1 November 2010 Nonlinear gain behavior in injectorless quantum cascade lasers
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Abstract
The gain spectra of a continuous wave operating injectorless quantum cascade lasers are presented. These are extracted by the Hakki-Paoli method from electroluminescence measurements. The device operates around 7.4 µm and has threshold current densities in pulsed and continuous wave operation at room temperature that measure 1.1 and 1.76 kA/cm2, respectively. The differential gain coefficients around 100 cm/kA at liquid nitrogen temperature and 44 cm/kA around room temperature are determined. The gain measurement values are compared with the 1/L threshold behavior versus temperature, indicating a nonlinear gain current dependence of injectorless devices.
© (2010) Society of Photo-Optical Instrumentation Engineers (SPIE)
Simeon Katz, Augustinas Vizbaras, Gerhard Boehm, Markus-Christian Amann, "Nonlinear gain behavior in injectorless quantum cascade lasers," Optical Engineering 49(11), 111107 (1 November 2010). https://doi.org/10.1117/1.3498765 . Submission:
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