Abstract
In this paper, a cladding-pumped erbium-ytterbium co-doped random fiber laser (EYRFL) operating at 1550 nm with high power laser diode (LD) is proposed and experimentally demonstrated for the first time. The laser cavity includes a 5-m-long erbium-ytterbium co-doped fiber that serves as the gain medium, as well as a 2-km-long single-mode fiber (SMF) to provide random distributed feedback. As a result, stable 2.14 W of 1550nm random lasing at 9.80 W of 976 nm LD pump power and a linear output with the slope efficiency as 22.7% are generated. This simple and novel random fiber laser could provide a promising way to develop high power 1.5 µm light sources.
Highlights
Random fiber lasers (RFLs) operating via the Rayleigh scattering along a single mode fiber (SMF) as the random distributed feedback attract a great deal of attention since the first demonstration in 2010 [1, 2]
After the pump power is increased over the threshold, the lasing power increases linearly as expected with the slope efficiency of about 22.7 %
The laser efficiency could be improved by optimizing the erbiumytterbium co-doped fiber and single-mode fiber (SMF)’s length
Summary
Random fiber lasers (RFLs) operating via the Rayleigh scattering along a single mode fiber (SMF) as the random distributed feedback attract a great deal of attention since the first demonstration in 2010 [1, 2]. This kind of random lasers has certain advantages, such as single transverse mode output, long-distance signal delivery ability, low intensity noise, cavity simplicity, and high lasing efficiency. The loss introduced in the long SMF will decrease the laser efficiency, Article type: Regular
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