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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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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, the present invention places the fiber grating in a guide rail so that it can be stretched freely, and at the same time restricts it from compressing. bending

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Embodiment Construction

[0039] The structure of forming the inner chamber 6 of the guide rail 3 is as follows: image 3 , 4 , 5, and 6. The driving structure used is 1 such as Figure 7 shown.

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

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

[0042] Figure 9 It is the recovery curve of the tuning device of the present invention. It ...

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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.

Description

Technical field: [0001] The invention relates to a two-way stress tuning device of an optical fiber grating, which is mainly used for tuning the peak wavelength of the optical fiber grating. In particular, it relates to the stress-driven structure in the tuning device and the guide rail structure to avoid bending of the optical fiber during tuning to shortwave. Background technique: [0002] A fiber grating is a periodic refractive index profile fabricated inside the core of a single-mode silica fiber. It has narrow-band reflection characteristics, and has low insertion loss, small size, and high reliability during use. It can be directly connected to optical fiber systems. It is widely used in optical fiber information technology, such as optical fiber communication, optical fiber sensing, and optical fiber interferometry. Applications. It can be used for frequency selection and frequency stabilization components of semiconductor lasers and fiber lasers; for optical add-d...

Claims

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Application Information

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IPC IPC(8): G02B6/34
Inventor 方祖捷赵岭蔡海文
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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