Broad band TH2 light generator

A terahertz generator technology, applied in the field of ultrafast optics, can solve the problems of low nonlinear conversion efficiency of terahertz light, low output pulse repetition rate, increase system operating cost, etc., to improve conversion efficiency, simple and compact structure , the effect of low cost

Inactive Publication Date: 2007-06-27
EAST CHINA NORMAL UNIV
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Problems solved by technology

However, low pulse power leads to low nonlinear conversion efficiency of terahertz light, which reduces the signal-to-noise ratio of the system in another way
The femtosecond laser regeneration amplification system can greatly increase the output laser pulse power, but its output pulse repetition rate (generally 1kHz level) is relatively low, and at the same time increases the operating cost of the entire system

Method used

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  • Broad band TH2 light generator
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Embodiment Construction

[0013] The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:

[0014] As shown in Figures 1, 2, 3a, and 3b, the symbols in the figures are introduced as follows:

[0015] As shown in Figure 1, L1~5 are lenses, P1 and P2 are polarizers, M1~9 are 45° flat mirrors, BS1~3 are beam splitters, PM1~4 are 90° off-axis parabolic mirrors, and Ti:S is Titanium-doped sapphire, TC is a terahertz crystal, OE is a terahertz detection crystal, D1 and D2 are receivers, S is a sample, and NA is a neutral attenuator.

[0016] As shown in Figure 2, L is a lens, P1 and P2 are Brewster prisms, CR1, CR2, CR3 and CR4 are concave mirrors, PM is a 90° off-axis parabolic mirror, Ti:S is titanium-doped sapphire, and TC is solar Hertz crystal, HR is a 0° plane high reflection mirror.

[0017] As shown in Figure 3a and 3...

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Abstract

This invention relates to a super-quick optical technology including utilizing optical non-linear conversion technology in a laser cavity to generate THz laser, and said generator utilizes a non-linear optical rectification theory to put a THz laser generator at the beam waist in the cavity to increase its laser conversion efficiency. Since a laser oscillator is used as a pump source, the THz laser generated by non-linear optical rectification has the character of wide spectrum and high repeatability.

Description

technical field [0001] The invention relates to ultrafast optical technology, and the core of the technology is to generate terahertz laser light by optical nonlinear conversion technology in a laser cavity. Background technique [0002] The far-infrared or terahertz spectral region has attracted more and more attention in recent decades due to its unique optical properties. So far, research on the application of terahertz optics has covered the fields of physics, chemistry, materials, biomedicine, national defense, and environmental detection, which indicates the huge development potential and application value of terahertz optics, and has great impact on scientific research, national economy and social development. impetus cannot be underestimated. Among many terahertz optical technologies, broadband terahertz time-domain spectroscopy (THz-TDS) (as shown in Figure 1) is one of the more important and commonly used technologies. Based on nonlinear optical rectification and...

Claims

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Application Information

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IPC IPC(8): H01S3/108H01S3/00
Inventor 徐世祥彭滟蔡华董华芳曾和平
Owner EAST CHINA NORMAL UNIV
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