Wide-range multiband thermo-optical switch and manufacturing method thereof

Abstract

The invention discloses a wide-range multiband thermo-optical switch and a manufacturing method thereof, and the method comprises the steps: fully filling a photonic crystal fiber with liquid crystal through the atmospheric pressure and capillary action, then cutting the fully-filled photonic crystal fiber and a single-mode fiber through an optical fiber cutter, and flatly placing the fully-filled photonic crystal fiber and the single-mode fiber on an optical fiber fusion splicer; welding the single-mode fiber and the liquid crystal full-filled photonic crystal fiber together; then placing the liquid crystal filled photonic crystal fiber on a high-precision digital display constant-temperature heating table, and connecting the single-mode fibers at the two ends of the liquid crystal filled photonic crystal fiber to a broadband light source and a spectrograph respectively; near the liquid crystal clear temperature, the liquid crystal refractive index changes drastically, and then photonic band gap movement is caused. Under the combined action of the photonic band gap and interference, the transmitted spectrum will move violently, and then four main thermo-optical switches S1, S2, S3 and S4 are formed. The thermo-optic switch not only has a high extinction ratio and a wide control range, but also can control two communication window wavebands at the same time.

Description

technical field [0001] The invention relates to the field of liquid crystal full-filled photonic crystal fiber thermo-optic switches, in particular to a liquid crystal fully-filled photonic crystal fiber wide-range multi-band thermo-optic switch and a manufacturing method thereof. Background technique [0002] In the past ten years, with the development of photonic crystal fiber technology, it has played a very important role in communication, sensing, detection and optical devices. Photonic crystal fibers can be divided into two categories according to their light guiding mechanism: total internal reflection photonic crystal fibers and bandgap photonic crystal fibers. The core of photonic crystal fiber with total internal reflection light guiding is solid silica, and the cladding has air holes arranged periodically. These hole-like structures of photonic crystal fibers can be filled with different functional materials to change their transmission characteristics. For exam...

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Problems solved by technology

But the thermo-optic switch they proposed cannot control two communication bands at the same time, and the extinction ratio of the switch is not very high

[0004] At present, this kind of thermo-optic switch with wide range, multi-band and high extinction ratio has not been reported, and it is of great significance to control the thermo-optic switch of two communication bands at the same time.

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