Bidirectional stress tuner of optical fibre raster

A fiber grating, bidirectional stress technology, applied in the direction of coupling of optical waveguides, can solve the problems of easy bending and deformation of fiber grating, and achieve the effect of uniform stress

Inactive Publication Date: 2002-03-06

SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI

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AI-Extracted Technical Summary

Problems solved by technology

[0008] In order to overcome the above-mentioned problem in the prior art that the fiber grating is easily bent and deformed when the fiber grating is compressed...

Abstract

A bidirectional stress tuner of optical fibre raster for tuning peak wavelength of optical fibre raster is composed of the first and the second horizontal arms for fixing the optical fibres at both end of raster to them, and guide track with normal triangular internal cavity for containing said raster in it. Said two horizontal arms are electromagnetically coupled to drive mechanism to move closeto or far from each other, so compressing or stretching the raster. Its advantages include uniform stress, no deformation, no increasement of reflection bandwidth, and better turning renaturation.

Application Domain

Coupling light guides

Technology Topic

Internal cavityLength wave +2

Image

Examples

Experimental program(1)

Example Embodiment

[0039] The structure of the inner cavity 6 of the guide rail 3 is as follows: image 3 , 4 , 5 and 6. The driving structure adopted is 1 such as Figure 7 Shown.

[0040] The specific parameters of the fiber grating 5, a uniform fiber Bragg grating with a length of 10mm, with a center wavelength of 1551.2nm and a reflectivity greater than 90%, the results obtained are as follows Figure 8 , Picture 9 Shown.

[0041] Figure 8 It is the tuning spectrum diagram of the tuning device of the present invention when the current in the electromagnetic coil is 300 mA. It can be seen from the figure that the Bragg reflection peak of the fiber grating 5 reaches the position A from position B during the tuning process, and the tuning amount is 1.38 nm. It is worth noting that the reflection spectrum bandwidth has basically not changed, and the channel isolation has reached Above 15dB.

[0042] Picture 9 This is the recovery curve of the tuning device of the present invention. It can be seen that the good recovery of the magnetic field tuning can enable the Bragg wavelength of the fiber grating 5 to be accurately controlled. The above results show that the tuning device has the above advantages.

PUM

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Classification and recommendation of technical efficacy words

Uniform stress