CN117270108A - 一种基于微环谐振腔的多路宽带随机信号产生装置 - Google Patents

一种基于微环谐振腔的多路宽带随机信号产生装置 Download PDF

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CN117270108A
CN117270108A CN202310582962.1A CN202310582962A CN117270108A CN 117270108 A CN117270108 A CN 117270108A CN 202310582962 A CN202310582962 A CN 202310582962A CN 117270108 A CN117270108 A CN 117270108A
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resonant cavity
ring resonant
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李璞
李琦智
邢彦霖
蔡强
唐文烨
徐兵杰
秦玉文
王云才
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Guangdong University of Technology
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    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
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    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/105—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type having optical polarisation effects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
    • G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G—PHYSICS
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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
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    • G02F1/395—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves in optical waveguides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
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    • G02B2006/12164—Multiplexing; Demultiplexing

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Abstract

本发明属于通信技术领域，具体涉及到一种基于微环谐振腔的多路宽带随机信号产生装置，包括超辐射发光二极管、掺铒光纤放大器、偏振控制器、微环谐振腔和波分复用器。其特征是：超辐射发光二极管发出的放大自发辐射噪声经掺铒光纤放大器放大到一定功率后泵浦微环谐振腔，在微环谐振腔的环形波导中发生四波混频、自相位调制、交叉相位调制、受激拉曼散射以及色散的联合作用，经微环谐振腔下载端输出后将产生具有n个梳齿的光频梳，进而利用波分复用器将n个梳齿解复用，最终产生n路高带宽的随机信号。本发明解决了多路宽带随机信号难以实现的问题，可应用于通信系统、雷达和密码学等领域。

Description

一种基于微环谐振腔的多路宽带随机信号产生装置
技术领域
本发明涉及一种基于微环谐振腔的多路宽带随机信号产生装置，属于密码学、通信、信息安全等领域。
背景技术
随机信号已被广泛应用于保密通信、雷达以及密码学等领域。在保密通信领域，随机信号作为掩藏信息的载波；在雷达领域，随机信号作为发射信号，可以使雷达系统具备优异的低截获概率性能和电子反对抗能力；在密码学领域，随机信号源可作为物理随机数产生的熵源。
当前，大多数随机信号产生装置是基于电子随机过程产生的，典型的电子随机信号产生装置利用电阻热噪声，环形振荡器的相位抖动，电路亚稳态和混沌电路等来实现。然而传统的电子随机信号产生装置生成的随机信号的带宽仅为MHz量级，远无法满足目前的应用需求。此外，电子随机信号产生装置往往需要利用电放大器对输出的随机信号进行放大，导致整个系统相对复杂，而且电子随机信号随着带宽增加，其输出功率谱的平坦度变差。
利用光学随机过程来构建随机信号产生装置可以突破电子带宽的瓶颈，实现宽带的随机信号产生。典型的光学随机信号产生装置利用激光器相位噪声，放大的自发辐射噪声以及混沌激光等来实现。例如，基于垂直腔面发射激光器的相位噪声可以产生近1GHz的光学随机信号[Physical Review E，2010，81(5)，051137]；利用超辐射发光二极管结合光电转换器件也可以产生宽带随机信号，带宽达约12GHz[Optics Letters，2011，36(6)，1020-1022]；利用带有外部反馈的半导体激光器产生的混沌激光作为光学随机信号源，其带宽约为1.7GHz[Nature Photonics，2008，2(12)，728-732]。相比于电随机信号，以上光学随机信号在带宽上得到了极大增强。然而，上述光学随机信号产生装置通常只能输出单路或双路随机信号，无法满足当前应用对于多路并行化的需求，如多路保密通信、多目标雷达探测以及多路并行蒙特卡洛仿真等。
综上所述，为了同时满足当前应用对于高带宽和并行化的需求，发展一种新型的多路宽带随机信号产生装置是十分必要的。
发明内容
本发明的目的在于，提供一种基于微环谐振腔的多路宽带随机信号产生装置，已解决上述现有技术中存在的多路并行的宽带随机信号难以实现的问题。
本发明所提供的一种基于微环谐振腔的多路宽带随机信号产生装置，包括依次连接的超辐射发光二极管、掺铒光纤放大器、偏振控制器、微环谐振腔和波分复用器。其中，超辐射发光二极管发出放大的自发辐射(ASE)噪声输入至掺铒光纤放大器进行放大；掺铒光纤放大器将ASE噪声放大到一定功率后，经过偏振控制器调节偏振态后注入到微环谐振腔中。放大后的ASE噪声在微环谐振腔中发生四波混频、自相位调制、交叉相位调制、受激拉曼散射及色散的联合作用，光谱发生极大展宽。微环谐振腔的下载端口将输出具有n个频率间距相等的梳齿的调制不稳定状态的光频梳。最后经过波分复用器将该光频梳的n个梳齿解复用为n路高带宽的随机信号。
本发明所述的一种基于微环谐振腔的多路宽带随机信号产生装置中，超辐射发光二极管的中心波长需小于距离其最近的谐振频率对应的波长，即泵浦波长要位于微环谐振腔谐振峰的蓝失谐处。
本发明所述的一种基于微环谐振腔的多路宽带随机信号产生装置中，波分复用器的输出信道数量等于微环谐振腔下载端输出的光频梳的梳齿数量。
本发明所述的一种基于微环谐振腔的多路宽带随机信号产生装置中，波分复用器的信道带宽应大于光频梳的单个梳齿线宽。
实现上述本发明所提供的一种基于微环谐振腔的多路宽带随机信号产生装置中，其优点和积极效果在于：
1、该技术方案利用光学方法产生了宽带随机信号，突破了电子带宽瓶颈，其频谱带宽可增加2～3个数量级；
2、该技术方案产生的宽带随机信号的路数可以进一步拓展，通过提高掺铒光纤放大器的放大功率或者使用非线性系数更高的微环谐振腔，可以进一步增加光频梳的梳齿个数，实现更多路数的宽带随机信号产生；
3、该技术方案输出随机信号的功率取决于掺铒光纤放大器的放大功率，相比于现有电子随机信号产生装置来讲，其输出功率易于调节且可输出的最大功率更大。
附图说明
图1为本发明提供的一种基于微环谐振腔的多路宽带随机信号产生装置的结构示意图。
图2为本发明提供的一种基于微环谐振腔的多路宽带随机信号产生装置中微环谐振腔下载端的传输特性曲线图。
图3为本发明提供的一种基于微环谐振腔的多路宽带随机信号产生装置中微环谐振腔下载端输出的光频梳的典型光谱图。
图4为将图3的光频梳的光谱滤出单个梳齿后测得的典型频谱图。
具体实施方式
下面结合附图对本发明的技术措施进行详细描述，以使本领域的技术人员对本发明的目的、优势以及技术措施有更加清晰的认识。基于本发明中的实施案例，本专业其他技术人员在没有进行过创造性劳动的情况下所取得的任何其他的实施例，均可划归为本发明的保护范畴。
本发明所提供的一种基于微环谐振腔的多路宽带随机信号产生装置，包括超辐射发光二极管1、掺铒光纤放大器2、偏振控制器3、微环谐振腔4和波分复用器5。其中，超辐射发光二极管1发出的放大自发辐射(ASE)噪声输入至掺铒光纤放大器2进行放大；掺铒光纤放大器2将ASE噪声放大到一定功率后，经过偏振控制器3调节偏振态后注入到微环谐振腔4中。放大后的ASE噪声在微环谐振腔4中发生四波混频、自相位调制、交叉相位调制、受激拉曼散射及色散的联合作用，光谱发生极大展宽。微环谐振腔4的下载端口将输出具有n个频率间距相等的梳齿的调制不稳定状态的光频梳。最后经过波分复用器5将该光频梳的n个梳齿解复用为n路高带宽的随机信号。
具体实施时，如附图1所示的超辐射发光二极管1输出中心波长为1053nm，光谱线宽为30nm的ASE噪声，掺铒光纤放大器2将ASE噪声信号放大到10W，放大后的信号经偏振控制器3调节偏振态后注入微环谐振腔4。如图2所示，该微环谐振腔4的谐振线宽为0.3nm，且其非线性系数为1W-1m-1，距离泵浦光最近的谐振波长为1053.02nm。ASE噪声信号在微环谐振腔4中首先受到四波混频作用导致时序被压缩成多个短脉冲信号，短脉冲信号经过自相位调制，拉曼散射和高阶色散作用进一步分裂为光孤子，使得光谱向长波长处发生展宽。同时，光孤子在高阶色散等的微扰下产生色散波，色散波的出现使得光谱向短波长处发生展宽。孤子与色散波之间的交叉相位调制作用使得光谱短波长处进一步展宽。综上所述，微环中出现的非线性效应与色散的联合作用导致了原始混沌激光产生许多新的频率成分，从而使得光谱范围发生极大展宽，下载端口输出最终信号的光谱则表现为出现一系列相同频率间距的梳齿，如图3所示。图中0模代表泵浦光波长对应的梳齿，其两侧对称分布着m个梳齿，m的值可达100以上。进而，信道带宽0.3nm、信道数量为n的波分复用器5将产生的光频梳解复用为n路高带宽的随机信号(n＝2m+1)。如图4所示，测得的每路宽带随机信号的频谱-3dB带宽达50GHz。
需要特别指出的是，本发明实现的宽带随机信号的输出功率可通过调节掺铒光纤放大器2的放大功率来调整。此外，本发明产生多路宽带随机信号的数量与掺铒光纤放大器2的放大功率以及微环谐振腔4的非线性系数有关，可以通过调节放大功率或更换其他非线性系数的微环谐振腔4实现不同路数的宽带随机信号，以应用于多目标雷达探测、多路高速保密通信、多通道随机数产生等领域。
上述说明仅仅为本发明技术措施的详尽描述，以便于本领域的技术人员理解，但绝非对本发明的保护范围有所限制，对于本技术领域的技术人员而言，以各种等效形式或等效方法进行直接或间接地运用于其他相关科学技术方面，同样属于对本发明的专利保护范畴。

Claims (4)

1.一种基于微环谐振腔的多路宽带随机信号产生装置，包括依次连接的超辐射发光二极管、掺铒光纤放大器、偏振控制器、微环谐振腔和波分复用器；其中，超辐射发光二极管发出的放大自发辐射(ASE)噪声输入至掺铒光纤放大器进行放大；掺铒光纤放大器将ASE噪声放大到一定功率后，经过偏振控制器调节偏振态后注入到微环谐振腔中；放大后的ASE噪声在微环谐振腔中发生四波混频、自相位调制、交叉相位调制、受激拉曼散射及色散的联合作用，光谱发生极大展宽；微环谐振腔的下载端口将输出具有n个频率间距相等的梳齿的调制不稳定状态的光频梳；最后经过波分复用器将该光频梳的n个梳齿解复用为n路高带宽的随机信号。
2.由权利要求1所述的一种基于微环谐振腔的多路宽带随机信号产生装置，其特征在于：超辐射发光二极管的中心波长需小于距离其最近的谐振频率对应的波长，即泵浦波长要位于微环谐振腔谐振峰的蓝失谐处。
3.由权利要求1所述的一种基于微环谐振腔的多路宽带随机信号产生装置，其特征在于：波分复用器的输出信道数量等于微环谐振腔下载端输出的光频梳的梳齿数量。
4.由权利要求1所述的一种基于微环谐振腔的多路宽带随机信号产生装置，其特征在于：波分复用器的信道带宽应大于光频梳的单个梳齿线宽。
CN202310582962.1A 2023-05-22 2023-05-22 一种基于微环谐振腔的多路宽带随机信号产生装置 Pending CN117270108A (zh)

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