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A method to efficiently control the wavelength of bimodal radiation in a random medium for specific dyes

A random medium and a specific technology, which is applied to laser components, electrical components, lasers, etc., can solve the problem of difficult distinction of burrs and small peaks

Inactive Publication Date: 2016-08-17
CHINA UNIV OF MINING & TECH
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Problems solved by technology

Since the two main peaks are located near a specific center frequency, it is easier to distinguish them, but it is not easy to distinguish between the main radiation peak and its surrounding burr peaks

Method used

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  • A method to efficiently control the wavelength of bimodal radiation in a random medium for specific dyes
  • A method to efficiently control the wavelength of bimodal radiation in a random medium for specific dyes
  • A method to efficiently control the wavelength of bimodal radiation in a random medium for specific dyes

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Embodiment Construction

[0017] Attached below Figure 1-7 A detailed description of the specific implementation of the system: a method of effectively controlling the wavelength of doublet radiation in a random medium of a specific dye in the present invention, the structural diagram is as follows figure 1 As shown, it includes a femtosecond laser 1 , a spatial light wave modulator 2 , and a gain-scattering random medium 3 . The gain scattering random medium (3) is alternately arranged by gain medium layers and random medium layers; the dielectric constant of the scattering medium layer is , and the thickness is a constant s; the dielectric constant of the gain medium layer is ε 1 , the thickness is a random variable a, a=a 0 (1+Wr),a 0 =120nm, W is a random intensity, and γ is a random variable located in [-0.5, 0.5].

[0018] Such as figure 2 As shown, the left side corresponds to the four-level system diagram of the dye monomer laser radiation, and the right side corresponds to the four-leve...

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Abstract

The invention discloses a method for effectively controlling the double peak radiation wavelength in a specific dye random medium. The method includes the following steps: firstly, a femtosecond laser pump source with a specific center frequency performs single-frequency pumping on all long-lived light wave modes existing in the medium, sequentially obtains the specific spatial amplitude distribution corresponding to each light wave mode, and then extracts each spatial coordinate The outer envelope of the amplitude distribution corresponding to the point is normalized to obtain the light wave spatial modulation function Fe(x), and the light wave modulation function value is used to directly match the light intensity transmittance of the corresponding coordinate point in the light wave modulator, so as to realize the pump Spatially precise modulation of Pu light and effective control of the output wavelength.

Description

technical field [0001] The invention relates to a method for effectively controlling the wavelength of double-peak radiation in a random medium of specific dyes. This system belongs to the field of stochastic lasers. It uses rhodamine 6G methanol solution dye and TiO2 nano-scattering particles as the random medium, femtosecond laser as the pump light source of the gain-scattering random medium, and uses the light wave modulation function Fe(x) to The spatial transmittance g(x) of the spatial lightwave modulator is matched to realize spatially precise modulation of the pump light intensity, thereby realizing effective control of the output wavelength. Background technique [0002] In recent decades, scholars at home and abroad have discovered high-intensity random laser radiation in different media, especially the phenomenon observed in ZnO semiconductor random media by H.Cao et al. from Northwestern University in the United States. They ideally described the luminescent pro...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/094H01S3/213H01S3/102
Inventor 刘海崔海娜程德强牛晓聪潘红帅荆胜羽冷乐蒙尹诗斌
Owner CHINA UNIV OF MINING & TECH
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