Polymer dispersed liquid crystal optical attenuator array and its production method
A technology of dispersing liquid crystal and optical attenuator, applied in optics, instruments, nonlinear optics, etc., can solve the problems of high cost, large volume, complex structure of MEMS optical attenuator, etc.
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Embodiment 1
[0045] A:
[0046] Using micromachining technology, first according to the design pattern of the concave groove substrate shown in Figure 1, the V-shaped groove array on the two arms of the concave groove substrate, the liquid crystal cell micro groove array on the groove bottom of the concave groove substrate, Custom-made metal molds (stainless steel, aluminum and other metal materials), and then choose anaerobic resin material as the substrate, and shape it through the metal mold; the groove width of the V-shaped groove array is 2.25mm, the ridge width between the grooves is 0.1mm, and the liquid crystal cell is micro Groove size 20mm (length), 6mm (height), 2.5mm (thickness):
[0047] B:
[0048] The selected collimating fiber is provided by Shanghai Zhongke Optical Fiber Communication Devices Co., Ltd. This kind of collimating fiber has good performance of low loss, low reflection and high environmental stability, and can realize the coupling of fiber to fiber well. Its m...
Embodiment 2
[0073] A: Same as Example 1
[0074] B: Same as Example 1
[0075] C: Same as Example 1
[0076] D:
[0077] A, the selection of material is identical with embodiment 1
[0078] b. Weigh liquid crystal, polymer monomer, appropriate amount of diluent and photoinitiator in a dark room. In the mixed solution, the content of liquid crystal material is 65%, the content of photoinitiator is 3%, and the content of polymer monomer and monomer diluent is 32%, change the material ratio of monomer and diluent to 1:1, 1:2, 1:3, 2:1, 3:1, heat and stir under shading conditions, heat the mixture to 60° to make it in each In the isotropic state, stir thoroughly to make it evenly mixed;
[0079] c. Inject the mixed material in the above steps into the closed liquid crystal cell with only 1-2 injection holes in the isotropic state. When it cools down to 40-50°C, use philips 300w ultraviolet light source to carry out The ultraviolet light irradiated the polymerization to induce its phase s...
Embodiment 3
[0084] A: Same as Example 1
[0085] B: Same as Example 1
[0086] C: Same as Example 1
[0087] D:
[0088] a, the selection of materials is the same as in Example 1.
[0089] b. After weighing the selected liquid crystal, polymer monomer, appropriate amount of diluent and photoinitiator in a dark room by a certain weight ratio, the content of photoinitiator in the mixed solution is the same as in Example 1, and the content of liquid crystal is changed to make it 55% respectively. %, 65%, 75%, 85%, the remaining mixed solution is a mixture of polymer monomer and monomer diluent material, the ratio of monomer and diluent is still 1:1, heating and stirring under shading conditions, the mixture Heat to 60° to make it in an isotropic state and stir well to make it evenly mixed.
[0090] c, same as embodiment 1
[0091] Table 4: The highest light transmittance and applied voltage data of the light attenuator when the amount of liquid crystal, monomer and diluent is different ...
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