High-Power Diode Lasers under External Optical Feedback - Photonics West 2015
In our paper, we will discuss the impact of optical feedback to filamentation amplitudes of single emitters with different reflectivity of the front facet coatings at several wavelengths in the spectral range between 780nm and 980nm. In addition to reversible modifications of external feedback to the device properties, we will consider irreversible impacts leading to gradual and sudden degradation including catastrophic optical damage (COD). Corresponding to the energy gap of GaAs, 870nm make the distinction in the absorption mechanisms of these diodes. We will compare the behavior of GaAs-based laser diodes with wavelengths below and above 870nm and discuss the differences.