Room temperature interband cascade lasers

✍ Scribed by M. Kim; C.L. Canedy; C.S. Kim; W.W. Bewley; J.R. Lindle; J. Abell; I. Vurgaftman; J.R. Meyer

• Publisher: Elsevier
• Year: 2010
• Tongue: English
• Weight: 292 KB
• Volume: 3
• Category: Article
• ISSN: 1875-3892
• DOI: 10.1016/j.phpro.2010.01.162

✦ Synopsis

An analysis of the threshold current densities and differential slope efficiencies in interband cascade lasers with type-II active regions revealed lower Auger recombination rates than anticipated theoretically or using the data from prior experiments. Furthermore, a new design of the waveguide yielded room-temperature internal losses as low as 6 cm -1 . The combination of these advances with improvements to the processing of narrow ridges has led operation up to 335 K in continuous-wave mode for devices emitting at 3.3-3.7 m. An 8.7-m-wide ridge without facet coatings produced up to 23 mW of cw power at 300 K, and displayed a maximum wall-plug efficiency of 2.0%.