Photo-generated millimeter wave noise generator based on high-nonlinearity optical fiber

Abstract

The invention relates to a photo-generated millimeter wave noise generator based on a high-nonlinearity optical fiber. The photo-generated millimeter wave noise generator comprises a distributed feedback laser, an optical fiber isolator, a first polarization controller, an erbium-doped optical fiber amplifier, a second polarization controller, the high-nonlinearity optical fiber (HNLF) and a high-speed photoelectric detector which are connected in sequence. According to the scheme, millimeter wave noise is generated through an optical method, the bottleneck of electronic bandwidth is broken through, ultra-bandwidth millimeter wave noise is easy to generate, and the structure is simple; the power of output noise depends on the amplification power of the erbium-doped optical fiber amplifier,and compared with an existing electronic noise source, the output power is easy to adjust, and the maximum power capable of being output is larger. Millimeter wave noise is generated through the combined effect of the nonlinear effect, modulation instability, dispersion and the like in the high nonlinear optical fiber, the frequency spectrum of the generated noise is flatter, and the bandwidth islarger.

Description

technical field [0001] The invention relates to a noise generator, in particular to an optically-generated millimeter-wave noise generator based on a highly nonlinear optical fiber, and belongs to the fields of cryptography, communication, information security and the like. Background technique [0002] Random noise, especially millimeter wave noise, is common in communication, automatic control, industrial measurement, aerospace and other systems, which has caused serious harm to practical applications. In order to overcome the influence of millimeter wave noise, it is often necessary to use a noise generator to simulate the anti-noise of the instrument and equipment. Therefore, it is necessary to generate artificially controllable millimeter-wave noise, and develop a millimeter-wave noise generator. [0003] At present, there are mainly two ways to realize the noise generator: digital synthesis technology and physical device noise amplification technology. Digital synthe...

AI Technical Summary

Problems solved by technology

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 as the bandwidth increases, the flatness of the output noise power becomes worse.

[0004] However, the current operating frequency of the noise generator can no longer meet the operating frequency of some high-frequency devices

How to output a continuous random millimeter-wave noise signal with a uniform and continuous power spectrum and stable and controllable power in a very wide frequency range (hundreds of GHz), there are many difficulties in principles, technologies, processes, etc.

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