be connected to the common waveguide through the download end of the micro-ring modulator, and the modulated optical signals of different frequencies are combined in the common waveguide.
  • the multi-carrier optical transmitting subsystem eliminates the need for additional demultiplexers and wavelength division multiplexers, simplifies the structure of the multi-carrier optical transmitting subsystem, and helps to reduce the cost of the multi-carrier optical transmitting subsystem.
  • the multi-wavelength light source can be generated by shifting the seed light source step by step by using the technical solution provided in the above embodiment, and filtering the single-wavelength load modulation signal through the filter, and then loading the signal. Multiple channel WDM output will greatly simplify the internal structure of multi-carrier optical transmitter components, and the application method is more flexible.
  • FIG. 3 is a schematic structural diagram of a multi-carrier based optical transmission subsystem according to another embodiment of the present invention.
  • the comb light source device in the embodiment includes a light source and a plurality of frequency shifting devices, and the frequency shifting device is a phase modulator, and each phase modulator Loaded with the same microwave signal.
  • the frequency shifting device is a phase modulator, and each phase modulator Loaded with the same microwave signal.
  • Two phase modulators and two microring modulators are shown in Figure 3, two phase modulators are cascaded and loaded with the same microwave signal, and each phase modulator is connected to a microring modulator.
  • the light source 31 generates an optical signal having a center frequency of f Q .
  • the external microwave signal source loads the signals V m sin ( 2n ) and V m respectively on the arms of the first phase modulator 32.
  • the complex color light obtained after the frequency shift is transmitted along the waveguide 38 (ie, the second waveguide described above), and coupled via the coupling waveguide 33 to enter the first microring modulator.
  • the straight waveguide of 34 is coupled into the ring waveguide.
  • the micro-ring modulator Since the micro-ring modulator has certain filtering characteristics, it only responds to a specific range of frequencies (eg, the first micro-ring modulator 34 only responds to the comb-like optical language)
  • the medium frequency is light
  • the micro-ring modulator 34 has both filtering and modulation functions, that is, the light of the response frequency or the filtered light having the frequency f ⁇ fo+f is loaded with the signal to be transmitted, Optical signal at a specific frequency.
  • the signal to be transmitted is from the first signal source.
  • the optical signal of the specific frequency is output from the download terminal of the microring modulator 34 (i.e., the first channel outputs a modulated optical signal having a frequency of fffo + f).
  • the first phase modulator 32 outputs the complex-color light of the frequency-shifted comb-like optical code into the second phase modulator 35, since the second phase modulator 35 is identical to the first phase modulator 32.
  • a microwave signal source is loaded with the same microwave signal, so the resulting frequency shift is similar.
  • the +2f s optical signal is output from the second channel.
  • the second microring modulator 37 is connected to the waveguide 39 (i.e., the third waveguide), and the complex color light output by the second phase modulator 35 is obtained by coupling the waveguide 36.
  • the number of WDM channels needs to continue to configure the third and fourth-level channels, and so on. Accordingly, the third, four phase modulators, and the third, four micro-ring modulators, and the like, and even more micro-ring modulators can continue to be configured.
  • the phase modulator can be equal to or less than the number of channels, and the number of microring modulators is equal to the number of channels, which is connected in a similar manner to FIG.
  • two or more microring modulators may be connected to the waveguide to which the output of one phase modulator is connected.
  • the optical amplifier 310 is an alternative device and is connected between two phase modulators.
  • the waveguide composition of the microring modulator such as the microring modulator 34 and the microring modulator 337 may be as shown in FIG. 4, and includes a straight waveguide 41, a straight waveguide 42 and a ring waveguide 43.
  • One end of the straight waveguide 41 is an input end ( That is, port 1), the other end is the through end (ie, port 2), and one end of the straight waveguide 42 is the upload end (ie, port 3), and the other end is the download end (ie, port 4).
  • the modulated optical signal is output to the channel through the download terminal.
  • the optical signals in each channel are combined and output through a common waveguide, as shown in Figure 5, the first
  • the download end of the microring modulator is connected to the common waveguide 51 through the channel 1
  • the download end of the second microring modulator is connected to the common waveguide 51 through the channel 2, and so on
  • the download end of the Nth microring modulator passes
  • the channel N is connected to the common waveguide 51, so that optical signals of different frequencies are combined and output through the common waveguide 51, and no additional optical wavelength division multiplexing device is introduced, which simplifies the structure of the multi-carrier optical emission subsystem and helps to reduce the cost. .
  • FIG. 6 is a schematic structural diagram of a multi-carrier based optical emission subsystem according to another embodiment of the present invention. This embodiment is similar to the embodiment shown in FIG. 3. By adjusting the operating point of the phase modulator, the relative intensity between the center frequency and the side lobes can be controlled, except that there is one frequency shifting device in the embodiment. For applications with fewer channels.
  • the microring group includes N microring modulators: a microring modulator 631, a microring modulator 632, a microring modulator 63N, respectively filtering and modulating the complex color light of the comb-like optical language, and N different modulations
  • the signal is loaded onto the different frequencies of the complex color light, and then through the N channels: channel 1, channel 2, ... channel N output to the common waveguide (see Figure 5 for details) to achieve the combined output.
  • N different modulation signals are from N signal sources: signal source 1, signal source 2, ... signal source N.
  • the light in the micro-ring modulator can also be monitored, and the monitoring mode is the same as that in the embodiment shown in FIG. 3, and details are not described herein again.
  • the frequency shift of the light source is realized by providing a frequency signal to the microwave signal source by the dual-arm loading of the phase modulator, thereby generating a multi-carrier output, that is, a complex color light of a comb spectrum, and then passing through the micro-ring modulator.
  • the complex-color light obtained by frequency shifting is filtered and modulated to obtain optical signals of different frequencies, and the downloading ends of the micro-ring modulators are connected to the common waveguide by using the characteristics of the micro-ring modulator to realize the combination of optical signals of different frequencies.
  • the wave the device that omits the demultiplexer and the wavelength division multiplexing device can also realize the multi-channel modulated optical signal multiplexed output, simplifies the structure of the multi-carrier based optical emission subsystem, and helps to reduce the light emission.
  • the cost of the subsystem increases the efficiency of generating optical signals.
  • the foregoing embodiment is more suitable for a WDM optical transmission scenario with a smaller number of channels, and a microring modulator for implementing filtering and modulation is introduced, and the multiplexed wave is realized by connecting the download end thereof to the common waveguide. Therefore, the light emitting subsystem provided by the embodiment of the invention has the advantages of simple and compact structure, easy integration, and the like.
  • the optical signal transmitting subsystem provided by the embodiment of the present invention uses a light source by using a light source, and adds a frequency signal to the phase modulator to realize frequency shifting of the light source, thereby generating multi-frequency light, and filtering characteristics based on the micro-ring modulator.
  • the modulated signal is loaded on the monochromatic light obtained by the splitting by using the microring modulator to obtain optical signals of different frequencies, and is modulated by the download end of the microring modulator and the common waveguide pair.
  • the optical signal is combined and outputted, and the multi-light source system has a simpler structure, and the configuration is more flexible in an application scenario where the number of channels is variable.

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Abstract

一种基于多载波的光发射子系统及产生光信号的方法,光发射子系统包括:梳状光源装置(11),用于产生并输出复色光;微环组(12),包括多个微环调制器(34),所述多个微环调制器(34)均包括输入端和下载端,所述多个微环调制器(34)的输入端分别与所述梳状光源装置(11)相连,所述多个微环调制器(34)用于分别对所述复色光进行滤波和调制,得到不同频率的光信号,并通过各自的下载端输出;公共波导(13),与所述多个微环调制器(34)的下载端相连,用于对所述不同频率的光信号进行合波。通过微环组(12)对复色光进行滤波、调制,得到不同频率的光信号,并通过各自的下载端输出到公共波导(13),不仅能够将复色光进行分离,将调制信号加载到滤波得到的光载波上,得到不同频率的光信号,还能够通过将微环组(12)中微环调制器(34)的下载端与公共波导(13)相连,在公共波导(13)中将调制得到的不同频率的光信号进行合波,使得多载波的光发射子系统无需额外设置解复用器和波分复用器,简化了多载波的光发射子系统结构,有助于降低多载波的光发射子系统的成本。

Description

基于多载波的光发射子系统及产生光信号的方法
技术领域 本发明涉及光通信技术, 尤其涉及一种基于多载波的光发射子系统及产 生光信号的方法。
背景技术
随着光通信产业的发展, 光收发组件相关技术也在不断演进, 高速率、 低成本、 低功耗、 小型化的光组件逐渐成为行业关注的热点。
在光发送侧, 当前 40GE&100GE以及未来的 400GE等客户侧光收发组 件多釆用多通道并行的实现方式, 因此波分复用 ( Wavelength Division Multiplexing, WDM ) 光源结合光波分复用器合波输出是集成光发射组件的 必经之路。
产生 WDM光源的方法有多种,如直接釆用多通道不同波长光发射器件、 或者梳状光源也可作为 WDM光源等。
梳状光源基于环形反馈腔体设计, 其基本组成部分包括移频器、 带通滤 波器、 光放大器、 耦合器等, 实现输出梳状光语的复色光。 利用梳状光源输出的梳状光谱的复色光加载调制信号时, 梳状光源产生 的光先经过解复用器分路, 得到多个单一频率的光(即得到不同的单色光) 或光载波, 然后分别在不同的单色光上加载调制信号, 得到多个不同频率的 光信号, 再通过波分复用器将多个不同频率的光信号合波输出。 该方案在较 多通道应用场景中的优势明显, 但是对于通道数相对较少如 8通道、 10通道 等情况, 缺点较多, 如由于梳状光谱的光是通过反馈回路同时产生, 且利用 其作为光载波的过程中需要通过解复用器分路、 调制、 再通过波分复用器合 路, 实现过程较为繁瑣。
发明内容 有鉴于此, 本发明实施例提供一种基于多载波的光发射子系统及产生光 信号的方法, 以简化多载波的光发射子系统结构。
第一方面, 本发明实施例提供一种基于多载波的光发射子系统, 包括: 梳状光源装置, 用于产生并输出复色光; 微环组, 包括多个微环调制器, 所述多个微环调制器均包括输入端和下 载端, 所述多个微环调制器的输入端分别与所述梳状光源装置相连, 所述多 个微环调制器用于分别对所述复色光进行滤波和调制 , 得到不同频率的光信 号, 并通过各自的下载端输出; 公共波导, 与所述多个微环调制器的下载端相连, 用于对所述不同频率 的光信号进行合波。
结合第一方面, 在第一方面的第一种可能的实现方式中, 所述梳状光源 装置包括: 一个光源; 至少一个移频装置, 与所述光源相连, 用于对所述光源发出的光进行移 频, 得到复色光。
结合第一方面的第一种可能的实现方式, 在第一方面的第二种可能的实 现方式中, 当有一个所述移频装置时, 所述多个微环调制器均连接在第一波 导上, 所述第一波导与所述移频装置的输出端相连; 当有多个所述移频装置时, 所述微环组中微环调制器的数量等于或大于 所述移频装置的数量, 所述移频装置之间通过第二波导串联, 且距离所述光 源最远的移频装置的输出端与第三波导相连, 所述第三波导、 每个所述第二 波导上分别至少连接有一个所述微环组中的微环调制器。 结合第一方面的第一或第二种可能的实现方式, 在第一方面的第三种可 能的实现方式中, 所述移频装置为相位调制器, 加载有微波信号; 当所述移 频装置有多个时, 各个相位调制器加载的微波信号相同。 结合第一方面的第二种可能的实现方式, 在第一方面的第四种可能的实 现方式中, 当所述移频装置有多个时, 任意相邻的两个移频装置之间连接有 光放大器。 结合第一方面的第一至第三种可能的实现方式中任一种可能的实现方 式, 在第一方面的第五种可能的实现方式中, 所述公共波导有一个或多个; 当所述公共波导有一个时 , 所述多个微环调制器的下载端均与所述公共 波导相连; 当所述公共波导有多个时, 所述多个微环调制器分组为与所述公共波导 的数量相同的多个微环子组, 所述微环子组与所述公共波导——对应连接。 结合第一方面的第一至第五种可能的实现方式中任一种可能的实现方 式, 在第一方面的第六种可能的实现方式中, 还包括: 温控装置, 用于为所述梳状光源和所述微环组提供稳定的温度环境。 第二方面, 本发明实施例提供一种产生光信号的方法, 包括: 用一个光源产生并输出复色光; 釆用多个微环调制器分别对所述复色光进行滤波和调制, 得到不同频率 的光信号;
将所述不同频率的光信号中的多个光信号输出到一个公共波导上。
结合第二方面, 在第二方面的第一种可能实现的方式中, 用一个光源产 生并输出复色光, 包括:
釆用一个加载有微波信号的相位调制器对所述光源进行移频, 得到并输 出复色光;
或者, 釆用级联的多个加载有同一微波信号的相位调制器对所述光源进 行逐级移频, 得到多个复色光。
结合第二方面, 在第二方面的第二种可能实现的方式中, 将所述不同频 率的光信号中的多个光信号输出到一个公共波导上, 还包括:
将所述不同频率的光信号中除所述多个光信号以外的其余光信号输出到 至少一个公共波导上。
结合第二方面或其第一或第二种可能实现的方式, 在第二方面的第三种 可能实现的方式中, 还包括:
为所述光源和所述微环调制器提供稳定的温度环境。 上述实施例提供的基于多载波的光发射子系统及产生光信号的方法, 通 过微环组对复色光进行滤波、 调制, 得到不同频率的光信号, 并通过各自的 下载端输出到公共波导, 不仅能够将复色光进行分离, 将调制信号加载到滤 波得到的光载波上, 得到不同频率的光信号, 还能够通过将微环组中微环调 制器的下载端与公共波导相连, 在公共波导中将调制得到的不同频率的光信 号进行合波, 使得多载波的光发射子系统无需额外设置解复用器和波分复用 器, 简化了多载波的光发射子系统结构, 有助于降低多载波的光发射子系统 的成本。
附图说明 为了更清楚地说明本发明实施例中的技术方案, 下面将对实施例描述中 所需要使用的附图作简要介绍, 显而易见地, 下面描述中的附图仅仅是本发 明的一些实施例, 对于本领域的普通技术人员来讲, 在不付出创造性劳动性 的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明一个实施例提供的基于多载波的光发射子系统的示意图; 图 2为本发明另一实施例提供的产生光信号的方法的流程图;
图 3为本发明另一个实施例提供的基于多载波的光发射子系统的结构示 意图;
图 4为本发明另一个实施例提供的基于多载波的光发射子系统中微环调 制器波导组成示意图;
图 5为本发明另一个实施例提供的基于多载波的光发射子系统中微环调 制器与公共波导的连接示意图;
图 6为本发明另一个实施例提供的基于多载波的光发射子系统的结构示 意图。
具体实施方式 为了使本发明的目的、 技术方案和优点更加清楚, 下面将结合附图对本 发明作进一步地详细描述, 显然, 所描述的实施例仅仅是本发明一部份实施 例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在 没有做出创造性劳动前提下所获得的所有其它实施例, 都属于本发明保护的 范围。 图 1为本发明一个实施例提供的基于多载波的光发射子系统的示意图。 该系统包括: 梳状光源装置 11、 微环组 12和公共波导 13。 梳状光源装置 11用于产生并输出复色光, 如梳状光语的光。 微环组 12包括多个微环调制器,所述多个微环调制器均包括输入端和下 载端, 所述多个微环调制器的输入端分别与所述梳状光源装置相连, 所述多 个微环调制器用于分别对所述复色光进行滤波和调制 , 得到不同频率的光信 号, 并通过各自的下载端输出。
例如, 微环组 12包括 5个微环调制器, 那么每个微环调制解调器响应一 个单色光或者一个频率的光。假设梳状光源装置 11产生的复色光包括频率为 fl的光(以下简称为光 fl )、 频率为 f2的光(以下简称为光 )、 频率为 β 的光(以下简称为光 β )、 频率为 f4的光(以下简称为光 f4 )及频率为 f5的 光(以下简称为光 f5 ), 那么微环组 12中有不同的微环调制器分别响应这五 个单色光。 如微环组 12中有微环调制器 Wl、 微环调制器 W2、 微环调制器 W3、 微环调制器 W4、 微环调制器 W5, 那么, 微环调制器 W1响应光 fl , 微环调制器 W2响应光 , 微环调制器 W3响应光 β , 微环调制器 W4响应 光 f4, 微环调制器 W5响应光 f5。 其中, 响应一个频率的光, 意味着滤除该 光以外的自由光谱范围以内的其他所有频率的光, 并用响应的该频率的光作 为光载波, 用来加载调制信号即进行调制得到该频率的光信号。 例如, 微环 调制器 W1响应光 fl , 即, 滤除光 fl以外的自由光语范围以内的其他频率的 光, 并用光 fl加载调制信号, 得到频率为 fl的光信号。 类似的, 微环调制器 W2输出频率为 的光信号, 微环调制器 W3输出频率为 β的光信号, 微环 调制器 W4输出频率为 f4的光信号 ,微环调制器 W5输出频率为 f5的光信号。 各微环调制器均通过各自的下载端输出光信号。 多个微环调制器分别响应一 个频率的光, 不仅能将复色光进行分离, 还能够将调制信号加载到滤波得到 的光载波上, 得到光信号, 避免了解复用器的使用, 简化了多载波的光发射 子系统的结构, 有助于降低多载波的光发射子系统的成本, 使得光信号的产 生更加简便、 高效。 公共波导 13与所述多个微环调制器的下载端相连,用于对所述不同频率 的光信号中的部分或全部光信号进行合波。 例如, 上述有微环调制器 Wl、微 环调制器 W2、 微环调制器 W3、 微环调制器 W4、 微环调制器 W5的下载端 均与公共波导 13相连, 那么公共波导 13中将至少有 fl、 f2、 β、 f4、 f5五种 频率的光信号混合在一起, 即实现合波。 避免了波分复用器的使用, 进一步 简化了多载波的光发射子系统的结构, 有助于降低多载波的光发射子系统的 成本, 使得光信号的产生更加简便、 高效。 进一步, 公共波导 13可有一个或多个, 也即多载波的光发射子系统的输 出可以有一路或多路, 每路通过一个公共波导输出。 例如, 当公共波导 13有一个时, 微环组 12中的所有微环调制器的下载 端均与公共波导 13相连。 当公共波导 13有多个时, 微环组 12中的所有微环调制器分组为与公共 波导 13的数量相同的多个微环子组,微环子组与公共波导 13——对应连接。 仍以微环调制器 Wl、 微环调制器 W2、 微环调制器 W3、 微环调制器 W4、 微环调制器 W5为例, 假设公共波导 13有两个, 那么微环调制器 Wl、 微环 调制器 W2、 微环调制器 W3、 微环调制器 W4、 微环调制器 W5分为两个微 环子组 Gl、 G2, 其中, 微环子组 G1包括微环调制器 Wl、 微环调制器 W2, 微环子组 G2包括微环调制器 W3、 微环调制器 W4、 微环调制器 W5, 微环 子组 G1中的微环调制器 Wl、微环调制器 W2的下载端均与其中一个公共波 导 13相连, 实现 fl、 f2的光信号的合波, 微环子组 G2中的微环调制器 W3、 微环调制器 W4、 微环调制器 W5的下载端均与另一个公共波导 13相连, 实 现β、 f4、 f5的光信号的合波。 进一步, 梳状光源装置可包括: 一个光源和至少一个移频装置, 该至少 一个移频装置与该光源相连, 用于对该光源发出的光进行移频, 得到复色光。 使得多载波的光发射子系统无需反馈回路也能够产生复色光, 更进一步简化 了多载波的光发射子系统的结构,有助于降低多载波的光发射子系统的成本, 使得光信号的产生更加简便、 高效。
例如, 当有一个移频装置时, 微环组 12中的微环调制器均连接在第一波 导上, 该第一波导与移频装置的输出端相连。 当有多个移频装置时,微环组 12中微环调制器的数量等于或大于所述移 频装置的数量, 移频装置之间通过第二波导串联, 且距离上述光源最远的移 频装置的输出端与第三波导相连, 该第三波导、 每个第二波导上分别至少连 接有一个微环组 12中的微环调制器。 这样, 对于通道数较多或者载波较多的 光发射子系统, 通过多个相位调制器, 仍然能够为提供满足要求的复色光, 以供更多的微环调制器使用。 上述移频装置可为移频器, 也可为相位调制器。 当移频装置为相位调制 器时, 加载有微波信号, 当所述移频装置有多个时, 各个相位调制器加载的 微波信号相同。 进一步, 当上述移频装置有多个时, 任意相邻的两个移频装置之间可连 接有光放大器, 以保证复色光有足够的能量向后传递。 进一步, 本发明实施例提供的基于多载波的光发射子系统还可包括: 温控装置, 用于为上述梳状光源装置和微环组提供稳定的温度环境。 例 如光源和微环组可以釆用公共温控系统, 实现波长的相对锁定, 以保证复色 光以及微环调制器响应的光频率相对稳定。 上述实施例提供的多载波的光发射子系统, 通过微环组对复色光进行滤 波、 调制, 得到不同频率的光信号, 并通过各自的下载端输出到公共波导, 不仅能够将复色光进行分离, 将调制信号加载到滤波得到的光载波上, 得到 不同频率的光信号, 还能够通过将微环组中微环调制器的下载端与公共波导 相连, 在公共波导中将调制得到的不同频率的光信号进行合波, 使得多载波 的光发射子系统无需额外设置解复用器和波分复用器, 简化了多载波的光发 射子系统结构, 有助于降^^多载波的光发射子系统的成本。 对于通道数较少的光互连场景, 釆用上述实施例提供的技术方案可以逐 级对种子光源移频产生多波长光源, 再通过滤波器滤出单一波长加载调制信 号, 再对加载信号的多个通道波分复用输出, 将大为简化多载波的光发射组 件的内部结构, 应用方式也更为灵活。 图 2为本发明另一实施例提供的产生光信号的方法的流程图。 本实施例 所示的方法可通过图 1所示的系统实现, 包括: 步骤 21、 用一个光源产生并输出复色光, 如产生并输出梳状光语的光。 步骤 22、 釆用多个微环调制器分别对上述复色光进行滤波和调制, 得到 不同频率的光信号。 例如, 多个微环调制器分别响应一个频率的光, 不仅能 将复色光进行分离, 还能够将调制信号加载到滤波得到的光载波上, 得到光 信号, 避免了解复用器的使用, 简化了多载波的光发射子系统的结构, 有助 于降低多载波的光发射子系统的成本, 使得光信号的产生更加简便、 高效。 步骤 23、 将上述不同频率的光信号中的多个光信号输出到一个公共波导 上。 例如将步骤 22中产生的光信号部分或全部输出到一个公共波导, 这些光 信号在公共波导中混合, 实现合波, 避免了波分复用器的使用, 进一步简化 了多载波的光发射子系统的结构,有助于降低多载波的光发射子系统的成本, 使得光信号的产生更加简便、 高效。 进一步, 用一个光源产生并输出复色光, 可包括:
釆用一个加载有微波信号的相位调制器对上述光源进行移频, 得到并输 出复色光, 使得多载波的光发射子系统无需反馈回路也能够产生复色光, 更 进一步简化了多载波的光发射子系统的结构, 有助于降低多载波的光发射子 系统的成本, 使得光信号的产生更加简便、 高效。 或者, 用一个光源产生并输出复色光, 可包括: 釆用串联的多个加载有同一微波信号的相位调制器对上述光源进行逐级 移频, 得到多个复色光。 这样, 对于通道数较多或者载波较多的光发射子系 统, 通过多个相位调制器, 仍然能够为提供满足要求的复色光, 以供更多的 微环调制器使用。 进一步, 将上述不同频率的光信号中的多个光信号输出到一个公共波导 上, 还可包括: 将上述不同频率的光信号中除所述多个光信号以外的其余光信号输出到 至少一个公共波导上。 例如当多载波的光发射子系统有多路输出时, 即公共 波导有多个时, 多个微环调制器可以分别输出光信号到一个公共波导上, 具 体可见上述系统实施例中的说明。 进一步, 本发明实施例提供的产生光信号的方法还可包括: 为上述光源和微环调制器提供稳定的温度环境, 以保证复色光以及微环 调制器响应的光频率相对稳定。 上述实施例提供的产生光信号的方法, 通过多个调制器对复色光进行滤 波、 调制, 得到不同频率的光信号, 并通过各自的下载端输出到公共波导, 不仅能够将复色光进行分离, 将调制信号加载到滤波得到的光载波上, 得到 不同频率的光信号, 还能够通过微环调制器的下载端与公共波导相连, 在公 共波导中将调制得到的不同频率的光信号进行合波, 使得多载波的光发射子 系统无需额外设置解复用器和波分复用器, 简化了多载波的光发射子系统结 构, 有助于降低多载波的光发射子系统的成本。 对于通道数较少的光互连场景, 釆用上述实施例提供的技术方案可以逐 级对种子光源移频产生多波长光源, 再通过滤波器滤出单一波长加载调制信 号, 再对加载信号的多个通道波分复用输出, 将大为简化多载波的光发射组 件的内部结构, 应用方式也更为灵活。 图 3为本发明另一个实施例提供的基于多载波的光发射子系统的结构示 意图。 本实施例与图 1所示的实施例类似, 不同之处在于, 本实施例中梳状 光源装置包括一个光源和多个移频装置, 且移频装置为相位调制器, 每个相 位调制器加载有相同的微波信号。 图 3中示出了两个相位调制器和两个微环调制器,两个相位调制器级联, 且加载了同一微波信号, 每个相位调制器连接有一个微环调制器。 光源 31产生中心频率为 fQ的光信号, 注入到第一个相位调制器 32后, 外部微波信号源对第一个相位调制器 32的两臂分别加载信号 Vmsin ( 2n ) 和 Vmcos ( 2n ), 调节第一个相位调制器 32的工作点, 将产生频率为 士 nfs ( n=l,2,3 - ) 的复色光, 即产生了频移现象, 并且如图 3所示, 随着 n 的增大, 相应频率的光的幅度逐渐降低, fQ和 相对幅度也受到相位 调制器工作点的限制。 以第一个通道上的光信号的产生过程为例, 频移后得到的复色光沿着波 导 38 (即上述第二波导)传输, 并经由耦合波导 33耦合后进入第一个微环 调制器 34的直波导, 进而耦合进入环形波导。 由于微环型调制器具有一定的 滤波特性, 仅响应特定范围的频率(如第一个微环调制器 34仅响应梳状光语 中频率为 的光), 因此微环调制器 34兼具滤波和调制功能, 即, 对响 应的频率为 的光或者说滤波得到的频率为 f^fo+f 的光加载待传输的 信号, 得到特定频率的光信号。 其中, 待传输的信号来自第一信号源。 该特 定频率的光信号从微环调制器 34 的下载端输出 (即第一个通道输出频率为 fffo+f 的调制光信号)。 以此类推,第一个相位调制器 32输出频移后的梳状光语的复色光进入第 二个相位调制器 35, 由于第二个相位调制器 35与第一个相位调制器 32从同 一个的微波信号源加载了相同的微波信号, 因此产生的频移作用类似。 通过 控制第二个相位调制器 37的工作点, 频率为 f2=f。± 2fs的光幅度增大, 输出 的梳状光语的复色光经由第二个微环调制器 37后,频率为 f2=f。+2fs的光被滤 出, 并被加载第二信号源给出的信号, 得到频率为 f2=f。+2fs的光信号。 该频 率为 f2=f。+2fs的光信号从第二通道输出。 其中, 第二个微环调制器 37连接在 波导 39 (即上述第三波导 )上, 通过耦合波导 36得到第二个相位调制器 35 输出的复色光。
根据实际应用场景对 WDM通道数的需要, 可以继续配置第三、 第四级 通道等等甚至更多通道。 相应地, 可以继续配置第三、 四个相位调制器, 以 及第三、 四个微环调制器, 等等甚至更多的微环调制器。 相位调制器可等于 或者少于通道的数量, 微环调制器的数量等于通道的数量, 其连接方式与图 3 类似。 当相位调制器的数量少于通道数时, 其中, 一个相位调制器的输出 端连接的波导上可连接两个或更多的微环调制器。 其中, 光放大器 310为备选器件, 连接在两个相位调制器之间。 由于经 过多个耦合波导耦合之后, 在波导上传输的复色光的光功率有一定的损失, 该光放大器 310可以用于提升梳状光语的复色光的光功率。 其中, 微环调制器 34、 微环调制器 337等微环调制器的波导组成可以如 图 4所示, 包含直波导 41、 直波导 42和环形波导 43 , 直波导 41的一端为输 入端 (即端口 1 ), 另一端为直通端 (即端口 2 ), 直波导 42的一端为上载端 (即端口 3 ), 另一端为下载端 (即端口 4 )。 各微环调制器调制得到光信号后, 通过下载端将调制得到的光信号输出 到通道。 各个通道中的光信号通过公共波导合波输出, 如图 5所示, 第一个 微环调制器的下载端通过通道 1与公共波导 51相连,第二个微环调制器的下 载端通过通道 2与公共波导 51相连, 以此类推, 第 N个微环调制器的下载 端通过通道 N与公共波导 51相连, 这样, 不同频率的光信号通过此公共波 导 51合波输出, 无需额外引入光波分复用器件, 简化了多载波的光发射子系 统的结构, 有助于降低成本。 另外, 参见图 5微环调制器的直通端可以作为光电监控的端口, 即外界 监控光电探测器, 实时监测经由微环调制器的光信号参数。 图 6为本发明另一个实施例提供的基于多载波的光发射子系统的结构示 意图。 本实施例与图 3所示实施例类似, 通过调节相位调制器的工作点, 可 以控制中心频率与旁瓣之间的相对强度, 不同之处在于, 本实施例中移频装 置有一个, 适用于通道数更少的应用场景。
图 6中, 光源 61经过相位调制器 62移频后产生梳状光语的复色光, 即 频率为 f尸 f0 ± nfs ( n=l,2,3 - ) 的复色光。
微环组包括 N个微环调制器: 微环调制器 631、 微环调制器 632、 …微 环调制器 63N, 分别对梳状光语的复色光进行滤波、 调制, 将 N个不同的调 制信号加载到该复色光中不同频率的光上, 然后, 通过 N个通道: 通道 1、 通道 2、 …通道 N输出到公共波导(具体详见图 5 ), 实现合波输出。 其中, N个不同的调制信号来自于 N个信号源: 信号源 1、 信号源 2、 …信号源N。 进一步, 也可对微环调制器中的光进行监控, 监控方式同图 3所示实施 例中的说明, 不再赘述。 本发明上述实施例, 通过对相位调制器的双臂加载由微波信号源提供点 频信号, 实现对光源的频移, 从而产生多载波输出即梳状光谱的复色光, 再 经由微环调制器对频移得到的复色光进行滤波和调制 , 得到不同频率的光信 号, 并利用微环调制器的特性, 将微环调制器的下载端均连接到公共波导, 实现不同频率的光信号的合波, 达到了省略解复用器、 波分复用器件等器件 也能实现多通道调制光信号合波输出的目的, 简化了基于多载波的光发射子 系统的结构, 有助于降低光发射子系统的成本, 提高了产生光信号的效率。
上述实施例较适用于通道数较少的 WDM光发射场景, 由于引入了用于 实现滤波、 调制的微环调制器, 且通过将其下载端连接到公共波导实现合波, 因此, 本发明实施例提供的光发射子系统具有结构简单紧凑、 易于集成等优 势。 另外, 本发明实施例提供的光信号发射子系统通过釆用一个光源, 并对 相位调制器外加点频信号实现对该光源的移频, 产生多频率的光, 基于微环 调制器的滤波特性实现多频率的光的分路, 利用微环调制器在分路得到的单 色光上加载调制信号, 得到不同频率的光信号, 并通过微环调制器的下载端 和公共波导对调制得到的光信号进行合波输出, 对比多光源系统, 具有结构 更为简单, 在满足通道数可变的应用场景下, 配置也更为灵活等优点。 最后应说明的是: 以上各实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述各实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分或者全部技术特征进行等同替换; 而这些修改或者替换, 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要求
1、 一种基于多载波的光发射子系统, 其特征在于, 包括: 梳状光源装置, 用于产生并输出复色光; 微环组, 包括多个微环调制器, 所述多个微环调制器均包括输入端和下 载端, 所述多个微环调制器的输入端分别与所述梳状光源装置相连, 所述多 个微环调制器用于分别对所述复色光进行滤波和调制 , 得到不同频率的光信 号, 并通过各自的下载端输出; 公共波导, 与所述多个微环调制器的下载端相连, 用于对所述不同频率 的光信号进行合波。
2、 根据权利要求 1所述系统, 其特征在于, 所述梳状光源装置包括: 一个光源; 至少一个移频装置, 与所述光源相连, 用于对所述光源发出的光进行移 频, 得到复色光。
3、 根据权利要求 2所述系统, 其特征在于, 当有一个所述移频装置时, 所述多个微环调制器均连接在第一波导上, 所述第一波导与所述移频装置的 输出端相连; 当有多个所述移频装置时, 所述微环组中微环调制器的数量等于或大于 所述移频装置的数量, 所述移频装置之间通过第二波导串联, 且距离所述光 源最远的移频装置的输出端与第三波导相连, 所述第三波导、 每个所述第二 波导上分别至少连接有一个所述微环组中的微环调制器。
4、 根据权利要求 2或 3所述系统, 其特征在于, 所述移频装置为相位调 制器, 加载有微波信号; 当所述移频装置有多个时, 各个相位调制器加载的 微波信号相同。
5、 根据权利要求 3所述系统, 其特征在于, 当所述移频装置有多个时, 任意相邻的两个移频装置之间连接有光放大器。
6、 根据权利要求 2-4任一项所述系统, 其特征在于, 所述公共波导有一 个或多个; 当所述公共波导有一个时, 所述多个微环调制器的下载端均与所述公共 波导相连; 当所述公共波导有多个时, 所述多个微环调制器分组为与所述公共波导 的数量相同的多个微环子组, 所述微环子组与所述公共波导——对应连接。
7、 根据权利要求 2-6任一项所述系统, 其特征在于, 还包括: 温控装置, 用于为所述梳状光源和所述微环组提供稳定的温度环境。
8、 一种产生光信号的方法, 其特征在于, 包括: 用一个光源产生并输出复色光; 釆用多个微环调制器分别对所述复色光进行滤波和调制, 得到不同频率 的光信号;
将所述不同频率的光信号中的多个光信号输出到一个公共波导上。
9、 根据权利要求 8所述方法, 其特征在于, 用一个光源产生并输出复色 光, 包括:
釆用一个加载有微波信号的相位调制器对所述光源进行移频, 得到并输 出复色光;
或者, 釆用级联的多个加载有同一微波信号的相位调制器对所述光源进 行逐级移频, 得到多个复色光。
10、 根据权利要求 8或 9所述方法, 其特征在于, 将所述不同频率的光 信号中的多个光信号输出到一个公共波导上, 还包括:
将所述不同频率的光信号中除所述多个光信号以外的其余光信号输出到 至少一个公共波导上。
11、 根据权利要求 8-10任一项所述方法, 其特征在于, 还包括: 为所述光源和所述微环调制器提供稳定的温度环境。
PCT/CN2013/074142 2013-04-12 2013-04-12 基于多载波的光发射子系统及产生光信号的方法 WO2014166108A1 (zh)

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