ISSN:
1432-0649
Keywords:
PACS: 42.55.R; 42.60B; 42.60D
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract. We describe a comparative study related to an influence of a feedback coupling on operating characteristics of a cw Cr3+:LiSrAlF6 (Cr3+:LiSAF) laser using an end-coupled fiber grating with different coupling configurations. To achieve a compact construction, a direct butt-coupling of the fiber grating at the pump end of the Cr3+:LiSAF laser and pumping through the same fiber was considered. The feedback provided by the coupled fiber grating through an end mirror was responsible for a spectrally narrowed output with a slope efficiency of 11%. However, the performance critically depended on an amount of the feedback coupling. The feedback-coupling condition was improved considerably by using a lens-coupled fiber grating at the pump end of the Cr3+:LiSAF crystal. A spectrally narrowed output of ≈0.15 cm-1 was obtained, and the output slope efficiency was measured as 27%. Theoretical modeling was also performed to understand the effect of the feedback coupling and the results agreed well with the experimental observations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s003400050058
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