WO2021016966A1 - 一种多波长光源以及光芯片 - Google Patents

一种多波长光源以及光芯片 Download PDF

Info

Publication number
WO2021016966A1
WO2021016966A1 PCT/CN2019/098745 CN2019098745W WO2021016966A1 WO 2021016966 A1 WO2021016966 A1 WO 2021016966A1 CN 2019098745 W CN2019098745 W CN 2019098745W WO 2021016966 A1 WO2021016966 A1 WO 2021016966A1
Authority
WO
WIPO (PCT)
Prior art keywords
wavelength
optical
light source
demultiplexer
optical signal
Prior art date
Application number
PCT/CN2019/098745
Other languages
English (en)
French (fr)
Inventor
陈宏民
吴双元
武林
廖蓝田
徐晓庚
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980096584.8A priority Critical patent/CN113853755B/zh
Priority to PCT/CN2019/098745 priority patent/WO2021016966A1/zh
Publication of WO2021016966A1 publication Critical patent/WO2021016966A1/zh
Priority to US17/587,553 priority patent/US11990987B2/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0221—Power control, e.g. to keep the total optical power constant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/505—Laser transmitters using external modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/506—Multiwavelength transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/564—Power control

Definitions

  • This application relates to the field of optical communication technology, and in particular to a multi-wavelength light source and an optical chip.
  • the transmitting end individually modulates and encodes each wavelength, and there is a guard interval (gap) between adjacent wavelengths, and the receiving end processes the signal of each wavelength separately , Resulting in a significant drop in spectrum efficiency (SE) and a greatly shortened transmission distance.
  • SE spectrum efficiency
  • ODSP optical digital signal processor
  • frequency Multi-wavelength light source with stable bias characteristics, correlated phase characteristics, and high output power.
  • This application provides a multi-wavelength light source and an optical chip to improve the performance of a wavelength division multiplexing communication system.
  • the present application provides a multi-wavelength light source.
  • the multi-wavelength light source includes: a laser for generating a first optical signal; an optical modulator for modulating the first optical signal generated by the laser to generate a second optical signal;
  • Optical signal the second optical signal includes at least two wavelength components;
  • an optical mixer is used for mixing based on at least two wavelength components in the second optical signal to generate a third optical signal, the third optical signal includes at least four Wavelength components; demultiplexer, used to separate at least four wavelength components in the third optical signal from the third optical signal; optical power adjuster, used to adjust the demultiplexer according to the set power threshold The power of at least four wavelength components obtained by separation by the device.
  • the multi-wavelength light source can generate multi-wavelength optical signals with stable phase relationship and relative frequency deviation and higher power through the structure of laser, optical modulator and optical mixer, and the modulation amplitude of the optical modulator is small.
  • the generated optical signal power difference is small, so that the difference of the multi-wavelength light source is small, and the performance of the wavelength division multiplexing communication system can be improved.
  • the laser includes but is limited to any one of an external cavity laser ECL, a distributed Bragg reflector DBR laser, a distributed feedback laser DFB, or a quantum well QW semiconductor laser.
  • the light modulator may be a Mach-Zehnder modulator MZM.
  • the optical mixer can be a four-wave mixing semiconductor optical amplifier FWM SOA.
  • the FWM SOA can not only generate more wavelength components through mixing, but also amplify the generated third wave containing these wavelength components.
  • the optical signal is beneficial to increase the power of the optical signal finally output by the multi-wavelength light source, and the power difference between the wavelength components in the third signal is small, which is beneficial to the optical power adjuster to perform power equalization.
  • the optical power adjuster is specifically used to: when the power of the wavelength component separated by the demultiplexer is greater than the set power threshold, reduce the power of the wavelength component separated by the demultiplexer; When the power of the wavelength component separated by the demultiplexer is less than the set power threshold, the power of the wavelength component separated by the demultiplexer is increased.
  • the optical power adjuster includes at least four semiconductor optical amplifier SOAs, and the at least four SOAs are in one-to-one correspondence with at least four wavelength components separated by the demultiplexer. At least four SOAs are used to adjust the power of their respective wavelength components. SOA can amplify the power of the wavelength component, thereby reducing the loss of the wavelength component in the power adjustment process, and increasing the power of the adjusted wavelength component.
  • the multi-wavelength light source may further include a wavelength locker, which is used to stabilize the wavelength of the first optical signal generated by the laser, and the wavelength locker may be selected from lasers, modulators, optical mixers, and demultiplexers. Either one of the user and the optical power adjuster performs light splitting, and controls the laser to adjust the wavelength of the first optical signal according to the wavelength of the obtained optical signal and the wavelength of the split optical signal obtained from the first optical signal set according to actual requirements.
  • the wavelength locker can be coupled with the laser and the demultiplexer respectively to detect the wavelength of any one of the at least four wavelength components separated by the demultiplexer.
  • the laser is controlled to adjust the wavelength of the first optical signal.
  • the multi-wavelength light source further includes a driving circuit, which is coupled to the optical modulator and used to output a driving signal to the modulator; the optical modulator is specifically used to: use the driving signal output by the driving circuit to The optical signal is modulated to obtain a second optical signal; wherein the second optical signal includes a first wavelength component and a second wavelength component, the frequency of the first wavelength component is f0+fm, and the frequency of the second wavelength component is f0-fm, f0 is the frequency of the first optical signal, and fm is the frequency of the driving signal.
  • the driving circuit is coupled with the optical modulator through an inductive wire (that is, the impedance of the wire is inductive), and when the frequency of the driving signal is fm, the conversion efficiency of the optical modulator is maximum.
  • the inductive wire can be realized by a wire bond process.
  • the impedance of the optical modulator is capacitive, the inductive wire and the impedance of the optical modulator can be used to form an LC resonant circuit, so that the LC resonant circuit resonates at the frequency fm, thereby maximizing the conversion efficiency of the optical modulator, which can be realized in When the input signal amplitude is constant, higher output power is obtained, and the power of the driving signal is reduced.
  • the material of the optical waveguide in the demultiplexer is silicon nitride SiNx, or silicon Si, or silicon dioxide SiO2 to expand the tuning range through the vernier effect, so that the demultiplexer can separate optical signals
  • the corresponding band is adjustable within a certain range.
  • the optical power adjuster is flip-chip coupled to the demultiplexer, and the flip-chip coupling method can improve the coupling efficiency and reduce the size of the multi-wavelength light source.
  • the wavelength locker and the demultiplexer are integrated in the first chip. Since the wavelength locker and the demultiplexer can use the same optical waveguide material, it is easier to achieve monolithic integration and reduce processing complexity.
  • the laser, the optical modulator and the optical mixer are integrated in the second chip, so that the structure of the multi-wavelength light source is compact.
  • the second chip can be monolithically integrated by mixing heterogeneous materials, or monolithically integrated by homogenous materials (such as indium phosphide InP).
  • the laser, the optical modulator, the optical mixer, and the optical power adjuster are integrated in the second chip, so that the structure of the multi-wavelength light source is compact.
  • the multi-length light source includes a first chip and a second chip, and the entire multi-length light source has a compact structure, a small volume, and a low cost.
  • the second chip is coupled with the demultiplexer 304 through a spatial coupling manner or an evanescent wave coupling manner.
  • the optical mixer in the second chip is coupled to the demultiplexer through a spatial coupling mode or an evanescent wave coupling mode;
  • the optical mixer and optical power adjuster in the second chip use spatial coupling or evanescent wave coupling. Coupled with demultiplexer.
  • the optical in the second chip when the second chip is coupled with the demultiplexer through spatial coupling, the optical in the second chip
  • the mixer can be specifically coupled with the demultiplexer through a lens.
  • the optical mixer and optical power adjuster in the second chip can be specifically coupled with the demultiplexer through a lens .
  • the laser, the optical modulator, the optical mixer, the demultiplexer, the optical power adjuster, and the wavelength locker are integrated in the third chip, that is, the components in the multi-wavelength light source are integrated.
  • the present application also provides an optical chip, which includes the multi-wavelength light source described in any one of the possible implementation manners of the first aspect.
  • any of the optical chips provided above includes the multi-wavelength light source described in the first aspect. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding multi-wavelength light source provided in the first aspect. , I won’t repeat it here.
  • Fig. 1 is a schematic structural diagram of a multi-wavelength light source in the prior art
  • FIG. 2 is a schematic diagram of another multi-wavelength light source structure in the prior art
  • FIG. 3 is one of the structural schematic diagrams of a multi-wavelength light source provided by an embodiment of the application.
  • FIG. 4 is a second structural diagram of a multi-wavelength light source provided by an embodiment of this application.
  • FIG. 5 is the third structural diagram of a multi-wavelength light source provided by an embodiment of the application.
  • FIG. 6 is a schematic diagram of the connection between a driving circuit and an optical modulator in a multi-wavelength light source provided by an embodiment of the application;
  • FIG. 7 is the third structural diagram of a multi-wavelength light source provided by an embodiment of this application.
  • FIG. 8 is the fourth structural diagram of a multi-wavelength light source provided by an embodiment of the application.
  • FIG. 9 is a fifth structural diagram of a multi-wavelength light source provided by an embodiment of this application.
  • a multi-wavelength light source (taking a four-wavelength light source as an example) is mainly implemented in the following two ways:
  • Multi-wavelength is realized by cascading Mach-Zehnder modulator (MZM).
  • MZM Mach-Zehnder modulator
  • the multi-wavelength light source consists of a wavelength locker (locker) 101, a laser (laser) 102, two cascaded MZM 103 and MZM 104, a clock system 105, a driver 106 and a driver 107, and a phase shifter 108
  • WSS wavelength select switch
  • the wavelength locker 101 is used to stabilize the wavelength of the optical signal generated by the laser 102; the laser 102 usually uses a commercial laser for generating optical signals; the clock system 105 usually uses a high-precision clock instrument to generate a clock signal for controlling the laser 102 The wavelength interval of the optical signal emitted; the driver 106 and the driver 107 are used to amplify the clock signal generated by the clock system 105; the phase shifter 108 is used to adjust the phase of the clock signal amplified by the driver 107, so that the MZM 104 can generate more Multi-wavelength optical carrier signal and flat output power of MZM 104; MZM 103, used to modulate the optical signal generated by laser 102 based on the clock signal amplified by driver 106; MZM 104, used to output signal based on phase shifter 108 , Modulate the optical signal output by the MZM 103; WSS 109 is used to decompose the optical signal output by the MZM 104 into multiple optical carrier signals, and
  • each level of MZM will produce DC difference loss and modulation difference loss at the same time, and WSS will level the optical power through attenuation.
  • WSS will level the optical power through attenuation.
  • there is about 7-20db difference loss which in turn leads to low conversion efficiency of the above-mentioned multi-wavelength light source, making the final
  • the power of the multiple output optical carrier signals is very low, which cannot meet the power budget, which makes it impossible to receive the receiving sensitivity requirements of the receiving end when the optical carrier signals generated by the above-mentioned multi-wavelength light source are used for data transmission.
  • the second way is to realize a multi-wavelength light source by sharing a wavelength locker with 4 independent light sources, where the wavelength locker is used to control the relative frequency deviation of the optical carrier generated by each light source.
  • the multi-wavelength light source includes four independent lasers 201-laser 204, and lasers 201-laser 204 share a wavelength locker 205.
  • phase noises of the four lasers, laser 201-laser 204 are distributed independently and have no correlation, which in turn leads to the degradation of the performance of the wavelength division multiplexing communication system, and the control accuracy of the relative frequency deviation of the optical carrier generated by each light source is low. .
  • this application provides a multi-wavelength light source and an optical chip to improve the performance of the wavelength division multiplexing communication system.
  • the multi-wavelength light source includes a laser 301, an optical modulator 302, an optical mixer 303, and an optical demultiplexer that are coupled in sequence.
  • User 304 and optical power adjuster 305 are coupled in sequence.
  • the laser 301 is used to generate the first optical signal.
  • the laser 301 includes but is limited to an external cavity laser (ECL), a distributed Bragg reflector (DBR) laser, a distributed feedback laser (DFB) or a quantum well (quantum well, QW) Any of semiconductor lasers.
  • ECL external cavity laser
  • DBR distributed Bragg reflector
  • DFB distributed feedback laser
  • QW quantum well
  • the optical modulator 302 is configured to modulate the first optical signal generated by the laser 301 to generate a second optical signal; wherein the second optical signal includes at least two wavelength components.
  • the light modulator 302 may be a Mach-Zehnder modulator MZM.
  • the optical mixer 303 is configured to perform mixing based on at least two wavelength components in the second optical signal to generate a third optical signal, and the third optical signal includes at least four wavelength components.
  • the optical mixer 303 can be a four-wavelength mixing (FWM) semiconductor optical amplifier (SOA).
  • the FWM SOA can not only generate the third optical signal, but also amplify the third optical signal. It is beneficial to increase the power of the optical signal finally output by the multi-wavelength light source, and the power difference between the wavelength components in the third signal is small, which is beneficial to the optical power adjuster 305 to perform power equalization.
  • a demultiplexer (demux) 304 is used to separate at least four wavelength components in the third optical signal from the third optical signal.
  • the optical power adjuster 305 is configured to adjust the power of at least four wavelength components separated by the demultiplexer 304 according to the set power threshold.
  • the optical power adjuster 305 is specifically configured to: when the power of the wavelength component separated by the demultiplexer 304 is greater than a set threshold, reduce the power of the wavelength component separated by the demultiplexer 304; When the power of the wavelength component separated by the filter 304 is less than the set threshold, the power of the wavelength component separated by the demultiplexer 304 is increased, so that the difference between the power of the adjusted wavelength component and the set power threshold is within the set threshold. Within the error range, that is, the power of at least four wavelength components after adjustment is equal or approximately equal.
  • the multi-wavelength light source may also include a wavelength locker, which is used to stabilize the wavelength of the first optical signal generated by the laser 301, and the wavelength locker may include the laser 301, the modulator 302, the optical mixer 303, and the demultiplexer.
  • the user 304 and the optical power adjuster 305 perform optical splitting, and control the laser 301 to split the first optical signal according to the wavelength of the obtained optical signal and the wavelength of the optical signal obtained by the first optical signal set according to actual needs.
  • the wavelength is stable within the set range.
  • the wavelength locker and demultiplexer can use the same optical waveguide material, and the wavelength locker and demultiplexer are relatively easy to achieve monolithic integration. Therefore, the wavelength locker usually splits light from the demultiplexer.
  • the wavelength locker 306 is respectively coupled with the laser 301 and the demultiplexer 304 to detect the wavelength of any one of the at least four wavelength components separated by the demultiplexer 304, When the wavelength of the detected wavelength component exceeds the set wavelength range, the laser 301 is controlled to adjust the wavelength of the first optical signal.
  • the wavelength locker 306 integrates a photodetector (PD) and a variable optical attenuator (VOA) at the same time, so as to achieve precise closed-loop locking of the wavelength of the optical signal.
  • PD photodetector
  • VOA variable optical attenuator
  • the multi-wavelength light source further includes a driving circuit 307, which is coupled with the optical modulator 302, and is used to output a driving signal to the modulator 302; the optical modulator 302 is specifically used for: using the driving circuit
  • the drive signal output by 307 modulates the first optical signal to obtain a second optical signal; wherein, the second optical signal includes a first wavelength component and a second wavelength component, the frequency of the first wavelength component is f0+fm, and the second wavelength
  • the frequency of the component is f0-fm
  • f0 is the frequency of the first optical signal
  • fm is the frequency of the drive signal.
  • the driving circuit 307 is coupled with the optical modulator through an inductive wire (that is, the impedance of the wire is inductive), and when the frequency of the driving signal is fm, the conversion efficiency of the optical modulator 302 is maximum.
  • the inductive wire can be realized by a wire bond process. Since the impedance of the optical modulator 302 is capacitive, the inductive wire and the impedance of the optical modulator 302 can form an LC resonant circuit, so that the LC resonant circuit resonates at the frequency fm, thereby maximizing the conversion efficiency of the optical modulator 302. It can achieve higher output power when the input signal amplitude is constant, and reduce the power of the drive signal.
  • the laser 301 generates a first optical signal, the wavelength of the first optical signal is ⁇ 0, and the frequency of the first optical signal is f0; the modulator 302 uses the driving signal provided by the driving circuit 307 to modulate the second optical signal obtained by modulating the first optical signal.
  • the second optical signal includes a first wavelength component with a wavelength of ⁇ 21 and a second wavelength component with a wavelength of ⁇ 22, wherein the frequency of the first wavelength component is f0+fm, and the frequency of the second wavelength component is f0-fm;
  • the optical mixer 303 mixes to obtain a third optical signal including a third wavelength component with a wavelength of ⁇ 21, a fourth wavelength component with a wavelength of ⁇ 22, a fifth wavelength component with a wavelength of ⁇ 31, and a sixth wavelength component with a wavelength of ⁇ 32,
  • the frequency of the third wavelength component is f0+fm
  • the frequency of the fourth wavelength component is f0-fm
  • the frequency of the fifth wavelength component is f0+3fm
  • the frequency of the sixth wavelength component is f0-3fm
  • the demultiplexer 304 will The four wavelength components are separated from the third optical signal;
  • the optical power adjuster 305 adjusts the power of the four wavelength components obtained by the demultiplexer 304, and the
  • the demultiplexer 304 can be implemented by a multi-channel tunable bandpass filter to filter out the interference wavelength components in the third signal generated by the optical mixer 303 to obtain useful wavelength components respectively, and then Separate at least four wavelength components in the third optical signal from the third optical signal.
  • the material of the optical waveguide in the demultiplexer 304 is silicon nitride SiNx, or silicon Si, or silicon dioxide SiO2 to expand the tuning range through the vernier effect, so that the optical signal that the demultiplexer 304 can separate corresponds to a certain wavelength band. Adjustable within the range.
  • optical power adjuster 305 is flip-chip coupled to the demultiplexer 304, and the flip-chip coupling method can improve the coupling efficiency and reduce the size of the multi-wavelength light source.
  • the optical power adjuster 305 includes at least four semiconductor optical amplifier SOAs, and the at least four SOAs correspond to the at least four wavelength components separated by the demultiplexer 304 in a one-to-one correspondence. At least four SOAs are used to adjust the power of their respective wavelength components. SOA can amplify the power of the wavelength component, thereby reducing the difference in the power adjustment process of the separated wavelength component, and increasing the power of the adjusted wavelength component.
  • the wavelength locker 306 and the demultiplexer 304 are integrated in the first chip 310. Since the wavelength locker 306 and the demultiplexer 304 can use the same optical waveguide material, it is easier to achieve monolithic integration and reduce processing complexity.
  • the laser 301, the optical modulator 302 and the optical mixer 303 are integrated in the second chip 320.
  • the second chip 320 may be monolithically integrated by mixing heterogeneous materials, or monolithically integrated by homogeneous materials (such as indium phosphide InP).
  • the optical power adjuster 305 can also be integrated in the second chip 320, that is, the laser 301, the optical modulator 302, the optical mixer 303, and the optical power adjuster 305 are all integrated in the second chip. 320.
  • the wavelength multi-length light source includes the first chip 310 and the second chip 320 (as shown in FIG. 7), and the structure of the entire multi-length light source Compact, small size and low cost.
  • the second chip 320 is coupled to the demultiplexer 304 through a spatial coupling manner or an evanescent wave coupling manner.
  • the optical mixer 303 in the second chip 320 is coupled with the optical mixer 303 through spatial coupling or evanescent wave coupling.
  • the demultiplexer 304 is coupled.
  • the optical mixer 303 in the second chip 320 may be specifically coupled with the demultiplexer 304 through a lens, as shown in FIG. 8.
  • the second chip 320 and the demultiplexer 304 can be stacked, thereby reducing the volume of the multi-wavelength light source.
  • the optical mixer 303 and the optical power adjuster in the second chip 320 305 is coupled with the demultiplexer 304 through a spatial coupling manner or an evanescent wave coupling manner.
  • the optical mixer 303 and the optical power adjuster 305 in the second chip 320 may be specifically coupled with the demultiplexer 304 through a lens. As shown in Figure 7.
  • the second chip 320 and the demultiplexer 304 can be stacked, thereby reducing the volume of the multi-wavelength light source.
  • the first chip 310 and the second chip 320 are stacked, and the demultiplexer 304 in the first chip 310 is The optical mixer 303 and the optical power adjuster 305 in the chip 320 are coupled by evanescent wave coupling.
  • the laser 301, the optical modulator 302, the optical mixer 303, the demultiplexer 304, the optical power adjuster 305, and the wavelength locker 306 are integrated on the third chip.
  • the components in the multi-wavelength light source are integrated.
  • the third chip 330 may adopt InP monolithic integration.
  • the multi-wavelength light source can generate multi-wavelength optical signals with stable phase relationship and relative frequency deviation and higher power through the structure of laser 301, optical modulator 302, and optical mixer 303, and the optical modulator 302
  • the modulation amplitude is small, the modulator efficiency is high, and the power loss of the generated optical signal is small, so that the differential loss of the multi-wavelength light source is small, and the performance of the wavelength division multiplexing communication system can be improved.
  • the present application also provides an optical chip, which includes the multi-wavelength light source provided by any of the above embodiments.
  • optical chip provided in this application is a complete optical chip, and it also has the structure of known optical chips (such as photodetectors, optical multiplexers, etc.). Here, only multi-wavelength optical chips are involved. The components that generate the optical signal will be described, and other components will not be repeated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

一种多波长光源以及光芯片，以提高波分复用通信系统通信系统的性能。该多波长光源包括依次耦合的激光器、光调制器、光混频器、光解复用器以及光功率调整器。其中，激光器，用于产生第一光信号；光调制器，用于对激光器产生的第一光信号进行调制，产生第二光信号，第二光信号包括至少两个波长分量；光混频器，用于基于第二光信号中的至少两个波长分量进行混频，产生第三光信号，第三光信号包括至少四个波长分量；解复用器，用于将第三光信号中的至少四个波长分量，从第三光信号中分离出来；光功率调整器，用于根据设定的功率阈值，调整解复用器分离得到的波长分量的功率。

Description

一种多波长光源以及光芯片 技术领域
本申请涉及光通信技术领域，尤其涉及一种多波长光源以及光芯片。
背景技术
目前，大多数波分复用(wavelength division multiplexing，WDM)通信系统中发送端对每个波长单独调制编码，相邻波长之间存在保护间隔(gap)，收端对每个波长的信号单独处理，导致频谱效率(spectrum efficiency，SE)显著下降，传输距离也大大缩短。
为了提高波分复用通信系统的性能(SE以及传输距离等)，超通道(super channel)技术应运而生，即采用多个波长联合调制编码，每个波长之间无保护间隔，甚者允许存在一定的重叠，多个波长的信号采用一个光数字信号处理器(optical digital signal processor，ODSP)处理(非线性补偿、色散补偿)，多个波长的信号联合处理会能够显著提升高波分复用系统的频谱效率和传输距离。
在super channel技术中，各波长之间的频偏特性(多波长的中心频点相对稳定性)和相位相关性对于提高波分复用通信系的性能十分关键，因此在super channel技术中需要频偏特性稳定、相位特性相关、输出功率大的多波长光源。但是，业界尚未有能够满足上述特性的多波长光源。
发明内容
本申请提供了一种多波长光源以及光芯片，以提高波分复用通信系统的性能。
第一方面，本申请提供了一种多波长光源，该多波长光源包括：激光器，用于产生第一光信号；光调制器，用于对激光器产生的第一光信号进行调制，产生第二光信号，第二光信号包括至少两个波长分量；光混频器，用于基于第二光信号中的至少两个波长分量进行混频，产生第三光信号，第三光信号包括至少四个波长分量；解复用器，用于将第三光信号中的至少四个波长分量，从第三光信号中分离出来；光功率调整器，用于根据设定的功率阈值，调整解复用器分离得到的至少四个波长分量的功率。
通过上述方案，多波长光源通过激光器、光调制器以及光混频器的架构，可以产生相位关系和相对频偏较稳定、功率较高的多波长光信号，并且光调制器的调制幅度小，产生的光信号功率差损较小，使得多波长光源的差损较小，进而可以提高波分复用通信系统的性能。
一个可能的实施方式中，激光器包括但限于外腔激光器ECL、分布式布拉格反射镜DBR激光器、分布式反馈激光器DFB或者量子阱QW半导体激光器中的任意一种。
一个可能的实施方式中，光调制器可以为马赫-曾德尔调制器MZM。
一个可能的实施方式中，光混频器可以为四波混频半导体光放大器FWM SOA，FWM SOA不仅能够通过混频产生更多的波长分量，还能放大所产生的包含这些波长分量的第三光信号，有利于提高多波长光源最终输出的光信号的功率，并且第三信号中各个波长分量之间的功率差较小，有利于光功率调整器进行功率均衡。
一个可能的实施方式中，光功率调整器具体用于：当解复用器分离得到的波长分量的 功率大于设定的功率阈值时，减小解复用器分离得到的波长分量的功率；当解复用器分离得到的波长分量的功率小于设定的功率阈值时，增大解复用器分离得到的波长分量的功率。
一个可能的实施方式中，光功率调整器包括至少四个半导体光放大器SOA，至少四个SOA与解复用器分离得到的至少四个波长分量一一对应。至少四个SOA分别用于调整各自对应的波长分量的功率。SOA可以放大波长分量的功率，进而可以减小波长分量在功率调整的过程中的差损，提高调整后的波长分量的功率。
一个可能的实施方式中，该多波长光源还可以包括波长锁定器，波长锁定器用于稳定激光器产生的第一光信号的波长，波长锁定器可以从激光器、调制器、光混频器、解复用器以及光功率调整器中任意一个进行分光，根据获得的光信号的波长与按照实际需求设定的第一光信号得到的分光处光信号的波长，控制激光器调整第一光信号的波长。
其中，波长锁定器可以分别与激光器以及解复用器耦合，用于检测解复用器分离得到的至少四个波长分量中任意一个的波长，当被检测的波长分量的波长超出设定的波长范围时，控制激光器调整第一光信号的波长。
一个可能的实施方式中，该多波长光源还包括驱动电路，驱动电路与光调制器耦合，用于向调制器输出驱动信号；光调制器具体用于：利用驱动电路输出的驱动信号对第一光信号进行调制，得到第二光信号；其中，第二光信号包括第一波长分量和第二波长分量，第一波长分量的频率为f0+fm，第二波长分量的频率为f0-fm，f0为第一光信号的频率，fm为驱动信号的频率。
一个可能的实施方式中，驱动电路通过感性导线(即导线的阻抗成感性)与光调制器耦合，且当驱动信号的频率为fm时，光调制器的转换效率最大。其中，感性导线可以通过金线(wire bond)工艺实现。
由于光调制器的阻抗成容性，利用感性导线与光调制器的阻抗可以构成LC谐振电路，使得该LC谐振电路在频率fm处谐振，进而使得光调制器的转换效率最大，进而可以实现在输入信号幅值一定的时获得更高的输出功率，降低驱动信号的功率。
一个可能的实施方式中，解复用器中光波导的材料为氮化硅SiNx，或者硅Si，或者二氧化硅SiO2，以通过游标效应扩大调谐范围，使得解复用器可以分离的光信号对应的波段在一定范围内可调。
一个可能的实施方式中，光功率调整器倒装耦合至解复用器，采用倒装耦合方式可以提升耦合效率，且能够减少多波长光源的尺寸。
一个可能的实施方式中，波长锁定器与解复用器集成在第一芯片中。由于波长锁定器可以与解复用器可以采用相同的光波导材料，比较容易实现单片集成，降低加工复杂度。
一个可能的实施方式中，激光器、光调制器以及光混频器集成在第二芯片中，使得多波长光源的结构紧凑。第二芯片可以采用异质材料混合单片集成，也可以采用同质材料(如磷化铟InP)单片集成。
一个可能的实施方式中，激光器、光调制器、光混频器以及光功率调整器集成在第二芯片中，使得多波长光源的结构紧凑。在波长锁定器与解复用器集成在第一芯片中的场景下，波多长光源包括第一芯片和第二芯片，整个多长光源的结构紧凑，体积较小，成本较低。
一个可能的实施方式中，第二芯片通过空间耦合方式或者倏逝波耦合方式与解复用器304耦合。具体地，在第二芯片中集成有激光器、光调制器以及光混频器的场景下，第二 芯片中的光混频器通过空间耦合方式或者倏逝波耦合方式与解复用器耦合；在第二芯片中集成有激光器、光调制器、光混频器以及光功率调整器的场景下，第二芯片中的光混频器以及光功率调整器通过空间耦合方式或者倏逝波耦合方式与解复用器耦合。
一个可能的实施方式中，在第二芯片中集成有激光器、光调制器以及光混频器的场景下，当第二芯片通过空间耦合方式与解复用器耦合时，第二芯片中的光混频器具体可以通过透镜与解复用器耦合。在第二芯片中集成有激光器、光调制器、光混频器以及光功率调整器的场景下，第二芯片中的光混频器以及光功率调整器具体可以通过透镜与解复用器耦合。
一个可能的实施方式中，激光器、光调制器、光混频器、解复用器、光功率调整器以及波长锁定器集成在第三芯片中，即该多波长光源中各部件集成在一起。
第二方面，本申请还提供了一种光芯片，该光芯片包括上述第一方面任意一种可能的实施方式所述的多波长光源。
可以理解地，上述提供的任一种光芯片包括上述第一方面所述的多波长光源，因此，其所能达到的有益效果可参考第一方面所提供的对应的多波长光源中的有益效果，此处不再赘述。
附图说明
图1为现有技术中一种多波长光源的结构示意图；
图2为现有技术中另一种多波长光源的结构示意图；
图3为本申请实施例提供的一种多波长光源的结构示意图之一；
图4为本申请实施例提供的一种多波长光源的结构示意图之二；
图5为本申请实施例提供的一种多波长光源的结构示意图之三；
图6为本申请实施例提供的一种多波长光源中驱动电路与光调制器之间的连接示意图；
图7为本申请实施例提供的一种多波长光源的结构示意图之三；
图8为本申请实施例提供的一种多波长光源的结构示意图之四；
图9为本申请实施例提供的一种多波长光源的结构示意图之五。
具体实施方式
在super channel技术中，各波长之间的频偏特性(多波长的中心频点相对稳定性)和相位相关性对于提高波分复用通信系统的性能十分关键。现有技术中，多波长光源(以四波长光源为例)主要通过以下两种方式实现：
方式一、通过马赫-曾德尔调制器(Mach-Zehnder modulator，MZM)级联实现多波长。如图1所示，该多波长光源由波长锁定器(locker)101、激光器(laser)102、两个级联的MZM 103和MZM 104、时钟系统105、驱动器106和驱动器107、移相器108以及波长选择开关(wavelength select switch，WSS)109这些分立器件组成。其中，波长锁定器101用于稳定激光器102产生的光信号的波长；激光器102通常采用商用的激光器，用于产生光信号；时钟系统105通常利用高精度的时钟仪表产生时钟信号，用于控制激光器102发射的光信号的波长间隔；驱动器106以及驱动器107用于放大时钟系统105产生的时钟信号；移相器108，用于调整驱动器107放大后的时钟信号的相位，以使MZM 104能够产生 更多波长的光载波信号以及MZM 104的输出功率平坦；MZM 103，用于基于驱动器106放大的时钟信号，对激光器102产生的光信号进行调制；MZM 104，用于基于移相器108输出的信号，对MZM 103输出的光信号进行调制；WSS 109用于将MZM 104输出的光信号分解为多个光载波信号，并将多个光载波信号的功率衰减为相同值。
但是，每一级MZM会同时产生直流差损和调制差损，且WSS通过衰减的方式调平光功率，通常有约7～20db差损，进而导致上述多波长光源的转换效率较低，使得最终输出的多个光载波信号的功率非常低，无法满足功率预算，进而使得利用上述多波长光源产生的光载波信号进行数据传输时无法接收端的接收灵敏度要求。
方式二、通过4个独立的光源共享一个波长锁定器，实现多波长光源，其中，波长锁定器用于控制每个光源产生的光载波的相对频偏。如图2所示，该多波长光源包括4个独立的激光器201-激光器204，激光器201-激光器204共享一个波长锁定器205。
但是，激光器201-激光器204这四个激光器的相位噪声独立分布，没有相关性，进而导致波分复用通信系统的性能下降，并且每个光源产生的光载波的相对频偏的控制精度较低。
为了解决现有技术中存在的上述问题，本申请提供了一种多波长光源以及光芯片，以提高波分复用通信系统的性能。
另外，需要理解的是，在本申请的描述中，“多个”指两个或两个以上；“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
本申请提供了一种多波长光源，应用于高波分复用通信系统，如图3所示，该多波长光源包括依次耦合的激光器301、光调制器302、光混频器303、光解复用器304以及光功率调整器305。其中，
激光器301，用于产生第一光信号。其中，激光器301包括但限于外腔激光器(external cavity laser，ECL)、分布式布拉格反射镜(distributed Bragg reflector，DBR)激光器、分布式反馈激光器(distributed feedback laser，DFB)或者量子阱(quantum well，QW)半导体激光器中的任意一种。
光调制器302，用于对激光器301产生的第一光信号进行调制，产生第二光信号；其中，第二光信号包括至少两个波长分量。其中，光调制器302可以为马赫-曾德尔调制器MZM。
光混频器303，用于基于第二光信号中的至少两个波长分量进行混频，产生第三光信号，第三光信号包括至少四个波长分量。其中，光混频器303可以为四波混频(four wavelength mixing，FWM)半导体光放大器(semiconductor optical amplifier，SOA)，FWM SOA不仅能够产生第三光信号，还能放大第三光信号，有利于提高多波长光源最终输出的光信号的功率，并且第三信号中各个波长分量之间的功率差较小，有利于光功率调整器305进行功率均衡。
解复用器(demux)304，用于将第三光信号中的至少四个波长分量，从第三光信号中分离出来。
光功率调整器305，用于根据设定的功率阈值，调整解复用器304分离得到的至少四 个波长分量的功率。
进一步地，光功率调整器305具体用于：当解复用器304分离得到的波长分量的功率大于设定阈值时，减小解复用器304分离得到的波长分量的功率；当解复用器304分离得到的波长分量的功率小于设定阈值时，增大解复用器304分离得到的波长分量的功率，使得调整后的波长分量的功率与设定的功率阈值的差值在设定误差范围内，即调整后的至少四个波长分量的功率相等或近似相等。
进一步地，该多波长光源还可以包括波长锁定器，波长锁定器用于稳定激光器301产生的第一光信号的波长，波长锁定器可以从激光器301、调制器302、光混频器303、解复用器304以及光功率调整器305中任意一个进行分光，根据获得的光信号的波长与按照实际需求设定的第一光信号得到的分光处光信号的波长，控制激光器301将第一光信号的波长稳定在设定的范围内。
在具体实施中，波长锁定器以及解复用器可以采用相同的光波导材料，波长锁定器与解复用器比较容易实现单片集成，因此，波长锁定器通常从解复用器处分光，以调整激光器产生的第一光信号的波长。在这一场景下，如图4所示，波长锁定器306分别与激光器301以及解复用器304耦合，用于检测解复用器304分离得到的至少四个波长分量中任意一个的波长，当被检测的波长分量的波长超出设定的波长范围时，控制激光器301调整第一光信号的波长。
其中，波长锁定器306中同时集成光电探测器(photodetector，PD)和可变光衰减器(variable optical attenuator，VOA)，以实现光信号波长的精确闭环锁定。
进一步地，如图5所示，该多波长光源还包括驱动电路307，驱动电路307与光调制器302耦合，用于向调制器302输出驱动信号；光调制器302具体用于：利用驱动电路307输出的驱动信号对第一光信号进行调制，得到第二光信号；其中，第二光信号包括第一波长分量和第二波长分量，第一波长分量的频率为f0+fm，第二波长分量的频率为f0-fm，f0为第一光信号的频率，fm为驱动信号的频率。
进一步地，如图6所示，驱动电路307通过感性导线(即导线的阻抗成感性)与光调制器耦合，且当驱动信号的频率为fm时，光调制器302的转换效率最大。其中，感性导线可以通过金线(wire bond)工艺实现。由于光调制器302的阻抗成容性，利用感性导线与光调制器302的阻抗可以构成LC谐振电路，使得该LC谐振电路在频率fm处谐振，进而使得光调制器302的转换效率最大，进而可以实现在输入信号幅值一定的时获得更高的输出功率，降低驱动信号的功率。
下面以该多波长光源为四波长光源为例，对该多波长光源中每个器件的工作原理进行说明。激光器301产生第一光信号，第一光信号的波长为λ0，第一光信号的频率为f0；调制器302利用驱动电路307提供的驱动信号，对第一光信号进行调制得到的第二光信号，第二光信号中包括波长为λ21的第一波长分量和波长为λ22的第二波长分量，其中，第一波长分量的频率为f0+fm，第二波长分量的频率为f0-fm；光混频器303混频得到第三光信号中包括波长为λ21的第三波长分量和波长为λ22的第四波长分量、波长为λ31的第五波长分量和波长为λ32的第六波长分量，第三波长分量的频率为f0+fm，第四波长分量的频率为f0-fm，第五波长分量的频率为f0+3fm，第六波长分量的频率为f0-3fm；解复用器304将这四个波长分量从第三光信号中分离出来；光功率调整器305调整解复用器304得到的四个波长分量的功率，调整后的四个波长分量可以作为波分复用通信系统中的光载波。
在具体实施中，解复用器304可以通过多通道的可调带通滤波器实现，将光混频器303产生的第三信号中的干扰波长分量滤除，分别得到有用的波长分量，进而实现将第三光信号中的至少四个波长分量从第三光信号中分离出来。解复用器304中光波导的材料为氮化硅SiNx，或者硅Si，或者二氧化硅SiO2，以通过游标效应扩大调谐范围，使得解复用器304可以分离的光信号对应的波段在一定范围内可调。
进一步地，光功率调整器305倒装(flip chip)耦合至解复用器304，采用倒装耦合方式可以提升耦合效率，且能够减少多波长光源的尺寸。
进一步地，光功率调整器305包括至少四个半导体光放大器SOA，至少四个SOA与解复用器304分离得到的至少四个波长分量一一对应。至少四个SOA分别用于调整各自对应的波长分量的功率。SOA可以放大波长分量的功率，进而可以减小分离得到的波长分量在功率调整的过程中的差损，提高调整后的波长分量的功率。
在具体实施中，如图7所示，波长锁定器306与解复用器304集成在第一芯片310中。由于波长锁定器306可以与解复用器304可以采用相同的光波导材料，比较容易实现单片集成，降低加工复杂度。
在一个可能的实施方式中，如图8所示，激光器301、光调制器302以及光混频器303集成在第二芯片320中。第二芯片320可以采用异质材料混合单片集成，也可以采用同质材料(如磷化铟InP)单片集成。
进一步地，如图7所示，光功率调整器305也可以集成在第二芯片320中，即激光器301、光调制器302、光混频器303以及光功率调整器305均集成在第二芯片320。在波长锁定器306与解复用器304集成在第一芯片310中的场景下，该波多长光源包括第一芯片310和第二芯片320(如图7所示)，整个多长光源的结构紧凑，体积较小，成本较低。
进一步地，第二芯片320通过空间耦合方式或者倏逝波耦合方式与解复用器304耦合。具体地，在第二芯片320中集成有激光器301、光调制器302以及光混频器303的场景下，第二芯片320中的光混频器303通过空间耦合方式或者倏逝波耦合方式与解复用器304耦合。进一步地，当第二芯片320通过空间耦合方式与解复用器304耦合时，第二芯片320中的光混频器303具体可以通过透镜与解复用器304耦合，如图8所示。当第二芯片320通过倏逝波耦合方式与解复用器304耦合时，第二芯片320与解复用器304可以堆叠设置，进而可以减小多波长光源的体积。
具体地，在第二芯片320中集成有激光器301、光调制器302、光混频器303以及光功率调整器305的场景下，第二芯片320中的光混频器303以及光功率调整器305通过空间耦合方式或者倏逝波耦合方式与解复用器304耦合。进一步地，当第二芯片320通过空间耦合方式与解复用器304耦合时，第二芯片320中的光混频器303以及光功率调整器305具体可以通过透镜与解复用器304耦合，如图7所示。当第二芯片320通过倏逝波耦合方式与解复用器304耦合时，第二芯片320与解复用器304可以堆叠设置，进而可以减小多波长光源的体积。例如，在波长锁定器306与解复用器304集成在第一芯片310中的场景下，第一芯片310与第二芯片320堆叠设置，第一芯片310中的解复用器304与第二芯片320中的光混频器303以及光功率调整器305通过倏逝波耦合方式耦合。
在另一个可能的实施方式中，如图9所示，激光器301、光调制器302、光混频器303、解复用器304、光功率调整器305以及波长锁定器306集成在第三芯片330中，即该多波长光源中各部件集成在一起。具体地，第三芯片330可以采用InP单片集成。
通过上述方案，多波长光源通过激光器301、光调制器302以及光混频器303的架构，可以产生相位关系和相对频偏较稳定、功率较高的多波长光信号，并且光调制器302的调制幅度小，调制器效率高，产生的光信号功率差损较小，使得多波长光源的差损较小，进而可以提高波分复用通信系统的性能。
基于以上实施例，本申请还提供了一种光芯片，该光芯片包括上述任意一种实施方式提供的多波长光源。
应当理解的是，本申请提供的光芯片为一个完整的光芯片，也具备已知的光芯片具有的结构(如光探测器、光复用器等)，在此仅对光芯片中涉及多波长光信号产生的部件进行说明，对于其他部件不予赘述。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (16)

  1. 一种多波长光源，其特征在于，包括:
    激光器，用于产生第一光信号；
    光调制器，用于对所述第一光信号进行调制，产生第二光信号；其中，所述第二光信号包括至少两个波长分量；
    光混频器，用于基于所述第二光信号中的至少两个波长分量进行混频，产生第三光信号；所述第三光信号包括至少四种波长分量；
    解复用器，用于将所述第三光信号中的至少四个波长分量，从所述第三信号中分离出来；
    光功率调整器，用于根据设定的功率阈值，调整所述解复用器分离得到的波长分量的功率。
  2. 如权利要求1所述的多波长光源，其特征在于，所述光功率调整器具体用于：当所述解复用器分离得到的波长分量的功率大于所述功率阈值时，减小所述解复用器分离得到的波长分量的功率；当所述解复用器分离得到的波长分量的功率小于所述功率阈值时，增大所述解复用器分离得到的波长分量的功率。
  3. 如权利要求1或2所述的多波长光源，其特征在于，还包括：波长锁定器，所述波长锁定器分别与所述激光器以及所述解复用器耦合，用于检测所述解复用器分离得到的至少四个波长分量中任意一个的波长，当被检测的波长分量的波长超出设定的波长范围时，控制所述激光器调整所述第一光信号的波长。
  4. 如权利要求3所述的多波长光源，其特征在于，所述波长锁定器与所述解复用器集成在第一芯片中。
  5. 如权利要求1-4任意一项所述的多波长光源，其特征在于，还包括：驱动电路，所述驱动电路与所述光调制器耦合，用于向所述调制器输出驱动信号；
    所述光调制器具体用于：利用所述驱动信号对所述第一光信号进行调制，得到所述第二光信号；其中，所述第二光信号包括第一波长分量和第二波长分量；所述第一波长分量的频率为f0+fm，所述第二波长分量的频率为f0-fm，f0为所述第一光信号的频率，fm为所述驱动信号的频率。
  6. 如权利要求5所述的多波长光源，其特征在于，所述驱动电路通过感性导线与所述光调制器耦合，且当所述驱动信号的频率为fm时，所述光调制器的转换效率最大。
  7. 如权利要求1-6任意一项所述的多波长光源，其特征在于，所述激光器、所述光调制器以及所述光混频器集成在第二芯片中。
  8. 如权利要求7所述的多波长光源，其特征在于，所述光功率调整器集成在所述第二芯片中。
  9. 如权利要求7或8所述的多波长光源，其特征在于，所述第二芯片通过空间耦合方式或者倏逝波耦合方式与所述解复用器耦合。
  10. 如权利要求3所述的多波长光源，其特征在于，所述激光器、所述光调制器、所述光混频器、所述解复用器、所述光功率调整器以及所述波长锁定器集成在第三芯片中。
  11. 如权利要求1-10任意一项所述的多波长光源，其特征在于，所述光功率调整器倒装耦合至所述解复用器。
  12. 如权利要求1-11任意一项所述的多波长光源，其特征在于，所述解复用器中光波导的材料为氮化硅SiNx，或者硅Si，或者二氧化硅SiO2。
  13. 如权利要求1-12任意一项所述的多波长光源，其特征在于，所述光混频器为四波混频半导体光放大器FWM SOA。
  14. 如权利要求1-13任意一项所述的多波长光源，其特征在于，所述光功率调整器包括至少四个半导体光放大器SOA，所述至少四个SOA与所述解复用器分离得到的至少四个波长分量一一对应；
    所述至少四个SOA分别用于调整各自对应的波长分量的功率。
  15. 如权利要求1-14任意一项所述的多波长光源，其特征在于，所述光调制器为马赫-曾德尔调制器MZM。
  16. 一种光芯片，其特征在于，包括如权利要求1-15任意一项所述的多波长光源。
PCT/CN2019/098745 2019-07-31 2019-07-31 一种多波长光源以及光芯片 WO2021016966A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201980096584.8A CN113853755B (zh) 2019-07-31 2019-07-31 一种多波长光源以及光芯片
PCT/CN2019/098745 WO2021016966A1 (zh) 2019-07-31 2019-07-31 一种多波长光源以及光芯片
US17/587,553 US11990987B2 (en) 2019-07-31 2022-01-28 Multi-wavelength light source and photonic chip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/098745 WO2021016966A1 (zh) 2019-07-31 2019-07-31 一种多波长光源以及光芯片

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/587,553 Continuation US11990987B2 (en) 2019-07-31 2022-01-28 Multi-wavelength light source and photonic chip

Publications (1)

Publication Number Publication Date
WO2021016966A1 true WO2021016966A1 (zh) 2021-02-04

Family

ID=74228256

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/098745 WO2021016966A1 (zh) 2019-07-31 2019-07-31 一种多波长光源以及光芯片

Country Status (3)

Country Link
US (1) US11990987B2 (zh)
CN (1) CN113853755B (zh)
WO (1) WO2021016966A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023124410A1 (zh) * 2021-12-30 2023-07-06 华为技术有限公司 一种数据传输方法、射频单元、基带单元及通信系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101686096A (zh) * 2008-09-27 2010-03-31 华为技术有限公司 一种多载波相干接收电处理的方法、装置和系统
CN101771471A (zh) * 2008-12-31 2010-07-07 华为技术有限公司 一种多载波偏振复用传输的方法、装置和系统
US20120020665A1 (en) * 2009-04-28 2012-01-26 Fujitsu Limited Optical signal processor
CN104601239A (zh) * 2015-01-12 2015-05-06 西南交通大学 一种基于强度噪声方差以及低通滤波器的光纤自适应非线性补偿方案

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7127168B2 (en) * 2001-06-13 2006-10-24 Nippon Telegraph And Telephone Corporation Multi-wavelength optical modulation circuit and wavelength-division multiplexed optical signal transmitter
WO2004074805A1 (ja) * 2003-02-18 2004-09-02 Fujitsu Limited 光源装置
CN1863026B (zh) * 2005-05-12 2010-07-14 中兴通讯股份有限公司 采用多波长激光器的波分复用终端设备
US8103168B1 (en) * 2006-11-09 2012-01-24 Lockheed Martin Corporation RF discrete time optical frequency translator
JP4963462B2 (ja) * 2007-11-05 2012-06-27 日本電信電話株式会社 多波長光源装置
US8170417B2 (en) * 2009-02-06 2012-05-01 At&T Intellectual Property I, L.P. Mechanism to detect an unstable wavelength channel and limit its impact on a ROADM network
US8457165B2 (en) * 2010-05-26 2013-06-04 Google Inc. Tunable multi-wavelength semiconductor laser array for optical communications based on wavelength division multiplexing
JP5803164B2 (ja) 2011-03-10 2015-11-04 富士通株式会社 光送信器
US8582983B2 (en) 2011-03-10 2013-11-12 Zte Corporation Method and system for generation of coherent subcarriers
US10498457B2 (en) * 2011-09-30 2019-12-03 Sumitomo Osaka Cement Co., Ltd. Optical carrier-suppressed signal generator
US10009106B2 (en) * 2012-05-14 2018-06-26 Acacia Communications, Inc. Silicon photonics multicarrier optical transceiver
US9450696B2 (en) * 2012-05-23 2016-09-20 Vadum, Inc. Photonic compressive sensing receiver
EP3130090B1 (en) * 2014-04-10 2018-01-03 Telefonaktiebolaget LM Ericsson (publ) Radio-over-fibre transmission in communications networks
JP2016046412A (ja) 2014-08-25 2016-04-04 日本電信電話株式会社 マルチチャネルレーザ光源
US9778493B1 (en) * 2016-09-22 2017-10-03 Oracle International Corporation Dual-ring-modulated laser that uses push-push/pull-pull modulation
EP3300270A1 (en) 2016-09-27 2018-03-28 Alcatel Lucent Multi-channel optical transmitter
CN108768514B (zh) * 2017-04-19 2020-05-22 中兴通讯股份有限公司 光网络系统、装置及方法
JP7193716B2 (ja) * 2018-12-10 2022-12-21 日本電信電話株式会社 無線通信システム、親局装置及び無線通信方法
CN109708743B (zh) * 2019-02-20 2020-11-03 湖北工业大学 一种干涉式光纤水听器探测系统
JP7415715B2 (ja) * 2020-03-24 2024-01-17 富士通株式会社 光通信素子、光送信器及び制御方法
CN113872697B (zh) * 2020-06-30 2023-09-12 华为技术有限公司 光发送机和光调制的方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101686096A (zh) * 2008-09-27 2010-03-31 华为技术有限公司 一种多载波相干接收电处理的方法、装置和系统
CN101771471A (zh) * 2008-12-31 2010-07-07 华为技术有限公司 一种多载波偏振复用传输的方法、装置和系统
US20120020665A1 (en) * 2009-04-28 2012-01-26 Fujitsu Limited Optical signal processor
CN104601239A (zh) * 2015-01-12 2015-05-06 西南交通大学 一种基于强度噪声方差以及低通滤波器的光纤自适应非线性补偿方案

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023124410A1 (zh) * 2021-12-30 2023-07-06 华为技术有限公司 一种数据传输方法、射频单元、基带单元及通信系统

Also Published As

Publication number Publication date
US11990987B2 (en) 2024-05-21
US20220149972A1 (en) 2022-05-12
CN113853755B (zh) 2022-12-30
CN113853755A (zh) 2021-12-28

Similar Documents

Publication Publication Date Title
US6421151B1 (en) Method and arrangement for stabilizing wavelength of multi-channel optical transmission systems
TWI285012B (en) Apparatus and method for wavelength-locked loops for systems and applications employing electromagnetic signals
US9583913B1 (en) Tunable laser with integrated wavelength reference
JP5112508B2 (ja) 光ファイバ通信における低減されたチャープによるトランスミッタのための方法と装置
EP1895689B1 (en) Wavelength variable laser
US20090214223A1 (en) Cmos-compatible tunable microwave photonic band-stop filter
CN101682166B (zh) 光调制信号产生装置和光调制信号产生方法
CA2510352A1 (en) Power source for a dispersion compensation fiber optic system
GB2381121A (en) Optical Frequency Synthesizer
CN111934162B (zh) 基于微波光子滤波器的宇称时间对称光电振荡器倍频系统
WO2012099914A1 (en) High spectral-purity carrier wave generation by nonlinear optical mixing
CA2619307C (en) Optical transmitting apparatus and temperature controlling method used therefor
US11990987B2 (en) Multi-wavelength light source and photonic chip
CN117039611B (zh) 一种倍频太赫兹光电振荡器装置及其振荡方法
US20050286907A1 (en) System, device, and method for radio frequency optical transmission
CN111490438B (zh) 一种可调谐微波信号产生系统及方法
KR101748876B1 (ko) 광 섬유를 사용하여 광대역 무선 시그널을 전송하기 위한 안정적인 밀리미터파 소스
CN111048978B (zh) 一种多波长激光器
JP4124555B2 (ja) 周波数安定化半導体レーザ装置
JP4828447B2 (ja) 周波数変調器
CN116155391B (zh) 一种带宽和中心频率可调的微波光子滤波系统
JP2006005531A (ja) 多チャンネル光送信装置
US11429007B2 (en) Electro-optical modulator and method of modulating an optical beam to carry an RF signal
KR100579512B1 (ko) 자체적으로 파장가변 레이저 광원을 생성하는 파장변환기
WO2024065174A1 (zh) 光发射机、光发射方法、光模块、设备及系统

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19939455

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19939455

Country of ref document: EP

Kind code of ref document: A1