Device for generating a beam of photons with wavelengths defining a substantially continuous supercontinuum

A technology of photon beams and photons, applied in the field of analysis systems, can solve problems such as reducing the brightness of light sources and spatial coherence, and achieve the effect of promoting repositioning

Active Publication Date: 2019-03-15
CENT NAT DE LA RECH SCI (C N R S) +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to partial modal filtering caused by Raman conversion, the output radiation is acquired in many modes, which reduces the brightness and spatial coherence of the source

Method used

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  • Device for generating a beam of photons with wavelengths defining a substantially continuous supercontinuum
  • Device for generating a beam of photons with wavelengths defining a substantially continuous supercontinuum
  • Device for generating a beam of photons with wavelengths defining a substantially continuous supercontinuum

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Embodiment Construction

[0045] The object of the invention is in particular to provide a device DG intended to generate a quasi-single-mode output beam FS of high brightness, wherein the photons have wavelengths defining a substantially continuous (super)continuum.

[0046] In the following, the generating device DG will be considered, by way of non-limiting example, intended to form part of a system for analyzing a sample, optionally of a medical type. However, the invention is not limited to this type of system. In particular, the invention relates to any system required comprising at least one device capable of generating polychromatic photon beams.

[0047] Furthermore, in the following, by way of non-limiting example, an analysis system is considered capable of performing Multiple Coherent Anti-Stokes Raman Scattering (CARS) analysis of a sample. Such a sample may eg be a blood sample. However, the invention is not limited to this type of analysis. Thus, the invention also relates to the anal...

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Abstract

The invention relates to a generation device (DG) which comprises: at least one pulsed laser source (SL) outputting primary photons having at least one wavelength in a single spatial mode and in pulses having high pump energy; shaping means (MM) acting on the primary photons in order to output an input beam (FE); and at least one optical fibre (FO) having at least ten modes between which the pumpenergy is initially distributed and suitable for relocating the latter by non-linear effect in a fundamental mode, before generating secondary photons with different wavelengths by converting wavelengths from the wavelength of the primary photons in the fundamental spatial mode.

Description

technical field [0001] The invention relates to a device responsible for generating polychromatic photon beams and an analysis system using such a device. Background technique [0002] As is known to those skilled in the art, in certain fields laser sources delivering a beam of photons with a substantially continuous distribution of wavelengths over a large spectral width (typically tens to hundreds of nanometers) are used. This is especially the case in the field of analysis of samples, possibly medical samples. [0003] These polychromatic sources (which are often referred to as continuums) are often produced by light-matter interactions involving nonlinear effects. A polychromatic source typically consists of at least one pulsed laser source delivering "primary" photons with a "primary" wavelength and an optical fiber microstructured to produce from the primary photons a secondary photon containing several "secondary" wavelengths (together forming a supercontinuum spect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/365
CPCG02F1/365G02F1/3528H01S3/067H01S3/302
Inventor K·克鲁帕B·沙拉比A·托内洛V·库代尔
Owner CENT NAT DE LA RECH SCI (C N R S)
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