NOT KNOWN DETAILS ABOUT VCSEL LASER DIODE

This makes it easy to collimate the output beam with a straightforward lens, which does not have to have a extremely high numerical aperture.VCSELs for wavelengths from 650 nm to 1300 nm are typically dependant on gallium arsenide (GaAs) wafers with DBRs formed from GaAs and aluminium gallium arsenide (AlxGa(1−x)As). The GaAs–AlGaAs technique