Faculté des sciences

Continuous wave operation of a 9.3 µm quantum cascade laser on a Peltier cooler

Hofstetter, Daniel ; Beck, Mattias ; Aellen, Thierry ; Faist, Jérôme ; Oesterle, Ursula ; Ilegems, Marc ; Gini Emilio ; Melchior, Hans

In: Applied Physics Letters, 2001, vol. 78, p. 1964-1966

High average power quantum cascade lasers at 9.3 µm using InP top cladding layers and both junction up and junction down mounting are presented. A 3 mm long, junction up mounted device emitted 54 mW average power at 30 °C and 11.5% duty cycle with a threshold current density of 3.72 kA/cm2. A similar, but only 1.5 mm long device with high reflection coating on both facets was... More

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    Summary
    High average power quantum cascade lasers at 9.3 µm using InP top cladding layers and both junction up and junction down mounting are presented. A 3 mm long, junction up mounted device emitted 54 mW average power at 30 °C and 11.5% duty cycle with a threshold current density of 3.72 kA/cm2. A similar, but only 1.5 mm long device with high reflection coating on both facets was mounted junction down and tested at even higher duty cycles. At –27 °C, we achieved continuous wave operation with a threshold current density of 3.3 kA/cm2.