Ultra-large positive dispersion ZBLAN fluoride photonic crystal optical fiber

A technology of photonic crystal fiber and positive dispersion, which is applied in the direction of cladding fiber, optical waveguide and light guide, etc., can solve the problems of narrow mode-locked pulse and fluoride fiber dispersion that cannot be compensated, and achieves easy process, simple structure and process, and can good transplantability

Active Publication Date: 2017-10-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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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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  • Ultra-large positive dispersion ZBLAN fluoride photonic crystal optical fiber
  • Ultra-large positive dispersion ZBLAN fluoride photonic crystal optical fiber
  • Ultra-large positive dispersion ZBLAN fluoride photonic crystal optical fiber

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Embodiment Construction

[0019] The technical solutions in this embodiment will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

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

[0021] Such as figure 1 As shown, the optical fiber includes a core 1, an inner cladding layer 2 covering the core 1 and an outer cladding layer 3 covering the inner cladding layer 2. In the same section of the optical fiber, the inner cladding layer 2 is composed of two layers of small air The regular hexagonal s...

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Abstract

The invention discloses an ultra-large positive dispersion ZBLAN fluoride photonic crystal optical fiber, and relates to the field of dispersion compensating devices in an optical fiber communication system. The optical fiber comprises a core, an inner cladding covering the core, and an outer cladding covering the inner cladding. The inner cladding is in a regular hexagonal structure composed of two layers of small air hole channels. The outer cladding is in a regular hexagonal structure composed of four layers of large air hole channel. The cross-sectional area of each large air hole channel does not exceed 2 times the cross-sectional area of each small air hole channel. According to the invention, the positive dispersion of the optical fiber in the wavelength range of 1.8 microns to 3.6 microns by designing the internal structure of the fluorinated optical fiber, and especially the maximum positive dispersion value of -351.3ps / km / nm is acquired at 2.9 microns; the low-limit loss of 0.05dB / m is kept; and the dispersion generated in a laser cavity is compensated to near-zero dispersion to acquire ultra-short and high-energy pulse.

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 in the mid-infrared wavelength (2.5um-25um) have important application prospects in the fields of national defense, laser surgery, industrial processing, and as a pump source for generating mid-infrared and far-infrared spectra. At the same time, ultra-short pulses with high peak power of mid-infrared wavelength are also ideal light sources for plastics, polymers, glass and other materials. In 2015, Duval et al. have realized ultra-short high-peak pulses with a pulse interval 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 that generates the ultrashort pulse, it is difficult to furt...

Claims

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Application Information

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Patent Type & Authority Applications(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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