Ytterbium-phosphate glass for microstructured fiber laser

Stepien, R., Franczyk, M., Pysz, D., Kujawa, I., Klimczak, M., Buczynski, R.

Typ publikacji:
Publikacja naukowa recenzowana (Science Citation Index)


7 (6), 2014, 4723–4738, 10.3390/ma7064723

Jednostka organizacyjna:

In the paper, we report on the development of a synthesis and melting method of phosphate glasses designed for active microstructured fiber manufacturing. Non-doped glass synthesized in a P2O5-Al2O3-BaO-ZnO-MgO-Na2O oxide system served as the matrix material; meanwhile, the glass was doped with 6 mol% (18 wt%) of Yb2O3, as fiber core. The glasses were well-fitted in relation to optical (refractive index) and thermal proprieties (thermal expansion coefficient, rheology). The fiber with the Yb3+-doped core, with a wide internal photonic microstructure for a laser pump, as well as with a high relative hole size in the photonic outer air-cladding, was produced. The laser built on the basis of this fiber enabled achieving 8.07 W of output power with 20.5% slope efficiency against the launched pump power, in single-mode operation M2 = 1.59, from a 53 cm-long cavity.