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
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[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...
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