We report a theoretical and experimental study of laser coupling in hollow-core, fiber-optic waveguides with small-bore diameters of d=200 µm. For the experiments we utilized three mid-infrared quantum cascade lasers with different emission wavelength, which were coupled into the waveguides using lenses with focal lengths in the range 25-76 mm. Measurements of the output beam profiles and propagation losses were obtained as a function of the coupling conditions. With appropriate coupling parameters, single mode beam delivery can be obtained for all laser wavelengths, ranging from λ ~ 5.4 to 10.5 µm.
|Autori interni:||SPAGNOLO, Vincenzo Luigi|
|Titolo:||Mid-IR quantum cascade laser mode coupling in hollow-core, fiber-optic waveguides with single-mode beam delivery|
|Data di pubblicazione:||2015|
|Nome del convegno:||Conference on Quantum Sensing and Nanophotonic Devices XII|
|Digital Object Identifier (DOI):||10.1117/12.2078960|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|