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Single crystal tunable broad band noncolinear femtosecond light parameter magnification method and apparatus

An optical parametric amplification, non-collinear technology, applied in nonlinear optics, optics, instruments, etc., can solve the problems of high cost and complex structure, and achieve the effect of low cost, small size and simple assembly

Inactive Publication Date: 2008-07-02
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to provide a single crystal tunable broadband non-collinear femtosecond optical parametric amplification method and device, which solves the technical problems of complex structure and high cost in the background technology

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  • Single crystal tunable broad band noncolinear femtosecond light parameter magnification method and apparatus

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Embodiment Construction

[0027] The present invention uses the nonlinear crystal BBO as the amplification medium, the second harmonic wave and optical parameter amplification occur in the same nonlinear crystal, provides μJ pulse energy, broadband tuning output, the spectral bandwidth can reach more than 26nm, and the signal light tuning output range is 475nm ~595nm. The energy gain of BBO crystals is generally 1-5mm, preferably 2-3mm, and preferably 2mm.

[0028] The pumping source in the embodiment of the present invention adopts a kilohertz high-power titanium sapphire laser system, and the ultrashort pulse output by the system: the repetition frequency is 1KHz, the pulse width is 40fs, the center wavelength is 800nm, the single pulse energy is 300μJ, and the bandwidth is 37nm. The second-order nonlinear medium adopts 5mmβ-BBO crystal, and the cutting angle θ=29.2°.

[0029] see figure 1 , the single crystal tunable broadband non-collinear femtosecond optical parametric amplification device of th...

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Abstract

The invention relates to a method and a device for amplifying a single crystal tunable broadband non-collinear femtosecond optical parameter. Light output from a pump source is divided into two beams by passing a glass piece GP: one beam of reflection light is focused after passing through a lens L1 onto a crystal S which generates a super-continuous spectrum, then is collimated by a collimating lens L2 and is incident to a non-linear crystal BBO by an all reflection mirror M2, so as to form a signal light which has an amplified optical parameter and is horizontally polarized; the other beam of transmission light passes through a lens L3, and is delayed to synchronize with the signal light by a delay device CC, and is incident to the non-linear crystal BBO, and then is converted to a pump light which is vertically polarized. The pump light and the signal light generate a type I phase matching non-collinear optical parametric amplification by the non-linear crystal BBO; at the same time, the signal light which satisfies the frequency multiplication phase matching angle and the non-collinear optical parametric amplification phase matching angle is amplified. The invention solves the technical problems such as complicated structure of the background art and the higher cost. The invention has simple assembly, small size and good stability.

Description

technical field [0001] The invention relates to a tunable broadband non-collinear femtosecond optical parameter amplification method and device based on a single crystal. Background technique [0002] Ultrashort laser pulse technology has extensive and special applications in the fields of physics, chemistry, biology, medical research and ultrafast technology. The ultrashort laser pulse technology is developing rapidly, and the ultrashort laser pulse width is getting wider and higher, and the intensity is getting higher and higher. The study of ultrafast processes often requires tunable ultrashort laser pulses, tunable femtosecond laser pulses from infrared to visible light bands, which can be used to study nonlinear optics, ultrafast time-resolved spectroscopy, and ultrafast processes in solids and liquids . Optical parametric amplification is one of the most convenient and reliable methods to obtain tunable femtosecond laser pulses from infrared to visible light bands. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/39G02F1/35
Inventor 刘红军侯米娜赵卫王屹山
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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