Double-frequency CARS measuring device and method based on bound state light soliton

A measurement device and optical soliton technology, applied in measurement devices, coupling of optical waveguides, optics, etc., can solve the problems of system complexity and system cost increase, and achieve continuous and rapid wavelength adjustment, large wavelength tuning range, and simple structure. Effect

Active Publication Date: 2020-01-14
TIANJIN UNIV
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Problems solved by technology

Multi-channel CARS technology requires multiple incident pulse pairs with different wavelengths, which doubles the system complexity and system cost

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  • Double-frequency CARS measuring device and method based on bound state light soliton
  • Double-frequency CARS measuring device and method based on bound state light soliton
  • Double-frequency CARS measuring device and method based on bound state light soliton

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Embodiment Construction

[0038] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. .

[0039] Such as figure 1 Shown is a schematic diagram of a dual-frequency CARS measurement device based on bound state optical solitons of the present invention. The device mainly includes a femtosecond laser 1, an ultrashort pulse beam splitting adjustment part (composed of an electronically controlled liquid crystal wave plate 2 and a polarizing beam splitting prism 3), Stokes light pulse generation and transmission optical path (composed of a half-wave sheet 4, beam expander 5, fiber coupling mirror 6, highly nonlinear polarization-maintaining photonic crystal fiber 7, fiber collimator beam expander 8, first reflector 9, first dispersion glass 10), pump light transmission optical path (composed of a second reflector 11, an adjustable spatial light delay line 12, an adjustable attenuation sheet 13, and a second dispersio...

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Abstract

The invention discloses a double-frequency CARS measuring device and method based on a bound-state light soliton. The device at least comprises a femtosecond laser (1), an ultra-short pulse beam splitting adjusting part, a Stokes light pulse generating and transmitting light path, a pump light transmitting light path, a beam combiner (15) and a CARS microimaging system (16) which are connected insequence. Based on a soliton self-frequency-shift effect and a birefringence effect when an ultrashort pulse is transmitted in a high-nonlinearity photonic crystal fiber, a bound-state light soliton with overlapped time domains and separated wavelengths are generated. When the bound-state light soliton is used as a Stokes light pulse of a CARS system, the bound-state light soliton can simultaneously act with a pump light pulse to realize simultaneous excitation and detection of resonant frequencies of two molecules to be detected. In the invention, a system structure of the traditional CARS measurement system is simplified, system cost is reduced, and a chemical selective imaging capability and a multi-molecule simultaneous detection capability of the CARS system are improved.

Description

technical field [0001] The invention belongs to the fields of nonlinear optics, solitons and coherent Raman spectrum detection, and in particular relates to a dual-frequency CARS measuring device and method. Background technique [0002] Coherent anti-Stokes Raman scattering (CARS) technology has been widely used in the field of cell biology due to its unique chemoselective detection ability. In the CARS technology, the pump light pulse and the Stokes light pulse are incident on the sample to be measured at the same time, and the frequency difference between the two incident pulses is adjusted to make it the same as the resonance frequency of the molecule to be measured to achieve resonance excitation, resulting in anti-Stokes Raman scattering signal, by detecting the strength and distribution of the anti-Stokes signal, the chemoselective imaging of the sample to be tested can be realized. Since the multi-channel CARS technology can measure multiple Raman scattering lines a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65G01N21/01G02B6/26G02B6/27
CPCG01N21/65G01N21/01G02B6/266G02B6/27G01N2021/653G01N2021/0112
Inventor 江俊峰张永宁刘铁根王双刘琨张学智丁振扬
Owner TIANJIN UNIV
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