WO2018171483A1 - 一种相干光装置 - Google Patents
一种相干光装置 Download PDFInfo
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- WO2018171483A1 WO2018171483A1 PCT/CN2018/079018 CN2018079018W WO2018171483A1 WO 2018171483 A1 WO2018171483 A1 WO 2018171483A1 CN 2018079018 W CN2018079018 W CN 2018079018W WO 2018171483 A1 WO2018171483 A1 WO 2018171483A1
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- 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
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
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- 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
- H04B10/40—Transceivers
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- 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
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/615—Arrangements affecting the optical part of the receiver
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- 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
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/616—Details of the electronic signal processing in coherent optical receivers
Definitions
- the present disclosure relates to, but is not limited to, the field of communications, and in particular to a coherent optical device.
- optical modules are very critical components, and the performance of optical modules largely determines the transmission performance of optical systems.
- the optical module is installed on the service board and is connected to the service board through a high-speed electrical interface.
- the function of the optical module is to complete the photoelectric and electro-optical conversion.
- the transmitting side of the optical module sends the high-level electrical signals sent by the service board. After being processed by code modulation and the like, it is converted into an optical signal and sent to the optical fiber.
- the receiving side of the optical module converts the optical signal transmitted from the optical fiber into an electrical signal for demodulation and the like, and recovers the data signal and then passes through the high-speed electrical interface. Send it to the business card for processing.
- single-wave 100G optical modules using polarization multiplexing quadrature phase shift keying and coherent receiving techniques have been commercially available on a large scale.
- the 100G optical network uses a conventional 50 GHz grid to achieve a spectral efficiency of 2 bits/s/Hz, which is 10 times better than that of a 10G optical network. Thanks to coherent reception and digital signal processing (Digital Signal Processing) technology, the 100G optical system can achieve long-distance transmission from 2000 to 2500km, and the dispersion compensation module is no longer required.
- the industry is investing heavily in the development of 400G and 1T or higher speed optical transmission technologies, of which 400G optical modules have been commercialized.
- the 400G optical module cannot quadruple the spectral efficiency while achieving the same transmission distance as the 100G system.
- 400G or 1T coherent receiving optical module requires a more complex DSP chip than the 100G optical module algorithm, which means greater power consumption.
- the DSP chip in the 100G optical module consumes about 50W, and the DSP chip in the 400G optical module may reach 80W or more.
- the DSP chip required for the 1T optical module will consume more power, which will bring great challenges to heat dissipation.
- Embodiments of the present disclosure provide a coherent optical device to increase signal baud rate and reduce system power consumption.
- An embodiment of the present disclosure provides a coherent optical device, including: a receiving end optical logic device, and a data signal interface;
- the receiving end optical logic device is configured to: perform optical domain signal processing on the input optical signal and send the processed signal to the data signal interface;
- the data signal interface is configured to: send the signal processed by the receiving optical logic device to the service card.
- the receiving optical logic device is configured to perform optical domain signal processing on the optical signal, including one or any combination of the following:
- the method further includes:
- the local oscillator laser is configured to: provide a local oscillator signal for mixing with an optical signal input to the optical logic device at the receiving end.
- the method further includes:
- the optical transmitter array is configured to: convert an electrical signal sent by the data signal interface into an optical signal, and divide a beam from the optical signal as a local oscillator, where the local oscillator is used for inputting The optical signal of the receiving optical logic device is mixed.
- An optical mixer configured to: mix an optical signal input to the optical mixer with the local oscillator optical signal, and output a multi-line polarized optical signal to the receiving end optical logic device;
- the receiving end optical logic device is configured to perform optical domain analog-to-digital conversion and optical domain digital signal processing on the multi-route polarized optical signal.
- the receiving end optical logic device is further configured to: output the processed signal to the photodetector array by using multiple parallel low-rate optical signals;
- the photodetector array is configured to: convert the multiple parallel low rate optical signals into multiple parallel electrical signals, and send the multiple parallel electrical signals to the service board via the data signal interface .
- the data signal interface is an optical interface or an opto-electric hybrid interface.
- the method further includes:
- the transmitting optical logic device is configured to: process the signal from the service board and send it;
- the data signal interface is further configured to: send a signal sent by the service card to the sending end logic device.
- the embodiment of the present disclosure further provides a coherent optical device, including: a transmitting optical logic device and a data signal interface; wherein the data signal interface is configured to: send a signal sent by the service card to the sending The end logic device is configured to: send and process a signal from the service board.
- a coherent optical device including: a transmitting optical logic device and a data signal interface; wherein the data signal interface is configured to: send a signal sent by the service card to the sending
- the end logic device is configured to: send and process a signal from the service board.
- the transmitting optical logic device is configured to process signals from a service card, including one or any combination thereof: signal/rate conversion; forward error correction coding; modulation code Type conversion and amplification.
- the method further includes:
- the optical transmitter array is configured to: perform electro-optical conversion on the multiple low-speed electrical signals sent from the data signal interface, and output multiple parallel optical signals to the transmitting optical logic device.
- the method further includes:
- the receiving end optical logic device is configured to: perform optical domain data processing on the input optical signal, and send the processed signal to the service board through the data signal interface;
- the data signal interface is further configured to: send the signal processed by the receiving optical logic device to the service card.
- a coherent optical device which implements functions of digital signal processing, modulation pattern conversion, signal amplification, high-speed analog-to-digital conversion, and signal rate conversion by using optical logic devices, thereby breaking the rate bottleneck of high-speed electrical signal processing.
- Multi-channel parallel low-rate optical transmitter arrays and photodetector arrays can be used to significantly reduce the power consumption of optical modules and achieve optical transmission at 400G, 1T or higher.
- the data signal interface between the service board and the service board can be implemented by using an optical interface or an optical hybrid interface.
- the optical interface is used to transmit data between the optical module and the service board
- the interior of the coherent optical device is no longer Optoelectronic and electro-optical conversion is required, which is beneficial to the coherent optical device to use multiple parallel low-rate optical transmitter arrays and photodetector arrays, thereby greatly reducing the power consumption of the optical module and achieving optical transmission at 400G, 1T or even higher.
- FIG. 1 is a schematic structural diagram of a coherent optical device according to an embodiment of the present disclosure
- FIG. 2 is a schematic structural diagram of another coherent optical device according to an embodiment of the present disclosure.
- FIG. 3 is a schematic structural diagram of a structure of a coherent optical device according to a first embodiment of the present disclosure
- FIG. 4 is a schematic structural diagram of a structure of a coherent optical device according to a second embodiment of the present disclosure
- FIG. 5 is a schematic structural diagram of a structure of a coherent optical device according to a third embodiment of the present disclosure.
- FIG. 6 is a schematic structural diagram of a structure of a coherent optical device according to a fourth embodiment of the present disclosure.
- FIG. 7 is a schematic structural diagram of a structure of a coherent optical device according to a fifth embodiment of the present disclosure.
- All-optical logic devices are attracting attention due to their high processing speed, low power consumption, and no need for photoelectric conversion.
- preliminary research has been made on all-optical logic devices, and all-optical OR gates, AND gates, NOR gates, and NAND gates have been reported.
- the use of optical logic devices to achieve signal wavelength conversion, all-optical 3R regeneration, all-optical logic operation, all-optical buffer, all-optical sampling, all-optical time-domain/space-domain signal conversion, and all-optical analog-to-digital conversion in the optical domain have been realized. .
- the all-optical logic device has the advantages of high rate and low power consumption, and can support the current situation of optical transmission above 400G.
- the present disclosure provides a coherent optical device, which can realize digital signal processing and modulation code by using optical logic devices.
- Type conversion, signal amplification, high-speed analog-to-digital conversion, signal rate conversion and other functions, and high-speed signal interface between the service board can be realized by optical interface or opto-electric hybrid interface, which can be applied to the field of optical modules and optical communication equipment in the field of optical communication.
- optical interface or opto-electric hybrid interface which can be applied to the field of optical modules and optical communication equipment in the field of optical communication.
- multi-channel parallel low-rate optical transmitter arrays and photodetector arrays can be used in high-rate optical modules, which greatly reduces the power consumption of optical modules and achieves 400G, 1T and higher speeds. Light transmission.
- the present disclosure provides a coherent optical device, including: a receiving end optical logic device 102, a data signal interface 101; wherein the receiving end optical logic device 102 can be configured to perform an optical domain on an input optical signal.
- the data processing and the processed signal are sent to the service card through the data signal interface; the data signal interface 101 can be configured to send the signal processed by the receiving optical logic device to the service card.
- the receiving optical logic device 102 may be configured to perform optical domain signal processing on the optical signal, and may include one or any combination of the following:
- the apparatus can include: a local oscillator laser configured to provide a local oscillator optical signal, the local oscillator optical signal being configured to mix with an optical signal input to the receiving optical logic device.
- the foregoing apparatus may further include: an optical transmitter array configured to convert an electrical signal sent by the data signal interface into an optical signal, and separate a signal from the optical signal The beam is used as the local oscillator, and the local oscillator is used for mixing with the optical signal input to the optical logic device at the receiving end.
- the apparatus may further include: an optical mixer configured to mix the optical signal input to the optical mixer with the local oscillator optical signal, and output multi-path polarization An optical signal to the receiving end optical logic device; the receiving end optical logic device 102 may be configured to perform optical domain analog to digital conversion and optical domain digital signal processing on the multi-route polarized optical signal.
- the apparatus may further include: a photodetector array; the receiving optical logic device 102 may be further configured to output the processed signal to the optical signal with multiple parallel low-rate optical signals.
- a detector array configured to convert the plurality of parallel low rate optical signals into multiplexed parallel electrical signals and to transmit the multiplexed parallel electrical signals to the Business board.
- the data signal interface may be an optical interface or an optical hybrid interface.
- the coherent optical device shown in FIG. 1 may further include: a transmitting optical logic device configured to process a signal from a service card; the data signal interface 101 may also be And sending a signal sent by the service board to the sending end logic device.
- the present disclosure further provides another coherent optical device, including: a transmitting optical logic device 103, a data signal interface 101, wherein the data signal interface 101 can be configured to send the service card The incoming signal is sent to the transmitting logic device; the transmitting optical logic device 103 can be configured to process the signal from the service card and send it.
- the sender optical logic device 103 may be configured to process signals from the service card, and may include one or any combination of the following:
- the apparatus may further include: an optical transmitter array configured to perform electro-optical conversion on the multiple low-speed electrical signals sent by the data signal interface and output the multiple parallel optical signals to the sending Optical logic device.
- the apparatus may further include: a receiving end optical logic device 102 configured to perform optical domain data processing on the input optical signal and send the processed signal to the service board through the data signal interface.
- the data signal interface 101 may be further configured to send the signal processed by the receiving optical logic device to the service card.
- optical logic devices are used to implement digital signal processing, modulation pattern conversion, signal amplification, high-speed analog-to-digital conversion, signal rate conversion, etc., and low-rate (such as 10G, 2.5G) can be used in high-speed coherent optical devices.
- Parallel photodetector or transmitter array thereby reducing cost and power consumption;
- the data interface of the coherent optical device and the service board can adopt an optical interface or an optical hybrid interface, when the optical interface is used for the optical module and When data is transmitted between the service boards, the photoelectric and electro-optical conversions are no longer required inside the coherent optical device.
- the coherent optical device of the present disclosure may include: a receiving end optical logic device 201, a data signal interface 202, a transmitting end optical logic device 203, and a local oscillator laser 204.
- the receiving optical logic device 201 (including the optical receiving port) can be connected to the data signal interface 202 and the local oscillator laser 204; the data signal interface 202 can be connected to the receiving optical logic device 201, the transmitting optical logic device 203, and the service board.
- the transmitting optical logic device 203 (including the optical transmitting port) can be connected to the data signal interface 202, and the local oscillator laser 204 can be connected to the receiving optical logic device 201.
- the receiving optical logic device 201 can be configured to perform optical domain data processing on the optical signal from the optical receiving port, and the processed signal is sent to the service card through the data signal interface 202, and the receiving optical logic device 201 can include the optical hybrid. Functional modules for frequency, optical domain analog-to-digital conversion, optical domain digital signal processing, and signal/rate conversion.
- the data signal interface 202 can be configured to connect the coherent optical device to the service card, transmit the data received by the coherent optical device to the service card, and transmit the data processed by the service card to the coherent optical device.
- the data signal interface 202 can be a single or multiple electrical signal interface, or a single or multiple optical signal interface or an opto-electric hybrid interface.
- data signal interface 202 can be high speed data electrical interface 304, high speed data electrical interface 404, optical signal interface 503, etc., in the following embodiments.
- the transmitting optical logic device 203 can be configured to perform signal/rate conversion, error correction coding, modulation pattern conversion, amplification, and the like on the signal from the service card, and then send the signal through the optical transmission port.
- the transmitting optical logic device 203 may include functional modules such as signal/rate conversion, forward error correction coding, modulation pattern conversion, and amplification.
- the local oscillator laser 204 can be configured to provide a local oscillator optical signal that can be mixed with the optical signal of the light receiving port in the receiving end optical logic device 201.
- the local oscillator laser 204 can be a narrow linewidth tunable laser.
- the coherent optical device in this embodiment uses an optical logic device to greatly reduce the power consumption of the optical module, so that the power consumption is no longer a limiting factor for developing a 400G or higher rate optical module; in addition, the coherent optical device of the present disclosure passes a low rate. Multiple parallel optical transmitter arrays and multiple parallel optical receiver arrays will also be available for use in high speed optical modules, thereby reducing cost.
- the optical interface is used to transmit data between the optical module and the service board to improve the data interface transmission rate.
- the coherent optical device of the present disclosure does not require the use of an optical transmitter and a photodetector, reducing power consumption of the optical module.
- the coherent optical device can include an optical mixer 301, a receiving optical logic device 302, a photodetector array 303, a high speed data electrical interface 304, a laser 305, an encoding and rate converting chip 306, a driver 307, and a modulator. 308 and other parts.
- the optical signal received by the optical receiving port may first enter the optical signal split by the optical mixer 301 and the laser 305, and then mix and output the multi-directional polarized light.
- the signal is sent to the receiving optical logic device 302.
- the receiving optical logic device 302 can perform analog-to-digital conversion, optical domain digital signal processing, and optical domain analog-to-digital conversion on the optical signal to output multiple parallel low-rate optical signals to the photodetector array.
- the photodetector array 303 can convert the received multiple parallel optical signals into multiple parallel electrical signals and send the multiple parallel electrical signals to the service card via the high speed data electrical interface 304.
- the multiple low-speed electrical signals sent by the high-speed data electrical interface 304 may first enter the encoding and rate conversion chip 306 for precoding, forward error correction coding, and rate conversion.
- the obtained parallel high-speed electric signals can be sent to the driver 307 for amplitude amplification, and the amplified electrical signals can be sent to the modulator 308 to modulate the optical signal sent by the laser 305, thereby loading the data signal into the optical carrier.
- the upper optical transmission port is sent to the optical fiber.
- the structure of the coherent optical device in this embodiment is as shown in FIG. 5, and may include an optical mixer 401, a receiving optical logic device 402, a photodetector array 403, a high speed data electrical interface 404, an optical transmitter array 405, and a transmitting end.
- Optical logic device 406 and other parts are shown in FIG. 5, and may include an optical mixer 401, a receiving optical logic device 402, a photodetector array 403, a high speed data electrical interface 404, an optical transmitter array 405, and a transmitting end.
- Optical logic device 406 and other parts.
- the optical signal received by the optical receiving port may first enter the local oscillator optical signal sent by the optical mixer 401 and the optical transmitter array 405 (any optical signal is taken). After mixing, the multi-line polarized optical signal can be output to the receiving end optical logic device 402, and the receiving end optical logic device 402 can perform rate conversion, optical domain digital signal processing, and optical domain on the multi-line polarized optical signal. After the analog-to-digital conversion process, the multi-channel parallel low-rate optical signal is outputted to the photodetector array 403, and the photodetector array can convert the multi-path parallel optical signal into multiple parallel electrical signals and pass the multiple parallel electrical signals via The high speed data electrical interface 404 is sent to the service card.
- the multiple low-speed electrical signals sent by the high-speed data electrical interface 404 may first enter the optical transmitter array 405 for electro-optical conversion and output multiple parallel optical signals, and multiple parallel optical signals. After being sent to the transmitting optical logic device 406 for a series of processing such as rate conversion, forward error correction coding, modulation pattern conversion and amplification, the transmitting optical logic device 406 can output a high speed optical signal and pass the high speed optical signal through the light.
- the sending port is sent to the fiber.
- the structure of the coherent optical device in this embodiment is as shown in FIG. 6, and may include an optical mixer 501, a receiving optical logic device 502, an optical signal interface 503, a transmitting optical logic device 504, and a local oscillator laser 505.
- the optical signal received by the optical receiving port may first enter the optical mixer 501 and the local oscillator optical signal sent from the local oscillator laser 505, and may be mixed after being mixed.
- the multi-route polarized optical signal is sent to the receiving end optical logic device 502, and the receiving end optical logic device 502 can perform rate conversion, optical domain digital signal processing, optical domain analog-to-digital conversion, etc. on the multi-line polarized optical signal.
- One high speed or multiple parallel low rate optical signals and the output optical signals are sent to the service board via the optical signal interface 503.
- a high-speed or multi-channel low-speed optical signal sent by the service card through the optical signal interface 503 can enter the transmitting optical logic device 504, and the transmitting optical logic device 504 can
- the high-speed or multi-channel low-speed optical signals are subjected to a series of processing such as rate conversion, forward error correction coding, modulation pattern conversion and amplification, and then output a high-speed optical signal and send the high-speed optical signal to the optical transmission port through the optical transmission port. optical fiber.
- the coherent optical device may include an integrated coherent receiver 601, an electrical domain DSP chip 602, a high speed data electrical interface 603, an optical transmitter array 604, and a transmitting optical logic device 605.
- the optical signal received by the optical receiving port can first enter the optical signal split by the integrated coherent receiver 601 and the optical transmitter array 604 for coherent detection and photoelectric conversion to obtain a high-speed electrical signal.
- the high-speed electrical signal can be sent to the electrical domain DSP chip 602 for electrical domain analog-to-digital conversion, electrical domain digital signal processing, and then output multiple parallel low-rate electrical signals and then sent to the service card via the high-speed data electrical interface 603.
- the multi-channel low-speed electrical signal sent from the high-speed data electrical interface 603 may first enter the optical transmitter array 604 to perform electro-optical conversion and output multiple parallel optical signals, and multiple parallel optical signals.
- the transmitting optical logic device 605 After being sent to the transmitting optical logic device 605 for series processing such as rate conversion, forward error correction encoding, modulation pattern conversion and amplification, the transmitting optical logic device 605 can output a high speed optical signal and transmit it via the optical transmitting port.
- each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, being executed by a processor and stored in a memory. Programs/instructions to implement their respective functions.
- the present disclosure is not limited to any specific form of combination of hardware and software.
- computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media.
- Computer storage media include, but are not limited to, Random Access Memory (RAM), Read-Only Memory (ROM), and Electrically Erasable Programmable Read-only Memory (EEPROM). Flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical disc storage, magnetic cassette, magnetic tape, disk storage or other magnetic storage device, or Any other medium used to store the desired information and that can be accessed by the computer.
- communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .
- a coherent optical device which implements functions of digital signal processing, modulation pattern conversion, signal amplification, high-speed analog-to-digital conversion, and signal rate conversion by using optical logic devices, thereby breaking the rate bottleneck of high-speed electrical signal processing.
- Multi-channel parallel low-rate optical transmitter arrays and photodetector arrays can be used to significantly reduce the power consumption of optical modules, enabling optical transmission at 400G, 1T, and higher.
- the data signal interface between the service board and the service board can be implemented by using an optical interface or an optical hybrid interface.
- the optical interface is used to transmit data between the optical module and the service board
- the interior of the coherent optical device is no longer Optoelectronic and electro-optical conversion is required, which is beneficial to the coherent optical device to use multiple parallel low-rate optical transmitter arrays and photodetector arrays, thereby greatly reducing the power consumption of the optical module and achieving optical transmission at 400G, 1T and higher.
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Abstract
一种相干光装置包括:接收端光逻辑器件、数据信号接口;其中,所述接收端光逻辑器件设置为:对输入的光信号进行光域信号处理并将处理后的信号送至所述数据信号接口;所述数据信号接口设置为:将所述接收端光逻辑器件处理后的信号送至业务板卡。
Description
本公开涉及但不限于通信领域,尤其是一种相干光装置。
随着视频业务、云计算、数据中心以及移动回传等应用领域流量的持续爆炸式增长,骨干网和城域网面临越来越大的带宽压力。在光通信系统中,光模块是非常关键的部件,光模块的性能在很大程度上决定了光系统的传输性能。光模块一般安装在业务板卡上,与业务板卡之间通过高速电接口进行连接,光模块的功能是完成光电和电光转换,光模块的发送侧将业务板卡发来的高数电信号通过编码调制等处理后转换为光信号送入光纤,光模块的接收侧则是将从光纤传来的光信号转换成电信号做解调等一系列处理后恢复出数据信号然后通过高速电接口发送给业务板卡做处理。当前,采用偏振复用正交相移键控及相干接收技术的单波100G光模块已经大规模商用。100G光网络采用常规的50GHz栅格,实现了2bit/s/Hz的频谱效率,比10G光网络的频谱效率提高了10倍。由于采用了相干接收和电域DSP(Digital Signal Processing,数字信号处理)技术,100G光系统可以实现2000至2500km的长距离传输,且不再需要配置色散补偿模块。为了提高带宽,业界正在大力投入400G和1T甚至更高速率的光传输技术的研发,其中400G光模块已经开始商用。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
由于多种因素的限制,400G光模块无法在达到与100G系统同等传输距离的同时将频谱效率提高四倍。这些因素可概括如下:
1、要提高频谱效率就需要降低信号的波特率从而获得较窄的信号频谱,这就需要采用高阶的相位调制技术比如64QAM(Quadrature Amplitude Modulation,正交幅度调制)、128QAM等调制方式,但这类高阶调制方式对光信噪比要求很高,从而导致传输距离非常短(仅数百公里),无法达到长距传输的要求;
2、如果采用较高的信号波特率,则需要比100G系统中所用芯片速率更高的电子芯片如高速光探测器和跨阻放大器、模数转换器等,而这些芯片成本高、功耗大且技术不够成熟;
3、400G或1T相干接收光模块需要采用比100G光模块算法更加复杂的DSP芯片,这就意味着更大的功耗。目前100G光模块中的DSP芯片功耗约50W、400G光模块中的DSP芯片则可能达到80W以上,1T光模块所需的DSP芯片功耗将更高,这将给散热带来极大挑战。
为此,需要找到能够突破光器件和电子芯片速率瓶颈从而提高信号波特率并且能降低系统功耗的方法和装置。
本公开实施例提供了一种相干光装置,以便提高信号波特率和降低系统功耗。
本公开实施例提供了一种相干光装置,包括:接收端光逻辑器件、数据信号接口;其中,
所述接收端光逻辑器件设置为:对输入的光信号进行光域信号处理并将处理后的信号送至所述数据信号接口;
所述数据信号接口设置为:将所述接收端光逻辑器件处理后的信号送至业务板卡。
在一种示例性实施方式中,所述接收端光逻辑器件设置为对光信号进行光域信号处理,包括如下之一或其任意组合:
光混频;
光域模数转换;
光域数字信号处理;
信号/速率转换。
在一种示例性实施方式中,还包括:
本振激光器,设置为:提供本振光信号,所述本振光信号用于与输入所述接收端光逻辑器件的光信号进行混频。
在一种示例性实施方式中,还包括:
光发射机阵列,设置为:将所述数据信号接口发来的电信号转换成光信号,并从所述光信号中分出一束作为本振光,所述本振光用于与输入所述接收端光逻辑器件的光信号进行混频。
在一种示例性实施方式中,
还包括:
光混频器,设置为:将输入所述光混频器的光信号与所述本振光信号进行混频,并输出多路线偏振的光信号至所述接收端光逻辑器件;
所述接收端光逻辑器件,是设置为:对所述多路线偏振的光信号进行光域模数转换和光域数字信号处理。
在一种示例性实施方式中,还包括:光探测器阵列;
所述接收端光逻辑器件,还设置为:将处理后的信号以多路并行低速率的光信号输出至光探测器阵列;
所述光探测器阵列,设置为:将所述多路并行低速率的光信号转换为多路并行电信号以及将所述多路并行电信号经由所述数据信号接口发送给所述业务板卡。
在一种示例性实施方式中,所述数据信号接口为光接口或光电混合的接口。
在一种示例性实施方式中,还包括:
所述发送端光逻辑器件设置为:对来自业务板卡的信号进行处理后发出;
所述数据信号接口,还设置为:将所述业务板卡发来的信号送至所述发送端逻辑器件。
本公开实施例还提供了一种相干光装置,包括:发送端光逻辑器件、数据信号接口;其中,所述数据信号接口设置为:将所述业务板卡发来的信号 送至所述发送端逻辑器件;所述发送端光逻辑器件设置为:对来自业务板卡的信号进行处理后发出。
在一种示例性实施方式中,所述发送端光逻辑器件设置为对来自业务板卡的信号进行处理,包括如下之一或其任意组合:信号/速率转换;前向纠错编码;调制码型转换及放大。
在一种示例性实施方式中,还包括:
光发射机阵列,设置为:对所述数据信号接口发来的多路低速电信号进行电光转换并输出多路并行光信号至所述发送端光逻辑器件。
在一种示例性实施方式中,还包括:
接收端光逻辑器件,设置为:对输入的光信号进行光域数据处理并将处理后的信号通过所述数据信号接口发送给业务板卡;
所述数据信号接口,还设置为:将所述接收端光逻辑器件处理后的信号送至业务板卡。
本公开实施例中提供一种相干光装置,采用光逻辑器件实现数字信号处理、调制码型转换、信号放大、高速模数转换、信号速率转换等功能,从而突破高速电信号处理的速率瓶颈,可以使用多路并行的低速率光发射机阵列和光探测器阵列,大幅降低光模块的功耗,实现400G、1T甚至更高速率的光传输。
本公开中,与业务板卡之间的数据信号接口可以采用光接口或者光电混合接口实现,当使用光接口进行光模块与业务板卡之间的数据传输时,相干光装置的内部将不再需要进行光电及电光转换,有利于相干光装置可以使用多路并行的低速率光发射机阵列和光探测器阵列,从而大幅降低光模块的功耗,实现400G、1T甚至更高速率的光传输。
在阅读并理解了附图和详细描述后,可以明白其他方面。
附图概述
图1为本公开实施例提供的一种相干光装置的组成结构示意图;
图2为本公开实施例提供的另一种相干光装置的组成结构示意图;
图3为本公开第一实施例中相干光装置的组成结构示意图;
图4为本公开第二实施例中相干光装置的组成结构示意图;
图5为本公开第三实施例中相干光装置的组成结构示意图;
图6为本公开第四实施例中相干光装置的组成结构示意图;
图7为本公开第五实施例中相干光装置的组成结构示意图。
本公开的较佳实施方式
下面结合附图对本公开的实施方式进行描述。
值得说明的是,本文中的术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。
在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行。并且,虽然在流程图中示出了逻辑顺序,但是在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤。
全光逻辑器件由于处理速度快,功耗低,不需要光电转换等众多优点而备受关注。国内外针对全光逻辑器件的研究已取得初步进展,全光异或门、与门、或非门、与非门等已有报道。采用光学逻辑器件在光域实现信号的波长转换、全光3R再生、全光逻辑运算、全光缓存、全光采样、全光时域/空域信号转换、全光模数转换等功能已得以实现。全光逻辑器件的速率高、功耗低等优点正好可以支持当前400G以上速率光传输的情形,有鉴于此,本公开提供一种相干光装置,可利用光学逻辑器件实现数字信号处理、调制码型转换、信号放大、高速模数转换、信号速率转换等功能,与业务板卡之间的高速信号接口可采用光接口或者光电混合接口实现,可应用于光通信领域的光模块和光通信设备领域,从而突破高速电信号处理的速率瓶颈,使得高速率光模块中可以使用多路并行的低速率光发射机阵列和光探测器阵列,大幅降低光模块的功耗,实现400G、1T以及更高速率的光传输。
如图1所示,本公开提供一种相干光装置,包括:接收端光逻辑器件102、数据信号接口101;其中,所述接收端光逻辑器件102可以设置为对输入的光信号进行光域数据处理并将处理后的信号通过所述数据信号接口发送给业务板卡;所述数据信号接口101可设置为将所述接收端光逻辑器件处理后的 信号送至业务板卡。
其中,所述接收端光逻辑器件102可设置为对光信号进行光域信号处理,可包括如下之一或其任意组合:
光混频;
光域模数转换;
光域数字信号处理;
信号/速率转换。
在一些可选的实现方式中,上述装置可以包括:本振激光器,设置为提供本振光信号,所述本振光信号设置为与输入所述接收端光逻辑器件的光信号进行混频。在另一种可选的实现方式中,上述装置还可以包括:光发射机阵列,设置为将所述数据信号接口发来的电信号转换为光信号,并从所述光信号中分出一束光作为本振光,该本振光用于与输入所述接收端光逻辑器件的光信号进行混频。
在一些可选的实现方式中,上述装置还可以包括:光混频器,设置为将输入所述光混频器的光信号与所述本振光信号进行混频,并输出多路线偏振的光信号至所述接收端光逻辑器件;所述接收端光逻辑器件102,可以是设置为对所述多路线偏振的光信号进行光域模数转换和光域数字信号处理。
在一些可选的实现方式中,上述装置还可以包括:光探测器阵列;所述接收端光逻辑器件102,还可设置为将处理后的信号以多路并行低速率的光信号输出至光探测器阵列;所述光探测器阵列,设置为将所述多路并行低速率的光信号转换为多路并行电信号以及将所述多路并行电信号经由所述数据信号接口发送给所述业务板卡。
实际应用中,所述数据信号接口可以为光接口或光电混合的接口。
在一些可选的实现方式中,图1所示的相干光装置还可以包括:发送端光逻辑器件,设置为对来自业务板卡的信号进行处理后发出;所述数据信号接口101,还可设置为将所述业务板卡发来的信号送至所述发送端逻辑器件。
如图2所示,本公开还提供了另一种相干光装置,包括:发送端光逻辑器件103、数据信号接口101;其中,所述数据信号接口101可设置为将所述 业务板卡发来的信号送至所述发送端逻辑器件;所述发送端光逻辑器件103可设置为对来自业务板卡的信号进行处理后发出。
其中,所述发送端光逻辑器件103可设置为对来自业务板卡的信号进行处理,可包括如下之一或其任意组合:
信号/速率转换;
前向纠错编码;
调制码型转换及放大。
在一些可选的实现方式中,上述装置还可以包括:光发射机阵列,设置为对所述数据信号接口发来的多路低速电信号进行电光转换并输出多路并行光信号至所述发送端光逻辑器件。
在一些可选的实现方式中,上述装置还可以包括:接收端光逻辑器件102,设置为对输入的光信号进行光域数据处理并将处理后的信号通过所述数据信号接口发送给业务板卡;所述数据信号接口101,还可设置为将所述接收端光逻辑器件处理后的信号送至业务板卡。
本公开中,使用光学逻辑器件实现数字信号处理、调制码型转换、信号放大、高速模数转换、信号速率转换等功能,可以在高速相干光装置中使用低速率(比如10G,2.5G)多路并行的光探测器或发射机阵列,从而降低成本和功耗;本公开中,相干光装置与业务板卡的数据接口可以采用光接口或光电混合的接口,当使用光接口进行光模块与业务板卡之间的数据传输时,相干光装置的内部将不再需要进行光电及电光转换。
第一实施例
如图3所示,本公开的相干光装置可以包括:接收端光逻辑器件201、数据信号接口202、发送端光逻辑器件203和本振激光器204。
其中,接收端光逻辑器件201(包括光接收口)可与数据信号接口202、本振激光器204连接;数据信号接口202可与接收端光逻辑器件201、发送端光逻辑器件203以及业务板卡连接;发送端光逻辑器件203(包括光发送口)可与数据信号接口202连接,本振激光器204可与接收端光逻辑器件201连接。
所述接收端光逻辑器件201可设置为对来自光接收口的光信号进行光域数据处理,处理的信号后通过数据信号接口202发给业务板卡,接收端光逻辑器件201可以包括光混频、光域模数转换、光域数字信号处理和信号/速率转换等功能模块。
所述数据信号接口202可设置为将相干光装置与业务板卡连接起来,将相干光装置接收的数据发送至业务板卡,同时把业务板卡处理后的数据传送给相干光装置。实际应用中,数据信号接口202可以是单路或多路电信号接口,也可以是单路或多路光信号接口或者是光电混合接口。例如,数据信号接口202可以是下文实施例中的高速数据电接口304、高速数据电接口404、光信号接口503等。
所述发送端光逻辑器件203可设置为对来自业务板卡的信号进行信号/速率转换、纠错编码及调制码型转换、放大等处理后通过光发送口发出。实际应用中,发送端光逻辑器件203可以包含信号/速率转换、前向纠错编码、调制码型转换及放大等功能模块。
所述本振激光器204可设置为提供本振光信号,该本振光信号可以与光接收口的光信号在接收端光逻辑器件201中进行混频。实际应用中,本振激光器204可以为窄线宽可调谐激光器。
本实施例中的相干光装置采用光逻辑器件,大幅降低光模块的功耗,使得功耗不再成为研发400G或更高速率光模块的限制因素;此外,本公开的相干光装置通过低速率多路并行光发射机阵列和多路并行光接收机阵列还将可以用于高速光模块中,从而降低成本。采用光接口进行光模块和业务板卡之间的数据传输,提高数据接口传输速率。本公开的相干光装置不需要使用光发射机和光电探测器,降低了光模块功耗。
第二实施例
本公开的第二实施例如图4所示。该实施例中,相干光装置可以包括光混频器301、接收端光逻辑器件302、光探测器阵列303、高速数据电接口304、激光器305、编码及速率转换芯片306、驱动器307和调制器308等部分。
本实施例中的相干光装置,在接收侧,光接收口收到的光信号可先进入光混频器301与激光器305分束的光信号进行混频,混频后输出多路线偏振 的光信号至接收端光逻辑器件302,接收端光逻辑器件302可对光信号进行模数转换、光域数字信号处理、光域模数转换之后输出多路并行低速率的光信号给光探测器阵列303,光探测器阵列303可将收到的多路并行光信号转换为多路并行电信号以及将多路并行电信号经由高速数据电接口304发送给业务板卡。
本实施例中的相干光装置,在发送侧,高速数据电接口304发来的多路低速电信号可首先进入编码及速率转换芯片306进行预编码、前向纠错编码和速率转换等一系列处理,得到的若干路并行高速电信号可送入驱动器307中进行幅度放大,放大后的电信号可送入调制器308对激光器305发来的光信号进行调制,从而将数据信号加载到光载波上经光发送口送入光纤。
第三实施例
本实施例中相干光装置的结构如图5所示,可以包括光混频器401、接收端光逻辑器件402、光探测器阵列403、高速数据电接口404、光发射机阵列405、发送端光逻辑器件406等部分。
本实施例中的相干光装置,在接收侧,光接收口收到的光信号可先进入光混频器401与光发射机阵列405(任取一路光信号)发来的本振光信号进行混频,混频后可输出多路线偏振的光信号至接收端光逻辑器件402,接收端光逻辑器件402可对所述多路线偏振的光信号进行速率转换、光域数字信号处理、光域模数转换等处理后输出多路并行低速率的光信号至光探测器阵列403,光探测器阵列可将所述多路并行光信号转换为多路并行电信号以及将多路并行电信号经由高速数据电接口404发送给业务板卡。
本实施例中的相干光装置,在发送侧,高速数据电接口404发来的多路低速电信号可首先进入光发射机阵列405进行电光转换输出多路并行的光信号,多路并行光信号送入发送端光逻辑器件406进行速率转换、前向纠错编码和调制码型转换及放大等一系列处理后发送端光逻辑器件406可输出一路高速光信号并将该路高速光信号经由光发送口发给光纤。
第四实施例
本实施例中相干光装置的结构如图6所示,可以包括光混频器501、接收端光逻辑器件502、光信号接口503、发送端光逻辑器件504和本振激光器 505等部分。
本实施例中的相干光装置,在接收侧,光接收口收到的光信号可先进入光混频器501与本振激光器505发来的本振光信号进行混频,混频后可输出多路线偏振的光信号送入接收端光逻辑器件502,接收端光逻辑器件502可对所述多路线偏振的光信号进行速率转换、光域数字信号处理、光域模数转换等处理后输出一路高速或多路并行低速率的光信号并将输出的光信号经由光信号接口503送至业务板卡。
本实施例中的相干光装置,在发送侧,业务板卡通过光信号接口503发来的一路高速或多路低速的光信号可进入发送端光逻辑器件504,发送端光逻辑器件504可对所述一路高速或多路低速的光信号进行速率转换、前向纠错编码和调制码型转换及放大等一系列处理后输出一路高速光信号并将该路高速光信号经由光发送口发给光纤。
第五实施例
本公开的第五实施例如图7所示。该实施例中,相干光装置可以包括集成相干接收机601、电域DSP芯片602、高速数据电接口603、光发射机阵列604和发送端光逻辑器件605等部分。
本实施例中的相干光装置,在接收侧,光接收口收到的光信号可先进入集成相干接收机601与光发射机阵列604分束的光信号进行相干检测和光电转换得到高速电信号,该高速电信号可被送入电域DSP芯片602进行电域模数转换、电域数字信号处理之后输出多路并行低速率的电信号再经由高速数据电接口603发送给业务板卡。
本实施例中的相干光装置,在发送侧,高速数据电接口603发来的多路低速电信号可首先进入光发射机阵列604进行电光转换输出多路并行的光信号,多路并行光信号送入发送端光逻辑器件605进行速率转换、前向纠错编码和调制码型转换及放大等一系列处理后发送端光逻辑器件605可输出一路高速光信号并经由光发送口发出。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件(例如处理器)完成,所述程序可以存储于计算机可读存储介质中,如只读存储器、磁盘或光盘等。可选地,上述实施例的全部或部分 步骤也可以使用一个或多个集成电路来实现。相应地,上述实施例中的每个模块/单元可以采用硬件的形式实现,例如通过集成电路来实现其相应功能,也可以采用软件功能模块的形式实现,例如通过处理器执行存储于存储器中的程序/指令来实现其相应功能。本公开不限制于任何特定形式的硬件和软件的结合。
本领域普通技术人员可以理解,上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施方式中,在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分;例如,一个物理组件可以具有多个功能,或者一个功能或步骤可以由若干物理组件合作执行。某些组件或所有组件可以被实施为由处理器,如数字信号处理器或微处理器执行的软件,或者被实施为硬件,或者被实施为集成电路,如专用集成电路。这样的软件可以分布在计算机可读介质上,计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的,术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于随机存取存储器(RAM,Random Access Memory)、只读存储器(ROM,Read-Only Memory)、电可擦除只读存储器(EEPROM,Electrically Erasable Programmable Read-only Memory)、闪存或其他存储器技术、光盘只读存储器(CD-ROM,Compact Disc Read-Only Memory)、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外,本领域普通技术人员公知的是,通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据,并且可包括任何信息递送介质。
本领域的普通技术人员可以理解,可以对本公开的技术方案进行修改或者等同替换,而不脱离本公开技术方案的精神和范围,均应涵盖在本公开的权利要求范围当中。
本公开实施例中提供一种相干光装置,采用光逻辑器件实现数字信号处理、调制码型转换、信号放大、高速模数转换、信号速率转换等功能,从而突破高速电信号处理的速率瓶颈,可以使用多路并行的低速率光发射机阵列和光探测器阵列,大幅降低光模块的功耗,实现400G、1T以及更高速率的光传输。
本公开中,与业务板卡之间的数据信号接口可以采用光接口或者光电混合接口实现,当使用光接口进行光模块与业务板卡之间的数据传输时,相干光装置的内部将不再需要进行光电及电光转换,有利于相干光装置可以使用多路并行的低速率光发射机阵列和光探测器阵列,从而大幅降低光模块的功耗,实现400G、1T以及更高速率的光传输。
Claims (12)
- 一种相干光装置,包括:接收端光逻辑器件、数据信号接口;其中,所述接收端光逻辑器件设置为:对输入的光信号进行光域信号处理并将处理后的信号送至所述数据信号接口;所述数据信号接口设置为:将所述接收端光逻辑器件处理后的信号送至业务板卡。
- 根据权利要求1所述的相干光装置,其中,所述接收端光逻辑器件设置为对光信号进行光域信号处理,包括如下之一或其任意组合:光混频;光域模数转换;光域数字信号处理;信号/速率转换。
- 根据权利要求2所述的相干光装置,还包括:本振激光器,设置为:提供本振光信号,所述本振光信号用于与输入所述接收端光逻辑器件的光信号进行混频。
- 根据权利要求2所述的相干光装置,还包括:光发射机阵列,设置为:将所述数据信号接口发来的电信号转换成光信号,并从所述光信号中分出一束作为本振光,所述本振光用于与输入所述接收端光逻辑器件的光信号进行混频。
- 根据权利要求3或4所述的相干光装置,其中,还包括:光混频器,设置为:将输入所述光混频器的光信号与所述本振光信号进行混频,并输出多路线偏振的光信号至所述接收端光逻辑器件;所述接收端光逻辑器件,是设置为:对所述多路线偏振的光信号进行光域模数转换和光域数字信号处理。
- 根据权利要求1所述的相干光装置,还包括:光探测器阵列;所述接收端光逻辑器件,还设置为:将处理后的信号以多路并行低速率的光信号输出至光探测器阵列;所述光探测器阵列,设置为:将所述多路并行低速率的光信号转换为多路并行电信号以及将所述多路并行电信号经由所述数据信号接口发送给所述业务板卡。
- 根据权利要求1所述的相干光装置,其中,所述数据信号接口为光接口或光电混合的接口。
- 根据权利要求1至7任一项所述的相干光装置,还包括:发送端光逻辑器件,设置为:对来自业务板卡的信号进行处理后发出;所述数据信号接口,还设置为:将所述业务板卡发来的信号送至所述发送端逻辑器件。
- 一种相干光装置,包括:发送端光逻辑器件、数据信号接口;其中,所述数据信号接口设置为:将所述业务板卡发来的信号送至所述发送端逻辑器件;所述发送端光逻辑器件设置为:对来自业务板卡的信号进行处理后发出。
- 根据权利要求9所述的相干光装置,其中,所述发送端光逻辑器件设置为对来自业务板卡的信号进行处理,包括如下之一或其任意组合:信号/速率转换;前向纠错编码;调制码型转换及放大。
- 根据权利要求9所述的相干光装置,还包括:光发射机阵列,设置为:对所述数据信号接口发来的多路低速电信号进行电光转换并输出多路并行光信号至所述发送端光逻辑器件。
- 根据权利要求9至11任一项所述的相干光装置,还包括:接收端光逻辑器件,设置为:对输入的光信号进行光域数据处理并将处理后的信号通过所述数据信号接口发送给业务板卡;所述数据信号接口,还设置为:将所述接收端光逻辑器件处理后的信号送至业务板卡。
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