CN111555809B - Photo-generated millimeter wave noise generator - Google Patents

Photo-generated millimeter wave noise generator Download PDF

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CN111555809B
CN111555809B CN202010236879.5A CN202010236879A CN111555809B CN 111555809 B CN111555809 B CN 111555809B CN 202010236879 A CN202010236879 A CN 202010236879A CN 111555809 B CN111555809 B CN 111555809B
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李璞
李玮
王云才
蔡强
贾志伟
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Taiyuan University of Technology
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    • H—ELECTRICITY
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • 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
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Abstract

本发明涉及一种光生毫米波噪声发生器，包括依序连接的混沌激光器，掺铒光纤放大器，第二偏振控制器，高非线性光纤（HNLF）以及高速光电探测器；其中，混沌激光器由半导体激光器，第一偏振控制器，60:40光纤耦合器，可调光衰减器以及光纤反射镜构成。本发明方案提供了一种毫米波噪声的光学产生技术，突破了电子带宽的瓶颈，实现方案结构简单且易于产生更大带宽的毫米波噪声；本发明的技术方案输出毫米波噪声的功率取决于掺铒光纤放大器的放大功率，相比于现有电子噪声源来讲，其输出功率易于调节而且可输出的最大功率更大；本发明的技术方案是由利用高非线性光纤中非线性效应及色散等联合作用实现毫米波噪声的产生，其产生毫米波噪声的频谱平坦，带宽更大。

Figure 202010236879

The invention relates to an optically-generated millimeter-wave noise generator, comprising a chaotic laser connected in sequence, an erbium-doped fiber amplifier, a second polarization controller, a highly nonlinear fiber (HNLF) and a high-speed photodetector; wherein the chaotic laser is composed of a semiconductor A laser, a first polarization controller, a 60:40 fiber coupler, an adjustable optical attenuator and a fiber mirror. The scheme of the present invention provides an optical generation technology of millimeter-wave noise, which breaks through the bottleneck of electronic bandwidth, and the realization scheme has a simple structure and is easy to generate millimeter-wave noise with a larger bandwidth; the power of the technical scheme of the present invention to output millimeter-wave noise depends on Compared with the existing electronic noise source, the amplification power of the erbium-doped fiber amplifier is easy to adjust and the maximum output power is larger; the technical solution of the present invention is to utilize the nonlinear effect and the The combined effect of dispersion and other factors realizes the generation of millimeter wave noise, which has a flat spectrum and wider bandwidth.

Figure 202010236879

Description

一种光生毫米波噪声发生器A Photogenerated Millimeter Wave Noise Generator

技术领域technical field

本发明涉及信息安全技术领域，具体是一种光生毫米波噪声发生器。The invention relates to the technical field of information security, in particular to an optically generated millimeter wave noise generator.

背景技术Background technique

在雷达系统，通信系统、武器制导系统中，都需要用可控噪声源来检测系统中的抗噪声干扰能力。因此，噪声发生器是设备性能分析与标定的重要仪器。在通信和控制系统中，往往需要利用噪声发生器来对电子设备的抗干扰性能进行测试，尤其是功率密度均匀的毫米波噪声。因此，如何产生输出功率连续可控、噪声功率谱密度均匀平坦的毫米波噪声信号已经成为一个重要的研究领域。In radar systems, communication systems, and weapon guidance systems, it is necessary to use controllable noise sources to test the anti-noise interference capabilities of the systems. Therefore, the noise generator is an important instrument for equipment performance analysis and calibration. In communication and control systems, it is often necessary to use noise generators to test the anti-interference performance of electronic equipment, especially millimeter-wave noise with uniform power density. Therefore, how to generate millimeter-wave noise signals with continuously controllable output power and uniform and flat noise power spectral density has become an important research field.

现有的噪声发生器通常分为数字合成技术和物理器件噪声放大技术两类。其中，数字合成技术是利用DSP或FPGA，通过线性同余法、移存器法等算法先产生一段伪随机数序列，再将伪随机数序列进行时域-频率映射转化为噪声。该实现电路较为简单，便于实用，但是受限于器件的时钟频率，数学合成技术产生的噪声频率往往低于GHz，而且精度较差。物理器件噪声放大技术是将电阻、饱和二极管、气体放电二极管、肖特基二极管、场效应晶体管等物理器件中的噪声进行控制与放大，进而产生实际可用的噪声。利用该技术可以产生较大带宽的噪声，而且精度比较高，但是其实现电路往往需要放大，较为复杂，而且随着带宽的增加，其输出噪声功率平坦度变差。Existing noise generators are generally divided into two categories: digital synthesis technology and physical device noise amplification technology. Among them, digital synthesis technology uses DSP or FPGA to first generate a pseudo-random number sequence through algorithms such as linear congruence method and register shift method, and then converts the pseudo-random number sequence into noise through time domain-frequency mapping. The implementation circuit is relatively simple, convenient and practical, but limited by the clock frequency of the device, the noise frequency generated by the mathematical synthesis technology is often lower than GHz, and the accuracy is poor. Physical device noise amplification technology is to control and amplify the noise in physical devices such as resistors, saturated diodes, gas discharge diodes, Schottky diodes, and field effect transistors, and then generate practical noise. Using this technology can generate noise with a larger bandwidth, and the accuracy is relatively high, but its implementation circuit often needs to be amplified, which is more complicated, and with the increase of the bandwidth, the flatness of the output noise power becomes worse.

然而，现有噪声发生器的工作频率已经不能满足一些高频器件的工作频率。如何在非常宽的频率范围（数百GHz）内输出频谱平坦、功率稳定可控的连续随机噪声信号，存在着原理、技术、工艺等诸多层面的困难。因此，实现一种新型高带宽、频谱密度均匀、输出功率可调毫米波噪声产生迫在眉睫。However, the operating frequency of existing noise generators cannot meet the operating frequency of some high-frequency devices. How to output a continuous random noise signal with flat spectrum and stable and controllable power in a very wide frequency range (hundreds of GHz), there are many difficulties in principles, technologies, and processes. Therefore, it is imminent to realize a new type of millimeter-wave noise generation with high bandwidth, uniform spectral density, and adjustable output power.

发明内容Contents of the invention

本发明要解决的技术问题在于，针对现有技术的上述缺陷，提供一种光生毫米波噪声发生器。The technical problem to be solved by the present invention is to provide an optically-generated millimeter-wave noise generator for the above-mentioned defects of the prior art.

本发明解决其技术问题所采用的技术方案是：构造一种光生毫米波噪声发生器，包括依序连接的混沌激光器，掺铒光纤放大器，第二偏振控制器，高非线性光纤（HNLF）以及高速光电探测器；其中，混沌激光器由半导体激光器，第一偏振控制器，60:40光纤耦合器，可调光衰减器以及光纤反射镜构成，半导体激光器，第一偏振控制器，60:40光纤耦合器依序连接，可调光衰减器一端连接光纤反射镜，另一端连接60:40光纤耦合器；60:40光纤耦合器连接掺铒光纤放大器；The technical solution adopted by the present invention to solve its technical problems is: to construct a kind of optically-generated millimeter-wave noise generator, including a chaotic laser connected in sequence, an erbium-doped fiber amplifier, a second polarization controller, a highly nonlinear fiber (HNLF) and High-speed photodetector; among them, the chaotic laser is composed of semiconductor laser, first polarization controller, 60:40 fiber coupler, adjustable optical attenuator and fiber mirror, semiconductor laser, first polarization controller, 60:40 optical fiber The couplers are connected in sequence, one end of the adjustable optical attenuator is connected to the fiber reflector, and the other end is connected to the 60:40 fiber coupler; the 60:40 fiber coupler is connected to the erbium-doped fiber amplifier;

其中，混沌激光器的半导体激光器输出的激光经过第一偏振控制器后，由分光比60:40的光纤耦合器分为两路，其中40%端口连接可调光衰减器和光纤反射镜，形成反馈结构；可调光衰减器和第一偏振控制器使反馈光在适当的强度和偏振态下返回至半导体激光器内部对其进行扰动，使其工作在混沌振荡状态，产生的混沌激光由光纤耦合器的60%端口输出；混沌激光在经过掺铒光纤放大器放大到一定功率时经第二偏振控制器输入高非线性光纤，由高速光电探测器进行光电转换后输出最终结果；由于原始混沌激光信号放大后进入高非线性光纤中，发生非线性效应及色散的联合作用，其光谱发生显著展宽，同时其频谱带宽得到增强，最终的输出呈现出毫米波噪声的频谱特性，实现毫米波噪声的产生。Among them, the laser output from the semiconductor laser of the chaotic laser passes through the first polarization controller, and is divided into two paths by a fiber coupler with a split ratio of 60:40, and 40% of the ports are connected to an adjustable optical attenuator and a fiber optic mirror to form a feedback Structure; the adjustable optical attenuator and the first polarization controller make the feedback light return to the inside of the semiconductor laser to disturb it under the appropriate intensity and polarization state, so that it works in a chaotic oscillation state, and the chaotic laser generated by the fiber coupler 60% of the port output; the chaotic laser is amplified to a certain power by the erbium-doped fiber amplifier and is input into the high nonlinear fiber through the second polarization controller, and the final result is output after the photoelectric conversion by the high-speed photodetector; due to the original chaotic laser signal amplification After entering the highly nonlinear optical fiber, the combined effect of nonlinear effect and dispersion occurs, and its spectrum is significantly broadened, and its spectral bandwidth is enhanced. The final output presents the spectral characteristics of millimeter wave noise, realizing the generation of millimeter wave noise.

在本发明所述的光生毫米波噪声发生器中，混沌激光器通过光反馈实现混沌激光产生，是混沌激光产生的最简单的结构。In the optically-generated millimeter-wave noise generator of the present invention, the chaotic laser realizes chaotic laser generation through optical feedback, and is the simplest structure for chaotic laser generation.

在本发明所述的光生毫米波噪声发生器中，掺铒光纤放大器用于实现原始混沌激光的放大以及最终产生毫米波噪声的功率调节。In the optically-generated millimeter-wave noise generator of the present invention, the erbium-doped fiber amplifier is used to realize the amplification of the original chaotic laser and the power adjustment of the finally generated millimeter-wave noise.

在本发明所述的光生毫米波噪声发生器中，高非线性光纤的非线性系数大于10W-1km-1，混沌激光经过高非线性光纤后，发生非线性效应以及色散作用，实现混沌光谱展宽，混沌信号的带宽的得到增强，最终输出频谱平坦的毫米波噪声。In the optically-generated millimeter-wave noise generator of the present invention, the nonlinear coefficient of the highly nonlinear optical fiber is greater than 10W -1 km -1 , and after the chaotic laser passes through the highly nonlinear optical fiber, nonlinear effects and dispersion effects occur to realize chaotic spectrum Broadening, the bandwidth of the chaotic signal is enhanced, and finally output the millimeter-wave noise with flat spectrum.

实现上述本发明所提供的一种光生毫米波噪声发生器，其优点与积极效果在于：本发明提出了一种毫米波噪声的光学产生技术，突破了电子带宽的瓶颈，实现方案结构简单且易于产生更大带宽的毫米波噪声；本发明的技术方案输出毫米波噪声的功率取决于掺铒光纤放大器的放大功率，相比于现有电子噪声源来讲，其输出功率易于调节而且可输出的最大功率更大；本发明的技术方案是由利用高非线性光纤中非线性效应及色散等联合作用实现毫米波噪声的产生，其产生毫米波噪声的频谱平坦，带宽更大。The advantages and positive effects of realizing the above-mentioned optically generated millimeter wave noise generator provided by the present invention are: the present invention proposes an optical generation technology of millimeter wave noise, which breaks through the bottleneck of electronic bandwidth, and the realization scheme is simple in structure and easy to use. Generate millimeter-wave noise with larger bandwidth; the power of the technical solution output millimeter-wave noise of the present invention depends on the amplification power of the erbium-doped fiber amplifier, compared with the existing electronic noise source, its output power is easy to adjust and can output The maximum power is higher; the technical solution of the present invention realizes the generation of millimeter-wave noise by using the combined effects of nonlinear effects and dispersion in highly nonlinear optical fibers, and the spectrum of the millimeter-wave noise generated by it is flat and the bandwidth is larger.

附图说明Description of drawings

下面将结合附图及实施例对本发明作进一步说明，附图中：The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

图1是本发明提供的一种光生毫米波噪声发生器的结构示意图。Fig. 1 is a schematic structural diagram of an optically-generated millimeter-wave noise generator provided by the present invention.

图2是本发明提供的一种光生毫米波噪声发生器的实验结果图。Fig. 2 is a graph of experimental results of an optically-generated millimeter-wave noise generator provided by the present invention.

图中：1：半导体激光器；2：第一偏振控制器；3：60:40光纤耦合器，4：可调光衰减器；5：光纤反射镜；6：掺铒光纤放大器；7：第二偏振控制器；8：高非线性光纤（HNLF）；9：高速光电探测器。In the figure: 1: semiconductor laser; 2: first polarization controller; 3: 60:40 fiber coupler, 4: adjustable optical attenuator; 5: fiber mirror; 6: erbium-doped fiber amplifier; 7: second Polarization controller; 8: highly nonlinear fiber (HNLF); 9: high-speed photodetector.

具体实施方式Detailed ways

为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

如图1所示，在本发明的光生毫米波噪声发生器包括包括依序连接的混沌激光器，掺铒光纤放大器6，第二偏振控制器7，高非线性光纤（HNLF）8以及高速光电探测器9；其中，混沌激光器由半导体激光器1，第一偏振控制器2，60:40光纤耦合器3，可调光衰减器4以及光纤反射镜5构成，半导体激光器1，第一偏振控制器2，60:40光纤耦合器3依序连接，可调光衰减器4一端连接光纤反射镜5，另一端连接60:40光纤耦合器3；60:40光纤耦合器3连接掺铒光纤放大器6；As shown in Figure 1, the optically-generated millimeter-wave noise generator of the present invention includes a chaotic laser connected in sequence, an erbium-doped fiber amplifier 6, a second polarization controller 7, a highly nonlinear fiber (HNLF) 8 and a high-speed photodetector device 9; wherein, the chaotic laser is composed of semiconductor laser 1, first polarization controller 2, 60:40 fiber coupler 3, adjustable optical attenuator 4 and fiber optic mirror 5, semiconductor laser 1, first polarization controller 2 , the 60:40 fiber coupler 3 is connected in sequence, one end of the adjustable optical attenuator 4 is connected to the fiber mirror 5, and the other end is connected to the 60:40 fiber coupler 3; the 60:40 fiber coupler 3 is connected to the erbium-doped fiber amplifier 6;

其中，混沌激光器的半导体激光器1输出的激光经过第一偏振控制器2后，由分光比 60:40的光纤耦合器3分为两路，其中40%端口连接可调光衰减器4和光纤反射镜5，形成反馈结构；可调光衰减器4和第一偏振控制器3使反馈光在适当的强度和偏振态下返回至半导体激光器1内部对其进行扰动，使其工作在混沌振荡状态，产生的混沌激光由光纤耦合器3的60%端口输出；混沌激光在经过掺铒光纤放大器6放大到一定功率时经第二偏振控制器7输入高非线性光纤8，由高速光电探测器9进行光电转换后输出最终结果；由于原始混沌激光信号放大后进入高非线性光纤8中，发生非线性效应及色散的联合作用，其光谱发生显著展宽，同时其频谱带宽得到增强，最终的输出呈现出毫米波噪声的频谱特性，实现毫米波噪声的产生。Among them, the laser light output by the semiconductor laser 1 of the chaotic laser passes through the first polarization controller 2, and is divided into two paths by the fiber coupler 3 with a split ratio of 60:40, and 40% of the ports are connected to the adjustable optical attenuator 4 and the optical fiber reflection The mirror 5 forms a feedback structure; the adjustable optical attenuator 4 and the first polarization controller 3 make the feedback light return to the inside of the semiconductor laser 1 under appropriate intensity and polarization state to disturb it, so that it works in a chaotic oscillation state, The generated chaotic laser is output by the 60% port of the fiber coupler 3; when the chaotic laser is amplified to a certain power through the erbium-doped fiber amplifier 6, it is input into the high nonlinear optical fiber 8 through the second polarization controller 7, and is detected by the high-speed photodetector 9. The final result is output after photoelectric conversion; since the original chaotic laser signal is amplified and enters the highly nonlinear optical fiber 8, the combined effect of nonlinear effect and dispersion occurs, and its spectrum is significantly broadened, and its spectral bandwidth is enhanced at the same time, and the final output shows Spectrum characteristics of millimeter wave noise to realize the generation of millimeter wave noise.

在本发明所述的光生毫米波噪声发生器中，混沌激光器通过光反馈实现混沌激光产生，是混沌激光产生的最简单的结构。In the optically-generated millimeter-wave noise generator of the present invention, the chaotic laser realizes chaotic laser generation through optical feedback, and is the simplest structure for chaotic laser generation.

在本发明所述的光生毫米波噪声发生器中，掺铒光纤放大器6用于实现原始混沌激光的放大以及最终产生毫米波噪声的功率调节。In the optically-generated millimeter-wave noise generator of the present invention, the erbium-doped fiber amplifier 6 is used to realize the amplification of the original chaotic laser and the power adjustment of the finally generated millimeter-wave noise.

在本发明所述的光生毫米波噪声发生器中，高非线性光纤8的非线性系数大于10W-1km-1，混沌激光经过高非线性光纤后，发生非线性效应以及色散作用，实现混沌光谱展宽，混沌信号的带宽的得到增强，最终输出频谱平坦的毫米波噪声。In the optically-generated millimeter-wave noise generator of the present invention, the nonlinear coefficient of the highly nonlinear optical fiber 8 is greater than 10W -1 km -1 , and after the chaotic laser passes through the highly nonlinear optical fiber, nonlinear effects and dispersion effects occur to realize chaotic The spectrum is broadened, the bandwidth of the chaotic signal is enhanced, and the millimeter-wave noise with a flat spectrum is finally output.

具体实施时，半导体激光器1输出中心波长为1550.200 nm激光，经过第一偏振控制器 2后，由分光比 60:40 的光纤耦合器3分为两路，其中40%端与可调光衰减器4和光纤反射镜5相连接，形成反馈结构。调节可调光衰减器4和第一偏振控制器 5使反馈光在适当的强度和偏振态下返回至激光器内部对其进行扰动，使其工作在混沌振荡状态，产生的混沌激光由光纤耦合器的60%端口输出。输出的混沌激光在经过掺铒光纤放大器6放大到1W及以上时，由第二偏振控制器7调节混沌激光的偏振状态后输入长度2 km，非线性系数为10W-1km-1，零色散波长为1550 nm高非线性光纤8。由于高非线性光纤8中各类非线性效应及色散的联合作用，连续光信号的光谱会很容易地发生显著展宽，同时其频谱带宽的得到极大增强，最终的输出可呈现出毫米波噪声的频谱特性，实现有效带宽高达数百GHz的毫米波噪声的产生。最终的结果如图2所示，与原始混沌激光的频谱带宽相比，经过高非线性光纤8后输出的毫米波噪声信号带宽得到极大提升且频谱平坦（受限于高速光电探测器、频谱仪测试带宽的限制，实验上仅给出了带宽50 GHz的结果）。During specific implementation, the semiconductor laser 1 outputs laser light with a central wavelength of 1550.200 nm. After passing through the first polarization controller 2, it is divided into two paths by the fiber coupler 3 with a split ratio of 60:40, of which 40% end is connected to the adjustable optical attenuator. 4 is connected with the fiber mirror 5 to form a feedback structure. Adjust the adjustable optical attenuator 4 and the first polarization controller 5 so that the feedback light returns to the inside of the laser at an appropriate intensity and polarization state to disturb it, so that it works in a chaotic oscillation state, and the chaotic laser generated by the fiber coupler 60% of the port output. When the output chaotic laser is amplified to 1W or above by the erbium-doped fiber amplifier 6, the polarization state of the chaotic laser is adjusted by the second polarization controller 7, and the input length is 2 km, the nonlinear coefficient is 10W -1 km -1 , and zero dispersion The wavelength is 1550 nm high nonlinear fiber 8. Due to the combination of various nonlinear effects and dispersion in the highly nonlinear optical fiber 8, the spectrum of the continuous optical signal can easily be significantly broadened, and its spectral bandwidth is greatly enhanced, and the final output can show millimeter wave noise Spectrum characteristics, realize the generation of millimeter wave noise with effective bandwidth up to hundreds of GHz. The final result is shown in Figure 2. Compared with the spectral bandwidth of the original chaotic laser, the bandwidth of the millimeter-wave noise signal output after passing through the highly nonlinear optical fiber 8 is greatly improved and the spectrum is flat (limited by high-speed photodetectors, spectrum Due to the limitation of the test bandwidth of the instrument, the experiment only gives the result of a bandwidth of 50 GHz).

需要特别指出的是，提高掺铒光纤放大器6的放大功率、使用非线性系数更高的高非线性光纤8以及增加高非线性光纤8的长度均可以进一步提高最终产生毫米波噪声的带宽以及频谱平坦度。此外，通过调节掺铒光纤放大器6的放大功率可以实现最终输出毫米波噪声的功率调节。因此，本发明所公开的一种光生毫米波噪声发生器所产生的毫米波噪声带宽大（理论上可达数百GHz）、频谱平坦且功率可调。It should be pointed out that increasing the amplification power of the erbium-doped fiber amplifier 6, using a highly nonlinear optical fiber 8 with a higher nonlinear coefficient, and increasing the length of the highly nonlinear optical fiber 8 can further improve the bandwidth and frequency spectrum of the final millimeter-wave noise. flatness. In addition, by adjusting the amplification power of the erbium-doped fiber amplifier 6, the power adjustment of the final output millimeter wave noise can be realized. Therefore, the millimeter-wave noise generated by the optically-generated millimeter-wave noise generator disclosed in the present invention has a wide bandwidth (up to hundreds of GHz in theory), a flat frequency spectrum, and adjustable power.

实现上述本发明所提供的一种光生毫米波噪声发生器，其优点与积极效果在于：本发明提出了一种毫米波噪声的光学产生技术，突破了电子带宽的瓶颈，实现方案结构简单且易于产生更大带宽的毫米波噪声；本发明的技术方案输出毫米波噪声的功率取决于掺铒光纤放大器的放大功率，相比于现有电子噪声源来讲，其输出功率易于调节而且可输出的最大功率更大；本发明的技术方案是由利用高非线性光纤中非线性效应及色散等联合作用实现毫米波噪声的产生，其产生毫米波噪声的频谱平坦，带宽更大。The advantages and positive effects of realizing the above-mentioned optically generated millimeter wave noise generator provided by the present invention are: the present invention proposes an optical generation technology of millimeter wave noise, which breaks through the bottleneck of electronic bandwidth, and the realization scheme is simple in structure and easy to use. Generate millimeter-wave noise with larger bandwidth; the power of the technical solution output millimeter-wave noise of the present invention depends on the amplification power of the erbium-doped fiber amplifier, compared with the existing electronic noise source, its output power is easy to adjust and can output The maximum power is higher; the technical solution of the present invention realizes the generation of millimeter-wave noise by using the combined effects of nonlinear effects and dispersion in highly nonlinear optical fibers, and the spectrum of the millimeter-wave noise generated by it is flat and the bandwidth is larger.

上面结合附图对本发明的实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本发明的保护之内。Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.

Claims (4)

1.一种光生毫米波噪声发生器，其特征在于，包括：依序连接的混沌激光器，掺铒光纤放大器，第二偏振控制器，高非线性光纤(HNLF)以及高速光电探测器；其中，混沌激光器由半导体激光器，第一偏振控制器，60:40光纤耦合器，可调光衰减器以及光纤反射镜构成，半导体激光器，第一偏振控制器，60:40光纤耦合器依序连接，可调光衰减器一端连接光纤反射镜，另一端连接60:40光纤耦合器；60:40光纤耦合器连接掺铒光纤放大器；1. a light-generated millimeter-wave noise generator, is characterized in that, comprises: the chaotic laser device connected in sequence, the erbium-doped fiber amplifier, the second polarization controller, highly nonlinear optical fiber (HNLF) and high-speed photodetector; Wherein, The chaotic laser is composed of a semiconductor laser, a first polarization controller, a 60:40 fiber coupler, an adjustable optical attenuator, and a fiber optic mirror. The semiconductor laser, the first polarization controller, and a 60:40 fiber coupler are connected in sequence. One end of the dimming attenuator is connected to a fiber optic reflector, and the other end is connected to a 60:40 fiber coupler; the 60:40 fiber coupler is connected to an erbium-doped fiber amplifier; 其中，混沌激光器的半导体激光器输出的激光经过第一偏振控制器后，由分光比60:40的光纤耦合器分为两路，其中40％端口连接可调光衰减器和光纤反射镜，形成反馈结构；可调光衰减器和第一偏振控制器使反馈光在适当的强度和偏振态下返回至半导体激光器内部对其进行扰动，使其工作在混沌振荡状态，产生的混沌激光由光纤耦合器的60％端口输出；混沌激光在经过掺铒光纤放大器放大到功率达到1W及以上时经第二偏振控制器输入高非线性光纤，由高速光电探测器进行光电转换后输出最终结果；由于原始混沌激光信号放大后进入高非线性光纤中，发生非线性效应及色散的联合作用，其光谱发生显著展宽，同时其频谱带宽得到增强，最终的输出呈现出毫米波噪声的频谱特性，实现毫米波噪声的产生。Among them, the laser output from the semiconductor laser of the chaotic laser passes through the first polarization controller, and is divided into two paths by a fiber coupler with a split ratio of 60:40, and 40% of the ports are connected to an adjustable optical attenuator and a fiber optic mirror to form a feedback Structure; the adjustable optical attenuator and the first polarization controller make the feedback light return to the inside of the semiconductor laser to disturb it under the appropriate intensity and polarization state, so that it works in a chaotic oscillation state, and the chaotic laser generated by the fiber coupler 60% of the port output; the chaotic laser is amplified by the erbium-doped fiber amplifier to a power of 1W and above, and is input into the high nonlinear fiber through the second polarization controller, and the final result is output after the photoelectric conversion by the high-speed photodetector; due to the original chaos After the laser signal is amplified and enters the highly nonlinear optical fiber, the combined effect of nonlinear effect and dispersion occurs, and its spectrum is significantly broadened, and its spectral bandwidth is enhanced. The final output presents the spectral characteristics of millimeter wave noise, realizing millimeter wave noise generation. 2.根据权利要求1所述的光生毫米波噪声发生器，其特征在于，混沌激光器通过光反馈实现混沌激光产生，是混沌激光产生的最简单的结构。2. The optically-generated millimeter-wave noise generator according to claim 1, wherein the chaotic laser realizes chaotic laser generation through optical feedback, and is the simplest structure for chaotic laser generation. 3.根据权利要求1所述的光生毫米波噪声发生器，其特征在于，掺铒光纤放大器用于实现原始混沌激光的放大以及最终产生毫米波噪声的功率调节。3. The optically-generated millimeter-wave noise generator according to claim 1, wherein the erbium-doped fiber amplifier is used to realize the amplification of the original chaotic laser and the power regulation of the final generation of the millimeter-wave noise. 4.根据权利要求1所述的光生毫米波噪声发生器，其特征在于，高非线性光纤的非线性系数大于10W-1km-1，混沌激光经过高非线性光纤后，发生非线性效应以及色散作用，实现混沌光谱展宽，混沌信号的频谱带宽的得到增强，最终输出频谱平坦的毫米波噪声。4. The light-generated millimeter-wave noise generator according to claim 1, wherein the nonlinear coefficient of the highly nonlinear optical fiber is greater than 10W -1 km -1 , and after the chaotic laser passes through the highly nonlinear optical fiber, nonlinear effects and The dispersion effect realizes the widening of the chaotic spectrum, the spectral bandwidth of the chaotic signal is enhanced, and finally output the millimeter wave noise with a flat spectrum.
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