Low-Loss Hollow Waveguide Fibers for Mid-Infrared Quantum Cascade Laser Sensing Applications

Sensors

Pietro Patimisco¹  Vincenzo Spagnolo¹  Miriam S. Vitiello³  Gaetano Scamarcio¹  Carlos M. Bledt² 

[1] CNR-IFN and Dipartimento Interateneo di Fisica, Università and Politecnico di Bari, Via Amendola 173, I-70126 Bari, Italy; E-Mails:;Department of Material Science & Engineering, Rutgers University, Piscataway, NJ 08855, USA; E-Mails:;CNR-Dipartimento di Scienze Fisiche e Tecnologie della Materia, Largo E. Fermi 5, 50125 Firenze, Italy; E-Mail:

关键词: hollow glass waveguide;    quantum cascade laser;    gas sensing;    quartz enhanced photoacoustic spectroscopy;   

DOI  :  10.3390/s130101329

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.