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Super-continuum spectrum light source and coherent anti Stokes Raman scattering imaging system

A supercontinuum light source and supercontinuum technology are applied in the field of supercontinuum light sources and coherent anti-Stokes Raman scattering imaging systems, which can solve the problems of poor time-spectrum consistency of supercontinuum light sources and achieve good flatness. and continuity, small relative time delay, high spectral power density effect

Inactive Publication Date: 2013-07-24
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the embodiments of the present invention is to provide a supercontinuum light source, which aims to solve the problem of poor time-spectrum consistency of existing supercontinuum light sources

Method used

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  • Super-continuum spectrum light source and coherent anti Stokes Raman scattering imaging system
  • Super-continuum spectrum light source and coherent anti Stokes Raman scattering imaging system
  • Super-continuum spectrum light source and coherent anti Stokes Raman scattering imaging system

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Embodiment 1

[0027] Such as figure 1 As shown, the supercontinuum light source provided by the embodiment of the present invention includes a laser 1 for generating laser pulses, and the fully positive dispersion photonic crystal fiber 2 is pumped by the laser pulses to generate supercontinuum. Wherein, the laser is generally a femtosecond laser, and the laser pulse is a femtosecond pulse. The supercontinuum produced in this way maintains a single pulse in the time domain, has better flatness and continuity in the frequency domain, and has a higher spectral power density. At the same time, the relative time delay between spectral components of different frequencies is small, the time-spectrum consistency is good, and the spectral range is wide.

[0028] Usually, the supercontinuum light source also includes a continuously variable attenuator, a beam expander 3 and a coupling objective lens arranged in sequence along the laser pulse propagation direction; wherein, the continuously variable...

Embodiment 2

[0036] Figure 5 The architecture of the coherent anti-Stokes Raman scattering imaging system provided by the embodiment of the present invention is shown, and the details are as follows. The system includes a femtosecond laser 1 , a spectroscopic device 21 , a conversion device 22 , a delay device 23 , a collinear focusing device 25 and an imaging device 24 . Wherein, the femtosecond laser 1 is used to generate ultrashort laser pulses. The spectroscopic device 21 is used to make the ultrashort laser pulse generate a first ultrashort laser pulse and a second ultrashort laser pulse. The conversion device 22 is used to convert the first ultrashort laser pulse into a supercontinuum, wherein the supercontinuum is simultaneously used as pump light and Stokes light acting on the sample to generate coherent phonons . The delay device 23 is used to adjust the time when the second ultrashort laser pulse reaches the sample, wherein the delayed second ultrashort laser pulse is used as...

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Abstract

The invention belongs to the technical field of photoelectricity, and provides a super-continuum spectrum light source and a coherent anti Stokes Raman scattering imaging system. The super-continuum spectrum light source comprises a laser which is used for generating laser pulses, and a super-continuum spectrum is generated through laser pulse pumping full-orthochromatic scattered photon crystal optical fibers. Due to the fact that the super-continuum spectrum is generated through the laser pulse pumping full-orthochromatic scattered photon crystal optical fibers, a single pulse is kept in a time domain, good flatness and continuity exist in a frequency domain, and high light spectrum power density is provided. Meanwhile, relative time delay between light spectrum components of different frequency is short, the spectrum consistency is good, and the light spectrum range is wide. Therefore, the super-continuum spectrum produced by the super-continuum spectrum light source is wide in application range.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, in particular to a supercontinuum light source and a coherent anti-Stokes Raman scattering imaging system. Background technique [0002] When a high-power ultrashort pulse passes through an optical medium with nonlinear effects, many new frequency components will be generated in the spectrum of the transmitted pulse under the action of various nonlinear effects in the medium, making the output pulse spectral width much larger than that of laser Pulse, that is, to obtain the supercontinuum. [0003] The propagation equation of optical pulses in a nonlinear fiber can be described by the nonlinear Schrödinger equation: [0004] ∂ A ∂ z + 1 2 ( α ( ω 0 ...

Claims

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Application Information

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IPC IPC(8): H01S3/067G02F1/365
Inventor 牛憨笨刘双龙刘伟陈丹妮尹君
Owner SHENZHEN UNIV
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