Polarization-controlled VCSEL characterization
Article by Frank Münchow and Karthik Iyer
Most VCSELs are not designed to emit in a single polarization state and often there is no control over the polarization angle. A novel one-shot method measures the spatial polarization of each single emitter and allows to correct the polarization dependency of the setup. This process minimizes the error budget of the VCSEL testing system and measures accurate values for laser eye safety calculations.