CN1632634A - Optical fiber grating template with long stress cycle and fabricating method thereof - Google Patents

Abstract

This invention relates to a method to process stress long circle fiber grating module plate, especially to a new method to process fiber grating by use of mechanical stress which is used in fiber communication, filter gain flatness device and sensors. The technique scheme is the following: the stress module is a rectangle organic glass plate with circle strip; to wind the copper wire along the glass plate according to strip image; to put the glass plate after winding to two parallel extra fibers and usual fiber; to exert pressure on the glass plate by use of sprig device.

Description

Optical fiber grating template with long stress cycle and preparation method thereof

Technical field

The present invention relates to a kind of method of making optical fiber grating template with long stress cycle, particularly utilize mechanical stress to make the new method of fiber grating, in optical fiber communication, be applied on wave filter, flat gain device, the sensor.

Background technology

Someone has proposed to utilize the flat board that has groove to make long period fiber grating, also the someone proposes to utilize the graphite rod array to make long period fiber grating, these methods have certain tunability, but making has the dull and stereotyped of groove and is not easy, and machinery production is required high.And the cycle of the long period fiber grating that the graphite array is made is exactly diameter or its integral multiple of graphite rod, and is poor for the tuning performance of the shape of long period fiber grating harmonic peak.

Summary of the invention

Purpose of the present invention: improve the tunability of present method, realize flexible to long period fiber grating spectrum.

Technical scheme of the present invention: this optical fiber grating template with long stress cycle is characterized in: a rectangle poly (methyl methacrylate) plate, have the cycle striated pattern on it, and according to striated pattern copper wire is wrapped on the glass plate.

The method for making of this long period fiber grating stress template, pass through following step:

1) processes a poly (methyl methacrylate) plate earlier;

2) utilize software Aotucad to produce a rectangle striated pattern that has the cycle striped, the size of rectangle is identical with the one side size of poly (methyl methacrylate) plate;

3) rectangle striped graphic printing is sticked on the poly (methyl methacrylate) plate face;

4) according to the striated pattern in the rectangle copper wire is wrapped on the glass plate;

Beneficial effect of the present invention: the long period fiber grating that this method is made has very big tunability, the harmonic peak intensity of grating can be regulated by the size of external force, and can make multiple special long period fiber grating, for example warble, the long period fiber grating of phase shift, cascade etc., realized adjusting to the grating spectrum shape.Experimental provision is simple, and material therefor also is a common material, and is not expensive.Simultaneously, optical fiber is not degenerated because applying external force, and grating just no longer exists after withdrawing external force, has realized wiping of grating, and used optical fiber is common communication unit mode fiber, does not need special photosensitivity optical fiber.So this is a kind of tunable, restructural, the new method of simple cheap making long period fiber grating.

Description of drawings

Fig. 1. stick on the pattern on the glass plate

Fig. 2. the experimental provision synoptic diagram

Fig. 3. the template synoptic diagram

Wherein:

1. glass plate 2. striated patterns 3. pressure 4. wideband light sources 5. spectrometers 6. extra optical fiber 7. ordinary optic fibres

Embodiment

Below in conjunction with accompanying drawing the present invention is made specific description.

This optical fiber grating template with long stress cycle is characterized in: a rectangle poly (methyl methacrylate) plate 1, have cycle striated pattern 2 on it, and according to striated pattern copper wire is wrapped on the glass plate.

The method for making of this optical fiber grating template with long stress cycle is characterized in that passing through following step:

1) processes a poly (methyl methacrylate) plate 1 earlier;

1) utilize software Aotucad to produce a rectangle striated pattern 2 that has the cycle striped, the size of rectangle is identical with the one side size of poly (methyl methacrylate) plate;

2) rectangle striped graphic printing is sticked on the poly (methyl methacrylate) plate face;

3) according to the striated pattern in the rectangle copper wire is wrapped on the glass plate;

Concrete procedure of processing: at first process a poly (methyl methacrylate) plate, the length of the long period fiber grating that the size of plate is optionally made and deciding, next utilizes software Aotucad to produce a rectangle that has the cycle striped, and the size of rectangle is identical with the one side size of poly (methyl methacrylate) plate, as shown in Figure 1.Then rectangle is printed and sticked on the poly (methyl methacrylate) plate face, utilize and mechanical or manually copper wire is wrapped on the glass plate according to the striated pattern in the rectangle, glass plate after will twining at last places on two optical fiber placed side by side, utilize spring assembly on glass plate, to exert pressure, in spectrometer, observe the spectrogram of long period fiber grating, as shown in Figure 2.

Above glass plate, apply uniform pressure, thereby in optical fiber, produce periodic stress, caused producing periodic index modulation in the fibre core, finally in optical fiber, form long period fiber grating.

Utilize curve of software for mathematical computing Matlab simulation, make optical fiber when this curve is placed, can in the cycle of the long period fiber grating that forms, introduce and warble, the size of chirp value and linear, non-linear curve decision of coming out by simulation.

When making the phase shift long period fiber grating, between the copper wire of intercycle on the glass plate, introduce a certain amount of free displacement, just can be implemented in the spectrogram of grating and introduce phase shift.The position of phase shift also can be chosen in other places of grating, and only need move at one section of the adding between the copper wire of relevant position and get final product this moment.

With twice below of an optical fiber by glass plate, just realized the cascade of grating, parallel by two optical fiber of glass plate below, be exactly the cascade of synperiodic long period fiber grating.Change the angle between optical fiber and the copper wire, just can realize the cascade of the grating of different cycles.

Claims (2)

1. optical fiber grating template with long stress cycle is characterized in that: a rectangle poly (methyl methacrylate) plate (1), have cycle striated pattern (2) on it, and according to striated pattern copper wire is wrapped on the glass plate.

2. the method for making of an optical fiber grating template with long stress cycle is characterized in that passing through following step:

1) at first processes a poly (methyl methacrylate) plate (1);

2) utilize software Aotucad to produce a rectangle striated pattern (2) that has the cycle striped, the size of rectangle is identical with the plate face size of poly (methyl methacrylate) plate;

3) rectangle striped graphic printing is sticked on the poly (methyl methacrylate) plate face;

4) according to the striated pattern in the rectangle copper wire is wrapped on the glass plate.

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