Tunable plasma photonic crystal fiber device

Abstract

The invention discloses a tunable plasma photonic crystal fiber device. The tunable plasma photonic crystal fiber device comprises a photonic crystal fiber, a high-voltage pulse power supply, a protective resistor, a high-voltage electrode, an insulating piece, a ground electrode, an incident Brewster window and an outgoing Brewster window; an infrared laser enters the photonic crystal fiber through the incident Brewster window and is emitted from the outgoing Brewster window, the high-voltage pulse power supply applies a pulse voltage to the high-voltage electrode, and low-temperature plasmais obtained in a hollow hole filled with inert working gas in a form of dielectric barrier porous discharge to realize the photonic crystal fiber filled with the plasma; and by changing pulse parameters of the high-voltage power supply, the gas pressure of the inert working gas or an electrode spacing, characteristic physical parameters and the gas temperature of the plasma can be adjusted, and infrared band gap characteristics of the photonic crystal fiber can be tuned in a wide range. The tunable plasma photonic crystal fiber device has the advantages of continuous tuning, reconfigurability,wide tuning frequency band and high response speed, and has broad industrial application prospects in the optical communication aspect.

Description

technical field [0001] The invention relates to the fields of plasma technology and photonic crystal technology, in particular to a plasma photonic crystal fiber. Background technique [0002] Photonic crystal fiber, also known as microstructure fiber, is divided into bandgap photonic crystal fiber and refractive index guided fiber, and has broad application prospects in communication, sensing, quantum mechanics, medicine and other fields. It has a more complex refractive index distribution on its cross section. In addition to the fiber core area (which can also be air holes), it usually contains hollow holes (air holes) in a periodic arrangement around the fiber core. The scale of these hollow holes is related to the light wave. The wavelengths are roughly of the same order and throughout the entire length of the device. Light waves can be confined to propagate in the core region of the fiber with low refractive index, and have the characteristics of low loss, infinite sin...

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Problems solved by technology

However, the realization of tunable plasmonic photonic crystal fiber will face the following four main problems: (1) According to Paschen's law of gas discharge, the diameter of the hollow hole in the photonic crystal fiber is very small (10 15 cm -3 ), the conventional gas discharge method is difficult to realize; (3) under the condition of small-sized and high-density low-temperature plasma, the heating problem of photonic crystal fiber is serious; (4) the filling of low-temperature plasma is not easy to be uniform, which makes the photonic band gap There are large differences in characteristics, which affect the tuning effect of infrared light transmission

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