Back to Search
Start Over
Record power and efficient mid-infrared supercontinuum generation in germania fiber with high stability
- Source :
- High Power Laser Science and Engineering. 10
- Publication Year :
- 2022
- Publisher :
- Cambridge University Press (CUP), 2022.
-
Abstract
- We report the demonstration of a mid-infrared (MIR) supercontinuum (SC) laser delivering a record-breaking average output power of more than 40 W with a long-wavelength edge up to 3.5 μm. The all-fiberized configuration was composed of a thulium-doped fiber amplifier system emitting a broadband spectrum covering 1.9–2.6 μm with pulse repetition rate of 3 MHz, and a short piece of germania fiber. A 41.9 W MIR SC with a whole spectrum of 1.9–3.5 μm was generated in a piece of 0.2-m-long germania fiber, with a power conversion efficiency of 71.4%. For an even shorter germania fiber (0.1 m), an SC with even higher output power of 44.9 W (corresponding to a conversion efficiency of 76.5%) was obtained, but the energy conversion toward the long-wavelength region was slightly limited. A continuous operation for 1 hour with output power of 32.6 W showed outstanding power stability (root mean square 0.17%) of the obtained SC laser. To the best of the authors’ knowledge, for the first time, this work demonstrates the feasibility of germania fiber on generating a 40-W level MIR SC with high efficiency and excellent power stability, paving the way to real applications requiring high power and high reliability of MIR SC lasers.
Details
- ISSN :
- 20523289 and 20954719
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- High Power Laser Science and Engineering
- Accession number :
- edsair.doi...........b1dfbd54755273f46085cc3fe7816341