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Optical fiber type terahertz wave generation device and method based on modulation instability

A modulation instability and generation method technology, applied in the field of optically generated terahertz waves, can solve problems such as unfavorable practicality, low frequency multiplication, and high cost of terahertz systems, and achieve the effects of simple and compact structure, cost saving, and lower bandwidth requirements

Inactive Publication Date: 2012-07-04
HUNAN UNIV
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Problems solved by technology

However, the nonlinear response efficiency of a single commercial intensity modulator is limited, and it is generally more suitable for generating first-order optical sidebands to achieve optical frequency doubling. Due to the low conversion efficiency and low frequency multiplication of high-order optical sidebands, the device bandwidth can only be reduced by half. requirements, the cost of this method of terahertz system is relatively expensive, which is not conducive to practical

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  • Optical fiber type terahertz wave generation device and method based on modulation instability
  • Optical fiber type terahertz wave generation device and method based on modulation instability
  • Optical fiber type terahertz wave generation device and method based on modulation instability

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Embodiment Construction

[0018] Such as figure 1 As shown, the device of an embodiment of the present invention includes a distributed feedback laser 1, a phase modulator 2, an intensity modulator 3, a microwave source 4, an erbium-doped fiber amplifier 5, a single-mode fiber 6, a tunable filter 7, and a photodetector 8 and an antenna 9, the feedback laser 1 outputs a continuous optical signal and inputs it to the phase modulator 2, and after the phase modulator widens its continuous light width, it is used together with the microwave drive signal output by the microwave source 4 as the intensity The input signal of modulator 3, described intensity modulator 3 outputs the optical double sideband signal that contains center carrier and two first-order sidebands, after being amplified by erbium-doped fiber amplifier 5, input to single-mode fiber (SMF), above-mentioned After single-mode optical fiber transmission, new second-order, third-order, fourth-order, and fifth-order optical signals are generated,...

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Abstract

The invention discloses an optical fiber type terahertz wave generation device and method based on modulation instability. The terahertz wave generation device based on modulation instability in optical fiber comprises a monomode laser, a phase modulation, a microwave source, an intensity modulator, an optical amplifier, a tunable filter, a photoelectric detector and an antenna. The optical fiber type terahertz wave generation device disclosed by the invention has simple and compact structure, can realize generation of tunable terahertz waves by adjusting the frequency of a microwave drive signal and has the advantages of greatly reducing the bandwidth requirements of the device and saving the cost of a system.

Description

technical field [0001] The invention relates to optically generated terahertz wave technology in the field of microwave photonics, in particular to a fiber-type terahertz wave generation device and method based on modulation instability. Background technique [0002] At present, the terahertz frequency band, which is in the microwave frequency band and the light wave frequency band, has attracted the attention of many scientific research institutions and companies. The terahertz wave in the 0.1-0.3THz frequency band has great development potential in high-speed wireless communication, military radar, imaging and other application fields due to its relatively small transmission loss in the atmosphere and relatively high power generation. It is a very popular emerging field. Research areas. Since this frequency band is closer to the microwave frequency band, electronic technology is often used to generate terahertz waves, such as electronic lasers, electronic solid-state sour...

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Application Information

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IPC IPC(8): H01S1/02
Inventor 郑之伟文双春李瑛陆顺斌范滇元
Owner HUNAN UNIV
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