Ridge-width dependence of midinfrared interband cascade laser characteristics

William W. Bewley; Chadwick L. Canedy; Chul Soo Kim; Mijin Kim; J. Ryan Lindle; Joshua Abell; Igor Vurgaftman; Jerry R. Meyer

doi:10.1117/1.3498772

1 November 2010 Ridge-width dependence of midinfrared interband cascade laser characteristics

William W. Bewley, Chadwick L. Canedy, Chul Soo Kim, Mijin Kim, J. Ryan Lindle, Joshua Abell, Igor Vurgaftman, Jerry R. Meyer

Author Affiliations +

Optical Engineering, Vol. 49, Issue 11, 111116 (November 2010). https://doi.org/10.1117/1.3498772

Abstract

We report an experimental study of how the light-current characteristics and lateral mode properties of interband cascade lasers depend on ridge width. Narrower ridges provide greater heat dissipation due to lateral flow, along with operation in a single lateral mode. However,sidewall imperfections increase the cw threshold current density somewhat, from J_th = 582 A/cm²at 300 K for an 11-µm-wide ridge to 713 A/cm² and 1.07 kA/cm²for 5- and 3-µm-wide ridges, respectively. The narrowest ridges similarly display a degradation of the slope efficiency. A 13-µm- wide ridge produced 45 mW per facet of cw output power and maximum wall-plug efficiency of 3.5% per facet at T = 20°C. A 5-µm-wide ridge with 3-mm cavity length and no facet coatings operated cw at = 3.5-µm to a new record temperature of 345 K for the 3 to 4-µm spectral range.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

William W. Bewley, Chadwick L. Canedy, Chul Soo Kim, Mijin Kim, J. Ryan Lindle, Joshua Abell, Igor Vurgaftman, and Jerry R. Meyer "Ridge-width dependence of midinfrared interband cascade laser characteristics," Optical Engineering 49(11), 111116 (1 November 2010). https://doi.org/10.1117/1.3498772

Published: 1 November 2010

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