Mode switching in a thin-film waveguide with boundary modulation of the refractive index

Abstract

The design of a variable reflectivity mirror (VRM) is reported, according to the requirements imposed on the output coupler of an U-type resonator for an industrial, cw, transverse flow CO, laser.?be reported method consists 01 building a variable thickness layer of BaF, on GaAs substrate material using RF magnetron sputtering coating. The obtained VRM final structure is AIR (ZnS)/GaAs/(BaF,, ZnSe) AIR exhibiting a maximum reflectivity of the central zone. at 10.6 pm, between 669; and 69%.The component worked, mounted on the laser resonator, for more than Mx) h allowing a single mode beam structure at power levels between 800 W and I kW cw.

Organic‐on‐inorganic guided wave modulator

“…The upper limit on the active layer thickness is constrained by the voltage necessary to pole the device and by available deposition techniques, which also determine the minimum thickness possible. C22 layers of 2 pm have been demonstrated [4]. This is in excess of the thickness needed here (see Figure 3).…”