TY - GEN
T1 - Design and theoretical analysis of optical waveguides of quantum cascade laser at λ~ 9.5 μm
AU - Ko, Y. H.
AU - Park, B. D.
AU - Yu, J. S.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - We report the design and theoretical analysis of optical waveguides of the InP-based quantum cascade laser (QCL) operating at λ~ 9.5 μm. The effective refractive index, optical confinement and absorption coefficient are calculated by using the finite element method (FEM). From FEM simulations, the effect of the number of active/injector stages (Ns) on the optical confinement and waveguide loss of QCLs was investigated. As the Ns in QCLs increased from Ns = 30 to Ns = 70 for the 19 μm wide QCLs structure, the optical confinement was improved from 73.6 % to 90.6 % and the absorption coefficient was reduced from 3.91 cm-1 to 1.47 cm-1. However, the Ns should be optimized considering the heat generated within the active region because the increase in Ns causes a large voltage rise. The influence of ridge width on the optical confinement and absorption coefficient in QCLs with SiO2 and Si3N4 insulation layers was also studied.
AB - We report the design and theoretical analysis of optical waveguides of the InP-based quantum cascade laser (QCL) operating at λ~ 9.5 μm. The effective refractive index, optical confinement and absorption coefficient are calculated by using the finite element method (FEM). From FEM simulations, the effect of the number of active/injector stages (Ns) on the optical confinement and waveguide loss of QCLs was investigated. As the Ns in QCLs increased from Ns = 30 to Ns = 70 for the 19 μm wide QCLs structure, the optical confinement was improved from 73.6 % to 90.6 % and the absorption coefficient was reduced from 3.91 cm-1 to 1.47 cm-1. However, the Ns should be optimized considering the heat generated within the active region because the increase in Ns causes a large voltage rise. The influence of ridge width on the optical confinement and absorption coefficient in QCLs with SiO2 and Si3N4 insulation layers was also studied.
UR - https://www.scopus.com/pages/publications/85087602711
U2 - 10.1364/acp.2009.wj3
DO - 10.1364/acp.2009.wj3
M3 - Conference contribution
AN - SCOPUS:85087602711
SN - 9781557528773
T3 - Optics InfoBase Conference Papers
BT - Asia Communications and Photonics Conference and Exhibition, ACP 2009
PB - Optical Society of America (OSA)
T2 - Asia Communications and Photonics Conference and Exhibition, ACP 2009
Y2 - 2 November 2009 through 6 November 2009
ER -