Article
Lasing in thulium doped polarizing photonic crystal fibers (PCF)
CREOL, The College of Optics and Photonics, Univ. of Central Florida (USA) and West Saxon Univ. of Applied Sciences (Germany)
We describe lasing in polarizing thulium doped PCF fiber for the first time. The ~4 m long fiber had 50/250 μm core/cladding diameters and hole-diameter to pitch ratio of 0.18. CW lasing was achieved by end pumping with a 793 nm diode in an oscillator configuration. Slope efficiencies of ~35 % have been obtained with single mode beam quality (M2 <1.15).
The polarization extinction ratio (PER) was >13 dB without any intra-cavity polarizing elements. This fiber, with MFD of ~36 μm and ~5.8 dB/m cladding pump absorption, is an attractive option for high energy pulsed amplifiers in the 2 μm wavelength regime.
Language: | Undetermined |
---|---|
Year: | 2012 |
Pages: | 82372Z-4 |
ISSN: | 1996756x and 0277786x |
Types: | Article |
DOI: | 10.1117/12.909440 |