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A zblan fluoride photonic crystal fiber with super large positive dispersion

A photonic crystal fiber, positive dispersion technology, applied in the direction of cladding fiber, optical waveguide light guide, etc., can solve the problems of fluoride fiber dispersion can not be compensated, narrow mode-locking pulse, etc. good effect of transplantation

Active Publication Date: 2019-09-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing fluoride optical fiber cannot produce a mode-locked pulse with a very narrow pulse width and has a large limited loss due to the inability to compensate the dispersion. The present invention provides a ZBLAN fluoride with super large positive dispersion Photonic crystal fiber

Method used

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  • A zblan fluoride photonic crystal fiber with super large positive dispersion
  • A zblan fluoride photonic crystal fiber with super large positive dispersion
  • A zblan fluoride photonic crystal fiber with super large positive dispersion

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Embodiment Construction

[0019] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] The ZBLAN fluoride photonic crystal fiber of super large positive dispersion in the present embodiment, the material of fiber is 53ZrF 4 -20BaF 2 -4LaF 3 -3AlF 3 -20NaF.

[0021] Such as figure 1 As shown, the optical fiber comprises a core 1, an inner cladding 2 coated outside the core 1, and an outer cladding 3 coated outside the inner cladding 2. In the same section of the optical fiber, the inner cladding 2 is made of two layers of small air A regu...

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Abstract

The invention discloses a ZBLAN fluoride photonic crystal fiber with super large positive dispersion, and relates to the field of dispersion compensation devices in optical fiber communication systems. An outer cladding layer, the inner cladding layer is a regular hexagonal structure composed of two layers of small air channels, and the outer cladding layer is a regular hexagonal structure composed of four layers of large air channels. The cross-sectional area of ​​the large air channel is no more than 2 times the cross-sectional area of ​​the small air channel. The present invention achieves positive dispersion in the wavelength range of 1.8um-3.6um by designing the internal structure of the fluoride optical fiber, especially the maximum positive dispersion value of -351.3ps / km / nm at 2.9um, and maintains 0.05dB / m The low confinement loss compensates the dispersion generated in the laser cavity to near zero dispersion to achieve the purpose of obtaining ultrashort and high-energy pulses.

Description

technical field [0001] The invention relates to the field of dispersion compensation devices in optical fiber communication systems, in particular to a ZBLAN fluoride photonic crystal fiber with super large positive dispersion. Background technique [0002] Ultrashort pulse wavelengths with high peak power at mid-infrared wavelengths (2.5um-25um) have important application prospects in the fields of national defense, laser surgery, industrial processing, and as pump sources for generating mid-infrared and far-infrared spectra. At the same time, the ultrashort pulse with high peak power in the mid-infrared wavelength is also an ideal light source for shaping and processing plastics, polymers, glass and other materials. In 2015, Duval et al. have achieved ultrashort high-peak pulses with a pulse spacing of 207 fs and a peak power of 3.5 kW in the mid-infrared band. However, without an additional dispersion compensator introduced into the cavity where the ultrashort pulse is g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02
Inventor 李剑峰赖雪王妍妍海永晨刘永
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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