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Hollow core energy transfer mid-infrared fiber and preparation method thereof

An infrared light, hollow core technology, applied in the direction of multi-layer core/cladding fiber, cladding fiber, glass manufacturing equipment, etc. Achieve tunability, reduce losses, and improve tolerance effects

Pending Publication Date: 2019-10-15
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a mid-infrared hollow-core energy-transmitting optical fiber and a preparation method thereof, which are used to solve the technical problem that existing optical fibers used in quantum cascade lasers cannot meet the full-band low-loss transmission requirements of quantum cascade lasers in actual processes

Method used

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  • Hollow core energy transfer mid-infrared fiber and preparation method thereof
  • Hollow core energy transfer mid-infrared fiber and preparation method thereof
  • Hollow core energy transfer mid-infrared fiber and preparation method thereof

Examples

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Embodiment 1

[0042] A hollow-core energy transmission mid-infrared optical fiber 100, which is applied to the laser transmission of quantum cascade lasers, such as figure 1 As shown, it is in the shape of a hollow tube, including: an optical fiber cladding 110 and an air core 120 inside, and an optical fiber polymer protective layer 130 arranged on the outer surface of the optical fiber cladding; wherein, the optical fiber cladding includes alternately spaced The chalcogenide glass layer and the polymer layer, the material of the chalcogenide glass layer includes tellurium element.

[0043] It should be noted, figure 1 , the outermost dotted coil and its adjacent solid coil represent the fiber polymer protective layer 130, the area defined between the two solid coils is the fiber cladding 110, and the innermost solid coil delineates the The area is the air core 120 .

[0044] The materials of chalcogenide glass layer and polymer layer can be selected in a wide range. Any polymer material w...

Embodiment 2

[0061] A method 200 for preparing a mid-infrared optical fiber for energy transmission with a hollow core according to Embodiment 1, comprising:

[0062] Step 210, evaporating a chalcogenide glass layer on the surface of the first polymer film to form a cladding film, wherein the chalcogenide glass includes tellurium element;

[0063] Step 220, using a round rod, winding the clad film, and winding a second polymer film on the outer surface of the clad film to obtain a clad rod;

[0064] Step 230, heat-setting the clad rod, and removing the round rod to obtain a prefabricated rod;

[0065] Step 240 , based on the drawing ratio, drawing and drawing the preform rod to obtain a hollow-core energy-transmitting mid-infrared optical fiber.

[0066] By adopting the method, the above-mentioned periodic structure can be realized simply and conveniently, wherein the chalcogenide glass layer is coated on the surface of the polymer film by vapor deposition, which ensures the uniformity of...

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Abstract

The invention discloses a hollow core energy transfer mid-infrared fiber and a preparation method thereof. The fiber is applied to a quantum cascade laser, has a hollow tubular shape and comprises a fiber cladding, an air core therein and a fiber polymer protective layer disposed on the outer surface of the fiber cladding, wherein the fiber cladding comprises alternating spaced polymer layers andchalcogenide glass layers containing tellurium elements. In the hollow core energy transfer fiber cladding provided by the invention, the chalcogenide glass layers and the polymer layers are periodically spaced to form a photonic band gap structure. Since the cladding contains tellurium elements and the two materials have a high refractive index difference, a wide transmission range (covering 3-20[mu]m) and low loss therein are ensured. In addition, the core contains an air medium to increase the damage threshold of the fiber. Therefore, the fiber provided by the invention can be applied to the quantum cascade laser and rationally designs the above periodic structure to realize the adjustability of the transmission band. In addition, the polymer makes the fiber light, flexible and portable, thereby enabling the portable transmission of laser from the quantum cascade laser.

Description

technical field [0001] The invention relates to the technical field of fiber optics, in particular to a mid-infrared hollow-core energy-transfer optical fiber and a preparation method thereof. Background technique [0002] Quantum cascade laser (QCL) is a new type of mid-to-far infrared semiconductor laser, which can provide an ultra-wide spectral range (3-20μm), has excellent wavelength tunability, and can achieve high output power, and can Working at room temperature, it has a good application prospect and a large application range. Therefore, in order to effectively utilize the advantages of quantum cascade lasers, the optical fiber used to transmit the laser light emitted by quantum cascade lasers is very important. [0003] At present, due to the inherent defects of the core material of the widely used solid core fiber, such as nonlinearity, dispersion, and light-induced damage, etc., the solid core fiber is limited in communication data transmission, high-power short-...

Claims

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Application Information

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IPC IPC(8): G02B6/02G02B6/032G02B6/036C03B37/027
CPCG02B6/02033G02B6/032G02B6/036C03B37/027
Inventor 陶光明任志禾徐文鑫
Owner HUAZHONG UNIV OF SCI & TECH
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