Fabrication method of micro-nano optical fiber based on multi-step intermittent stretching to stimulate multi-mode interference
A technology of multi-mode interference and micro-nano fiber, which is applied in the direction of glass manufacturing equipment, manufacturing tools, etc., can solve the problems of difficult-to-excite multi-mode interference micro-nano fiber preparation, time and material consumption, complex repeatability, etc., to achieve The effect of low cost, simple method and stable structure
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[0031] A micro-nano optical fiber preparation method based on multi-step intermittent stretching to stimulate multi-mode interference, comprising the following steps:
[0032] (1) Stretch the uniformly heated optical fiber with a length of 7mm to 15mm along the axial direction and simultaneously stretch it to the opposite direction by 0.5mm to 1.0mm within 0.1s to 0.5s;
[0033] (2) Pause for 0.5s to 1s after completing a stretch, so that the stretched optical fiber is heated evenly again;
[0034] (3) Step (1) and step (2) are repeated 18-30 times in order until a micro-nano optical fiber with a waist diameter of 2.37-3.54 μm for exciting multi-mode interference is obtained.
[0035] Such as figure 2 As shown, the preparation device adopted in the micro-nano optical fiber preparation method based on multi-step intermittent stretching excitation multi-mode interference includes two three-dimensional adjustment frames 4 and a heating device 3 located in the middle of the thre...
Embodiment 1
[0037] To prepare a micro-nano optical fiber that stimulates multi-mode interference with a commonly used silica standard single-mode optical fiber, the steps are as follows:
[0038] 1. If figure 2 As shown, first remove the coating layer from the silica standard single-mode optical fiber 1 and fix it with the optical fiber clamp 7, and then make it collimated by adjusting, that is, no force in the lateral direction, and the length of the optical fiber between the two optical fiber clamps is 10cm.
[0039] 2. Use the heating device 3 to heat a silica standard single-mode optical fiber with a length of about 7 mm, and keep it for 30 seconds so that the optical fiber is fully heated to a molten state (about 1650 (±50) ° C).
[0040] 3. Turn the axial tension knob 5 of the three-dimensional adjustment frame 4 to make the two optical fiber clamps move in the same way in the opposite direction along the axial direction, such as image 3 As shown, the specific steps are as follow...
Embodiment 2
[0045] 1. First remove the coating layer from the silica standard single-mode optical fiber 1 and fix it with the optical fiber clamp 7, and then make it collimated by adjusting, that is, no force in the lateral direction. The length of the optical fiber between the two optical fiber clamps is 10cm.
[0046] 2. Use the heating device 3 to heat the silica standard single-mode optical fiber with a length of about 15 mm, and keep it for 30 seconds so that the optical fiber is fully heated to a molten state (about 1650 (±50) ° C).
[0047] 3. Turn the axial tension knob 5 of the three-dimensional adjustment frame 4 to make the two optical fiber clamps move in the same way in the opposite direction along the axial direction. The specific steps are as follows: (1) Move 1.0mm rapidly within 0.5s . (2) Pause the movement and keep it for 0.5s. (3) Repeat the above process 18 times.
[0048] Figure 6 The transmission spectrum of a micro-nano fiber with a length of 2.6cm, a diameter ...
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