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Optical fiber for producing ultra-broadband mid-infrared supercontinuum and method for making same

An infrared ultra-continuum technology, which is applied in the field of mid-infrared nonlinear optical materials, can solve the problems of high pump power, low nonlinearity of fluoride optical fiber, and high infrared loss, and achieve wide transmission spectral range, low cost, and pumping The effect of low power

Active Publication Date: 2017-09-05
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high infrared loss of fluoride fiber in the long wavelength, the SC in the fiber cannot be broadened to longer wavelengths
In addition, the low nonlinearity of fluoride fiber itself means that SC generation requires high pump power, which is the main disadvantage that limits the material to produce high-brightness supercontinuum

Method used

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  • Optical fiber for producing ultra-broadband mid-infrared supercontinuum and method for making same
  • Optical fiber for producing ultra-broadband mid-infrared supercontinuum and method for making same
  • Optical fiber for producing ultra-broadband mid-infrared supercontinuum and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Ge 0.12 As 0.24 Se 0.64 / Ge 0.1 As 0.25 S 0.65 Optical fiber preparation

[0027] Ge with a diameter of 10 mm was prepared by the vacuum melting-quenching method commonly used in the preparation of chalcogenide glasses 0.12 As 0.24 Se 0.64 Core glass rod and 15mm diameter Ge 0.1 As 0.25 S 0.65 Cladding glass rod; pull the fiber core glass rod at 350°C to make a thin core glass rod with a diameter of 2.3mm; drill two cladding glass rods along the central axis to obtain a cladding glass casing with an inner diameter of 2.3mm , and polish the inner wall of the cladding glass casing; insert the core glass thin rod into one of the cladding glass casings, and draw it into a secondary thin rod with a diameter of 2.3mm at 350°C; insert the secondary thin rod into the other In the cladding glass sleeve, the optical fiber with a diameter of 160 μm is drawn at 350 ° C, and the corresponding core diameter is about 4 μm, such as figure 1 shown.

[0028] The t...

Embodiment 2

[0029] Example 2: Ge 0.1 As 0.3 Se 0.6 / Ge 0.13 As 0.2 S 0.67 Optical fiber preparation

[0030] Ge with a diameter of 10 mm was prepared by the vacuum melting-quenching method commonly used in the preparation of chalcogenide glasses. 0.1 As 0.3 Se 0.6 Core glass rod and 15mm diameter Ge0.13 As 0.2 S 0.67 Cladding glass rod; draw the core glass rod at 370°C to make a thin core glass rod with a diameter of 2.3mm; drill two cladding glass rods along the central axis to obtain a cladding glass casing with an inner diameter of 2.3mm , and polish the inner wall of the cladding glass casing; insert the core glass thin rod into one of the cladding glass casings, and draw it into a secondary thin rod with a diameter of 2.3mm at 370°C; insert the secondary thin rod into the other In the cladding glass sleeve, an optical fiber with a diameter of 240 μm is drawn at 370 ° C, corresponding to a core diameter of about 6 μm.

[0031] The test and calculation results show that the ...

Embodiment 3

[0032] Example 3: Ge 0.15 As 0.2 Se 0.65 / Ge 0.15 As 0.15 S 0.7 Optical fiber preparation

[0033] Ge with a diameter of 10 mm was prepared by the vacuum melting-quenching method commonly used in the preparation of chalcogenide glasses. 0.15 As 0.2 Se 0.65 Core glass rod and 15mm diameter Ge 0.15 As 0.15 S 0.7 Cladding glass rod; draw the core glass rod at 340°C to make a thin core glass rod with a diameter of 2.3mm; drill two cladding glass rods along the central axis respectively to obtain a cladding glass casing with an inner diameter of 2.3mm , and polish the inner wall of the cladding glass casing; insert the core glass thin rod into one of the cladding glass casings, and draw it into a secondary thin rod with a diameter of 2.3mm at 340°C; insert the secondary thin rod into the other In the cladding glass sleeve, a fiber with a diameter of 400 μm is drawn at 340 ° C, corresponding to a core diameter of about 10 μm.

[0034] The test and calculation results sho...

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Abstract

The invention discloses an optical fiber for generating an ultra-wideband mid-infrared supercontinuum and a manufacturing method thereof. The optical fiber is composed of a fiber core and a cladding layer. The optical fiber has a diameter of 160 to 400mum, and the fiber core has a diameter of 4 to 10mum. The fiber core is made of selenide glass and has a chemical component formula of GexAsySe (1-x-y), x=0.1 to 0.15, and y=0.2 to 0.3. The cladding layer is made of sulphide glass and has a chemical component formula of GemAsnS (1-m-n), m=0.1 to 0.15, and n=0.15 to 0.25. According to the optical fiber, the numerical aperture is no less than 1.3, the zero dispersion wavelength is between 3.2 to 4.0mum, the nonlinear coefficient is larger than 50 / W / km, and transmission spectrum range coverage is 2 to 10mum, and the optical fiber can serve as a high-performance nonlinear medium for generating an ultra-wideband mid-infrared supercontinuum.

Description

technical field [0001] The invention relates to a mid-infrared nonlinear optical material, in particular to an optical fiber for producing an ultra-broadband mid-infrared supercontinuum and a preparation method thereof. Background technique [0002] The mid-infrared (MIR) supercontinuum (SC) light source has the advantages of wide spectrum, good spatial coherence, and high brightness. important application. Traditional broadband MIR light sources mainly include glowbar and synchrotron source. The latter can produce 10 in the 1-10μm band 16-17 photons / s / mm 2 The brightness of / sr / 0.1%bandwith is 2-3 orders of magnitude higher than the former. At present, MIR spectroscopy detection with high signal-to-noise ratio and high spatial resolution can only use synchrotron radiation light sources with high brightness, which severely limits the application of MIR spectroscopy technology in ordinary environments. Recently, the development of novel quantum cascade lasers (QCLs) has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02H01S3/067C03B37/012C03B37/025
CPCC03C13/041C03C13/043G02B6/02395
Inventor 杨志勇张斌翟诚诚祁思胜郭威杨安平任和王雨伟唐定远
Owner XUZHOU NORMAL UNIVERSITY