Coupling external cavity mid-IR quantum cascade lasers with low loss hollow metallic/dielectric waveguides

Abstract

We report on the optical coupling between hollow core waveguides and external cavity mid-IR quantum cascade lasers (QCLs). Waveguides with 1000 μm bore size and lengths ranging from 2 to 14 cm, with metallic (Ag)/dielectric (AgI or polystyrene) circular cross-section internal coatings, have been employed. Our results show that the QCL mode is perfectly matched to the hybrid HE11 waveguide mode, demonstrating that the internal dielectric coating thickness is effective to suppress the higher losses TE-like modes. Optical losses down to 0.44 dB/m at 5.27 μm were measured in Ag/polystyrene-coated waveguide with an almost unitary coupling efficiency.


Tutti gli autori

  • Patimisco P. , Spagnolo V. , Vitiello M. S. , Tredicucci A. , Scamarcio G. , Bledt C. M. , Harrington J. A.

Titolo volume/Rivista

APPLIED PHYSICS. B, LASERS AND OPTICS


Anno di pubblicazione

2012

ISSN

0946-2171

ISBN

Non Disponibile


Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile


Numero di citazioni Scopus

16

Ultimo Aggiornamento Citazioni

2017-04-22 03:20:59


Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile