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Method for designing a single-sideband modulation electric control segmented sweep frequency source

A technology of single-sideband modulation and design method, applied in electrical components, electromagnetic transmitters, electromagnetic wave transmission systems, etc., can solve the problems of limited frequency sweep rate and wavelength range, and achieve improved dynamic range, improved sweep rate, and economical cost effect

Inactive Publication Date: 2020-01-14
TIANJIN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of limited sweep rate and wavelength range of the traditional single sweep source, and provide a design method for electronically controlled segmental sweep source with single sideband modulation, using wavelength division multiplexing technology to combine multiple DFB The output of the laser source is integrated, and the discrete wavelength laser output signal is modulated into a continuous wavelength sweep signal that meets the requirements through single sideband modulation

Method used

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  • Method for designing a single-sideband modulation electric control segmented sweep frequency source
  • Method for designing a single-sideband modulation electric control segmented sweep frequency source

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Embodiment Construction

[0012] The present invention will be described in detail below with reference to the drawings and examples.

[0013] figure 1 It is a segmented frequency sweep light source. The output signals of the 3 DFB laser light sources are distributed at equal intervals according to the wavelength, and the output of the 3 DFB laser light sources are integrated and output at the same time by using wavelength division multiplexing technology. After that, these signals with equal wavelength intervals are spectrally broadened by single-sideband modulation for discrete output signals. During the broadening process, it is necessary to ensure that all frequencies are output to form a continuous-wavelength sweep signal output.

[0014] Theoretically, the cascade of n DFB laser light sources can increase the sweep rate by n times, and the frequency of the dynamic signal that can be detected by the composed sensing system will also increase by n times, but considering the cost issue, only use A cascad...

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Abstract

The invention relates to a method for designing a single-sideband modulation electric control segmented sweep frequency source. The method is characterized in that output signals of the n DFB laser light sources are distributed at equal intervals according to the wavelength; output of the n DFB laser light sources is integrated and output at the same time through the wavelength division multiplexing technology, then frequency spectrum broadening is conducted on discrete output signals of the signals with the equal wavelength intervals through single side band modulation, and it is guaranteed that all frequencies are output in the broadening process so that swept-frequency signals with continuous wavelengths can be formed and output.

Description

Technical field [0001] The invention belongs to the technical field of laser signal source equipment, and specifically relates to the design of a single-sideband modulation electronically controlled segmented frequency sweep source. Through segmented frequency sweep, wavelength division multiplexing technology and single-sideband modulation technology, it can achieve large bandwidth In the case of maintaining high-speed sweep. Background technique [0002] Laser technology is currently recognized as the fastest growing and most widely used technology in the communications field. The emergence of laser has driven the development of the entire optical field, and has also had a huge impact on other fields such as the medical industry and material science. The laser output light has good directivity, purity, high brightness and high energy density, and is widely used in the field of optical communication technology. At present, there are many kinds of lasers that have been develope...

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Application Information

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IPC IPC(8): H04B10/50H04B10/556H04B10/572
CPCH04B10/503H04B10/5563H04B10/572
Inventor 吕辰刚刘红晨霍紫强
Owner TIANJIN UNIV
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