Preparation method of Nd < 3 + >-doped silica fiber with inner cladding doped with Pr < 3 + >

• Main Authors: CHEN YINGGANG, DONG HEHE, WANG SHIKAI, YU CHUNLEI, LU YUJIE, HU LILI, WANG YAFEI
• Format: Patent
• Language: Chinese; English
• Published: 07.06.2024
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

The invention provides a preparation method of an Nd < 3 + >-doped quartz optical fiber with an inner cladding doped with Pr < 3 + >, which comprises the following steps: preparing large-size rare earth-doped quartz glass by combining a sol-gel method with a high-temperature sintering technology, and then preparing the Pr < 3 + >-doped cladding outside an Nd < 3 + >-doped quartz core rod by a sol dip-coating method to form an optical fiber preform; finally, the Nd < 3 + >-doped quartz optical fiber with the inner cladding doped with the rare earth elements is drawn through a tube rod method, all doping areas of the drawn optical fiber are distinguished obviously, a good cutting effect is shown in a spectrum experiment, a key core material is provided for obtaining 900nm optical fiber laser, and the optical fiber has a good application prospect. And a key and reliable optical fiber preparation technology is provided for subsequent application and development of optical fiber'spectral scissors'. 本发明提出一种内包层掺Pr3+