Abstract
AbstractWe demonstrate a monolithic single frequency Tm-doped fiber amplifier with output power of 51.5 W. A single frequency fiber laser at 1.97 $\mathrm {\mu} $m is amplified by a cascaded master oscillator power amplifier (MOPA) system with all-fiber configuration. The optical-to-optical conversion efficiency of the main fiber amplifier is 45%. No amplified spontaneous emission (ASE) or stimulated Brillouin scattering (SBS) effect is observed in the fiber amplifier. The output power could be further scaled by launching more pump power.
Highlights
Single .frequency .lasers near .2 μm, which play a significant role in many applications such as coherent LIDAR, coherent beam combining, nonlinear frequency conversion, medicine, atmospheric sensing and spectroscopy, have attracted intense interest and have been widely investigated[1,2,3,4,5,6,7,8,9,10,11,12]
Monolithic fiber lasers based on all-fiber configuration possess the advantages of being more stable and practical, so it is really attractive to investigate and develop single frequency fiber lasers near 2 μm employing monolithic fiber configuration[20]
We demonstrate a monolithic single frequency fiber amplifier at 1.97 μm based on master oscillator
Summary
Single .frequency .lasers near .2 μm, which play a significant role in many applications such as coherent LIDAR, coherent beam combining, nonlinear frequency conversion, medicine, atmospheric sensing and spectroscopy, have attracted intense interest and have been widely investigated[1,2,3,4,5,6,7,8,9,10,11,12]. To realize single frequency fiber laser near 2 μm, distributed Bragg reflector (DBR)[15] and distributed-feedback (DFB)[12,19] techniques have been employed, the output power is limited and should be further amplified for practical applications. Most of the reported high power single frequency fiber lasers near 2 μm are achieved based on bulk configuration[3,4]. Monolithic fiber lasers based on all-fiber configuration possess the advantages of being more stable and practical, so it is really attractive to investigate and develop single frequency fiber lasers near 2 μm employing monolithic fiber configuration[20]. We demonstrate a monolithic single frequency fiber amplifier at 1.97 μm based on master oscillator
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