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Metallized optical fibre distributed microheater for temp tuning of optical fibre device

A technology of optical fiber distribution and optical fiber devices, which is applied in the coupling of optical waveguides, instruments, optics, etc., can solve problems such as non-functionality, and achieve the effect of fast heating speed and small total heat capacity

Inactive Publication Date: 2004-07-28
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Above-mentioned prior art all does not have such function

Method used

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  • Metallized optical fibre distributed microheater for temp tuning of optical fibre device
  • Metallized optical fibre distributed microheater for temp tuning of optical fibre device
  • Metallized optical fibre distributed microheater for temp tuning of optical fibre device

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Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 2 structure shown. The number N=2 of electrodes 5 . The metal heating layer 2 is directly coated on the outer surface of the bare optical fiber 3 by vacuum coating. The outer periphery of the metal heating layer 2 is covered with an insulating layer 8 made of high temperature resistant material. The control circuit 6 has the above-mentioned first structure.

Embodiment 2

[0037] See image 3 structure shown. Using vacuum evaporation technology, a titanium-platinum thin film is plated on the surface of the UV-refractive fiber grating 10 as the transition layer 11; a nickel metal layer is electroplated on the outer surface of the titanium-platinum film as the metal heating layer 2. The transition layer 11 of the titanium-platinum thin film is mainly used to make the nickel metal heating layer 2 and the fiber grating 10 more tightly combined. Two electrodes 5 are soldered with lead at the two ends of the nickel-plated layer, and the control circuit 6 adopts the above-mentioned first structure. A current can be applied between the two electrodes 5 for tuning. Figure 4 is the transmission spectrum curve of the fiber grating 10 changing with the heating current. Figure 5 It is a function of the peak wavelength changing with the working current. It can be seen that the wavelength shift is basically proportional to the square of the current. 1 n...

Embodiment 3

[0039] Such as Figure 7 structure shown. The control circuit 6 adopts the above-mentioned first structure. The control circuit 6 adopts a conventional thyristor rectifier circuit and a thermistor sensing structure. The temperature distribution can be controlled. 602 in the figure is a silicon controlled rectifier, 601 is a switch circuit, or a pulse signal driver, 603 is a voltage dividing coil of an output step-down transformer 604 . 605 is a trigger controller composed of a temperature comparison circuit and a thyristor trigger circuit, and has a digital signal processor (DSP) or a computer interface 13. 604 is a multi-group output step-down transformer for supplying power to the distributed heating layer 2 . The 12th, the semiconductor refrigerator cold head is as the refrigeration layer, regulates its temperature and can change the tuning speed. The number of electrodes 5 is N=5, and the metal heating layer 2 is composed of N=4 heating units 201 connected in series. ...

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PUM

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Abstract

A metallized optical fibre microheater for tuning fibre raster and modulating refractivity of optical fibre features that a metallic heating layer is made on the external surface of raster or optical fibre and N electrodes are uniformly arranged on said metallic heating layer to divide it into N-1 serial heating units. Each unit has a temp sensing element. Said electrodes and temp sensing elements are connected to control circuit. The temp of heating layer is controlled by computer. Its advantages are high heating efficiency and speed, and different temps in axial direction.

Description

Technical field: [0001] The invention relates to an optical fiber device, in particular to a metallized optical fiber distributed micro heater used for temperature tuning of the optical fiber device. Background technique: [0002] Various fiber optic devices, such as fiber gratings and fiber interferometers, play an important role in fiber tuning and fiber sensing technologies. The wavelength tuning characteristics of these devices are properties of great concern in practical applications. Fiber Bragg Grating is a narrow-band reflective filter, and its peak position can be tuned in practical applications. Especially in DWDM communication systems, tunable light sources and tunable filters are required. In the chirped fiber grating dispersion compensation device and the long-period fiber grating gain flattening filter, it is necessary to dynamically adjust its central wavelength and dispersion compensation amount, and dynamically adjust the gain spectrum curve. In these app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/34G02F1/01G02F1/17G02F1/19H04J14/02
Inventor 方祖捷耿健新李琳赵岭
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI