Wavelength-stabilized tilted cavity quantum dot laser

Abstract

Wavelength-stabilized operation is realized in broad area quantum dot laser diodes with cleaved facets grown in the tilted cavity laser (TCL) design for the range up to 1.3 µm. For two different designs TCL wavelength is chosen to be either in the range of quantum dot excited state transitions (1.16 µm), or in the range of quantum dot ground state transitions (1.27 µm). The shift of the lasing wavelength is 0.165 nm K−1 in a temperature range between −200 °C and 70 °C. The spectral width of the lasing emission in broad area devices is 0.6 nm and the width (FWHM) of the far field is 4° and 42° for lateral and vertical directions, respectively.