P. Varangis, H. Li, G.T. Liu, T. Newell, A. Stintz, B. Fuchs, K. Malloy, L. Lester
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Abstract
We report on the 183 nm tuning range of an anti-reflection coated quantum dot (QD) laser using a diffraction grating in an external-cavity configuration. Over this range the laser threshold current density varied between 0.25 kA/cm/sup 2/ and 2.22 kA/cm/sup 2/ with an average value of 0.84 kA/cm/sup 2/. The laser active region is composed of a single InAs quantum dot layer confined in the middle of a 10-nm thick InGaAs quantum well and sandwiched by GaAs waveguide layers.
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