Zero transmission narrow band laser mirror using a waveguide grating under normal incidence
Résumé
A resonant grating mirror comprizing a multilayer submirror and a grating waveguide submirror exhibiting constructive mutual reflection is shown experimentally to provide zero transmission at resonance. Its reflection line width of less than 2 nm, its polarization selectivity and low overall loss make the device useable as a longitudinal mode filter in a disk laser in the 1000-1100 nm wavelength range