This paper presents a new setup and a corresponding procedure for the accurate measurement of photodarkening in ytterbium doped fibers. The core-pumping scheme enables the use of short samples and a low pump power and the automation of the measurement permits long-term tests for an effective benchmarking of fibers with low photo-degradation. Exploiting temperature-controlled components and coherent detection, this arrangement allows the measurement of transmission drops below 2% over hundreds of hours. For the first time, a long-term photodarkening experiment (up to 450 h) has been carried out and correlated to the drop in output power experienced by a laser using the same type of fiber, demonstrating that the system can be employed in pre-compliance testing of active fibers prior to their use in a laser configuration.
Improved setup and procedure for benchmarking of photodarkening in Ytterbium doped silica fibers / M.OLIVERO; A.BRAGLIA; G.PERRONE; N.G.BOETTI; J.LOUSTEAU; D.MILANESE. - In: JOURNAL OF OPTICS. - ISSN 2040-8978. - STAMPA. - 14:12(2012), pp. 125702-125707. [10.1088/2040-8978/14/12/125702]
|Titolo:||Improved setup and procedure for benchmarking of photodarkening in Ytterbium doped silica fibers|
|Data di pubblicazione:||2012|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1088/2040-8978/14/12/125702|
|Appare nelle tipologie:||1.1 Articolo in rivista|