Side leaking photon crystal optical fiber and producing method thereof

Abstract

The invention is a side leakage photon crystal optical fiber, and its structure has one or two light wave high-equivalent refractivity linear regions extending outward from core region to pass through coating region and being parallel with the fiber core and having cross section height between half wavelength and wavelength of transmitted light, and its preparing method comprises the three steps of material selecting and processing, precast bar making, charging and wire drawing on wire drawing tower; the transmission losses of two vertical polarizing state of its guide mode have obviously difference, and it can use as single polarizing optical fiber itself and because of having stronger rotation sensitivity, it is suitable to small-rotating angle optical fiber sensing, and can be used for making standardized and automated production of high quality optical fiber couplers.

Description

technical field

[0001] The invention relates to a side-leakage photonic crystal fiber and a preparation method thereof, in particular to the field of special optical fibers for optical fiber sensing. Background technique

[0002] Since the photonic crystal fiber was born in 1996, new structures such as large numerical aperture, large mode field area, extremely small fundamental mode field area and high birefringence have been developed to meet various special needs. A typical photonic crystal fiber is a silica fiber or a polymer fiber. Air holes are periodically arranged in the cladding along the axial direction, and the fiber core is composed of an axial line defect that destroys the periodicity of its refractive index modulation. The existence of the air hole greatly expands the refractive index difference between the core and the cladding, provides a larger free space for the new structure design of the optical fiber, and provides a new possibility for controlling the tra...

Images