Preparation method of silica-base broadband saturable absorber device
A silica-based, saturable absorption technology, applied in the field of optics, can solve the problems of poor work stability and low optical damage threshold, and achieve the effect of low cost, simple principle, and improved optical damage threshold
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Embodiment 1
[0027] A method for preparing a silicon dioxide-based broadband saturable absorption device, comprising the following steps:
[0028] Step 1: Prepare a dispersion: mix 9.3 g of tetraethyl orthosilicate, 8.3 g of ethanol, 135 mg of carbon nanotubes and 6.5 mL of N,N-dimethylacetamide to prepare a dispersion;
[0029] Step 2: Preparation of broadband saturable absorber sol: ultrasonically oscillate the dispersion in step 1 for 15 min to make it evenly mixed, then add 3.2 g of water, then adjust the pH value to 2-3 with hydrofluoric acid, and continue to oscillate for 40 min until tetraethyl orthosilicate is fully hydrolyzed and polycondensed to obtain a broadband saturable absorber sol;
[0030] Step 3: Preparation of broadband saturable absorber device: drip-coat the broadband saturable absorber sol prepared in step 2 on the D-shaped area of the polished D-shaped optical fiber, put it into a covered organic plastic petri dish, and leave it at room temperature After 4 days, u...
Embodiment 2
[0032] A method for preparing a silicon dioxide-based broadband saturable absorption device, comprising the following steps:
[0033] Step 1: Prepare a dispersion: mix 9 g of tetraethyl orthosilicate, 8 g of ethanol, 150 mg of graphene and 6 mL of N,N-dimethylacetamide to prepare a dispersion;
[0034] Step 2: Prepare broadband saturable absorber sol: ultrasonically oscillate the dispersion in step 1 for 20 min, mix it evenly, add 3 g of water, adjust the pH value to 2-3 with hydrofluoric acid, and continue ultrasonic oscillation for 60 min min until tetraethyl orthosilicate is fully hydrolyzed and polycondensed to obtain a broadband saturable absorber sol;
[0035] Step 3: Preparation of broadband saturable absorber device: drip-coat the broadband saturable absorber sol prepared in step 2 on the D-shaped area of the polished D-shaped optical fiber, put it into a covered organic plastic petri dish, and leave it at room temperature After 5 days, until the broadband saturable...
Embodiment 3
[0037] A method for preparing a silicon dioxide-based broadband saturable absorption device, comprising the following steps:
[0038] Step 1: Prepare a dispersion: mix 10 g of tetraethyl orthosilicate, 9 g of ethanol, 115 mg of bismuth telluride (a type of topological body) and 7 mL of N,N-dimethylacetamide to make a dispersion;
[0039] Step 2: Preparation of broadband saturable absorber sol: ultrasonically oscillate the dispersion in step 1 for 5 min to make it evenly mixed, then add 4 g of water, then adjust the pH value to 2-3 with hydrofluoric acid, and continue to oscillate for 60 min until tetraethyl orthosilicate is fully hydrolyzed and polycondensed to obtain a broadband saturable absorber sol;
[0040] Step 3: Preparation of broadband saturable absorber device: drip-coat the broadband saturable absorber sol prepared in step 2 on the D-shaped area of the polished D-shaped optical fiber, put it into a covered organic plastic petri dish, and leave it at room temperatu...
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