The IAP at the University of Jena wants to procure Tm-doped special fibers for future developments and commission a development project for this purpose. The subject of the development contract is the production of Tm-doped single-mode single-core fibers as well as a derived single-mode multi-core fiber with 16 cores based on the findings. For this purpose, Tm-doped preforms are to be homogenized and adjusted in the refractive index jump in order to achieve SM operation at the application wavelength. Furthermore, it is to be investigated whether the resulting laser physical properties are positively influenced by the use of highly doped cladding materials. After evaluation of the manufactured fibers by the customer, the findings are to be transferred to the production of a multi-core fiber (number of cores 16). In their production, the additive structure of Tm-doped and passive quartz glass rods as well as by introducing Tm-doped rods into subtractively manufactured grid structures will be compared.
In the case of the multi-core fiber, the 16 cores are to be arranged on a square grid and each core is to achieve at least the optical properties of the single-core fiber. During the development of the multi-core fiber, a comparison must be made between the additive construction of the rectangular grid structure and the filling of the holes inserted into the cladding material in the corresponding drill grid in order to gain insights into the optimal manufacturing strategy. All fibres must be produced as rods (fibre diameter > 1 mm) without additional polymer coating.

LOT-0001
EU-VV/2024-41
Production of Tm-doped single-mode single-core fibers as well as a derived single-mode multi-core fiber with 16 cores based on the findings.
The IAP of the University of Jena wants to procure Tm-doped special fibers for future developments and commission a development project for this purpose. The subject of the development contract is the production of Tm-doped single-mode single-core fibers as well as a derived single-mode multi-core fiber with 16 cores based on the findings. For this purpose, Tm-doped preforms are to be homogenized and adjusted in the refractive index jump in order to achieve SM operation at the application wavelength. Furthermore, it is to be investigated whether the resulting laser physical properties are positively influenced by the use of highly doped cladding materials. After evaluation of the manufactured fibers by the customer, the findings are to be transferred to the production of a multi-core fiber (number of cores 16). In their production, the additive structure of Tm-doped and passive quartz glass rods as well as by introducing Tm-doped rods into subtractively manufactured grid structures will be compared.
In the case of the multi-core fiber, the 16 cores are to be arranged on a square grid and each core is to achieve at least the optical properties of the single-core fiber. During the development of the multi-core fiber, a comparison must be made between the additive construction of the rectangular grid structure and the filling of the holes inserted into the cladding material in the corresponding drill grid in order to gain insights into the optimal manufacturing strategy. All fibres must be produced as rods (fibre diameter > 1 mm) without additional polymer coating.