ISSN:
1572-9559
Keywords:
mid-infrared
;
fiber laser
;
codoping
;
fluoride fiber
;
erbium
;
praseodymium
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We report highly efficient CW fiber lasers at 2.7µm in an Er3+-doped and weakly Pr3+-codoped fluorozirconate fiber. The fiber lasers were pumped in three pump wavelength ranges around 650, 795 and 980 nm. Higher output powers of nearly 30 mW and a broader potential tuning range of 180 nm compared to Er3+ singly doped fiber lasers are demonstrated. Laser efficiencies of more than 13% were achieved. It is shown that the fiber laser can be tuned to longer wavelengths by increasing the pump power or, in certain cases, by increasing the pump wavelength. Furthermore, we present the wavelength tuning of the Er3+:Pr3+-codoped system by an external grating. The relationships between laser wavelength and pump rates are described, and the reasons for the improvements with Pr3+-codoping are given.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02096058
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