Electric heating device and system

Abstract

The invention discloses an electric heating device and system. The device comprises a heating body, two electrodes and a ceramic shell, wherein the two electrodes are connected to the two ends of the heating body, a cavity is formed inside the ceramic shell, the heating body is placed in the cavity, a notch which penetrates through the thickness direction of the ceramic shell and is communicated with the cavity is formed in the top of the ceramic shell, and the heating body is of a spiral structure. Due to the position of the spiral structure, the spiral axis of the spiral structure is approximately perpendicular to the extending direction of the notch from top to bottom, and a pair of twisted optical fibers extending in the thickness direction of the ceramic shell can enter the position between two spiral rings of the spiral structure downwards from the notch. Due to the facts that the electric-heating mode is adopted in the electric heating device, the heating body is of the spiral structure and is clamped by the ceramic shell, and the optical fibers are heated between the two spiral rings of the spiral structure, heating is even and stable, and the defect that flame heating is not stable or even enough is overcome. Meanwhile, temperature heat stress and structural heat stress are distributed reasonably, and positions with stress concentration do not exist.

Description

technical field [0001] The invention relates to electric heating technology, in particular to an electric heating device and system for melting tapers. Background technique [0002] Fused tapered optical fiber device is the most representative of optical fiber devices and a basic device that constitutes other devices, and its corresponding manufacturing process is fused tapered technology. Fused tapered technology can be applied to various optical passive devices, such as optical fiber couplers, optical wavelength division multiplexers, optical fiber reflectors, optical fiber polarization beam splitters, optical attenuators, etc. [0003] At present, the heating system for fusion tapering generally adopts the flame heating method. The basic process is as follows: two single-mode optical fibers with the coating layer removed are brought together, heated and melted under a high-temperature flame, and stretched to both sides at the same time to produce A two-way conical struct...

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Problems solved by technology

However, flame heating inevitably has the following disadvantages: flame heating is unstable, disturbed by the environment, and easy to drift, resulting in poor performance consistency of optical fiber devices. It is also affected by the gas pressure in the tank, and the percentage of hydrogen and oxygen needs to be adjusted frequently ; The temperature adjustment range of the flame is narrow and difficult to control, and often fails to meet the expected requirements; flame heating will generate OH- ions, which will increase the loss of optical fiber devices when it enters the optical fiber, and reduce the reliability of the optical fiber; high-purity gas is not safe , and expensive

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