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- Title
Low-Loss Hollow Waveguide Fibers for Mid-Infrared Quantum Cascade Laser Sensing Applications.
- Authors
Patimisco, Pietro; Spagnolo, Vincenzo; Vitiello, Miriam S.; Scamarcio, Gaetano; Bledt, Carlos M.; Harrington, James A.
- Abstract
We report on single mode optical transmission of hollow core glass waveguides (HWG) coupled with an external cavity mid-IR quantum cascade lasers (QCLs). The QCL mode results perfectly matched to the hybrid HE11 waveguide mode and the higher losses TE-like modes have efficiently suppressed by the deposited inner dielectric coating. Optical losses down to 0.44 dB/m and output beam divergence of ~5 mrad were measured. Using a HGW fiber with internal core size of 300 µm we obtained single mode laser transmission at 10.54 µm and successful employed it in a quartz enhanced photoacoustic gas sensor setup.
- Subjects
HOLLOW fibers; WAVEGUIDES; QUANTUM cascade lasers; INFRARED lasers; DIELECTRICS; COATING processes; ACOUSTOOPTICAL devices; GAS detectors
- Publication
Sensors (14248220), 2013, Vol 13, Issue 1, p1329
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s130101329