Erbium-ytterbium co-doped fluorothiophosphate glass single-mode optical fiber as well as preparation method and application thereof
A technology of fluorothiophosphate and single-mode optical fiber, which is applied in glass manufacturing equipment, clad optical fiber, manufacturing tools, etc. It can solve the problems of unfavorable optical fiber device miniaturization, intensification, slow improvement of fiber gain curve, and small unit gain. , to achieve the effect of simple and safe melting process, enhanced transition performance, and low threshold value
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[0057] The present invention also provides a method for preparing the above-mentioned erbium-ytterbium co-doped fluorothiophosphate glass single-mode optical fiber, comprising the following steps:
[0058] Obtain cladding glass blanks and fiber core glass blanks;
[0059] Making the core glass blank material into a core preform, and then preparing the core rod by heating and thinning the core preform;
[0060] The cladding preform is prepared by mechanical cold processing of the cladding glass stock;
[0061] The core rod and the cladding preform rod are assembled, and the erbium-ytterbium co-doped fluorothiophosphate glass single-mode optical fiber is prepared by using a heating and thinning process.
[0062] It can be understood that the fiber core is formed after the core rod is drawn, and the cladding covering the surface of the fiber core is formed after the cladding preform is drawn.
[0063] In some specific examples, the method for obtaining cladding glass stock incl...
Embodiment 1
[0077] This embodiment is an erbium-ytterbium co-doped high-gain fluorothiophosphate glass single-mode optical fiber. The preparation process is as follows:
[0078] (1) Weigh the cladding and core glass raw materials according to the molar percentage, and the cladding component is: KPO 3 55%, Zn(PO 3 ) 2 10%, AlF 3 25%, Na 2 SO 4 10%. The core glass components are: KPO 3 55%, Zn(PO 3 ) 2 10%, AlF 3 22%, Na 2 SO 4 10.5%, ErF 3 1%, YbF 3 1.5%.
[0079] (2) Melt the cladding and core glass respectively, put the raw material (cladding or core glass) weighed in step (1) into an agate mortar and mix thoroughly, then transfer to a platinum crucible and melt at 900°C 4 hours, continuous stirring during the melting process, after that, after homogenization and clarification, the glass liquid was obtained, and then poured into a graphite mold preheated to 250°C for molding, and quickly transferred to an annealing furnace for precision annealing, and kept at 330°C...
Embodiment 2
[0082] This embodiment is a high-gain erbium-ytterbium co-doped fluorothiophosphate glass single-mode optical fiber. The preparation process is as follows:
[0083] (1) Weigh the cladding and core glass raw materials according to the molar percentage, and the cladding component is: KPO 3 44.5%, Zn(PO 3 ) 2 20%, AlF 3 25.5%, Na 2 SO 4 10%. The core glass components are: KPO 3 35%, Zn(PO 3 ) 2 25%, AlF 3 24%, Na 2 SO 4 13.5%, ErF 3 1%, YbF 3 1.5%.
[0084] (2) Melt the cladding and core glass respectively, put the raw material (cladding or core glass) weighed in step (1) into an agate mortar and mix thoroughly, then transfer to a platinum crucible and melt at 950°C After 4 hours of continuous stirring during the melting process, the molten glass was obtained after homogenization and clarification, and then poured into a graphite mold preheated to 320°C for molding, and quickly transferred to an annealing furnace for precision annealing, and kept at 330°C ...
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