Module of fiber coupled diode laser based on 808 nm single emitters combination

Because of the good beam quality and heat dissipation of single emitter diode laser, it is more suitable to be used in the source of electro-optic countermeasure. Aim at the response curve of charge-coupled device (CCD) spectrum, 808 nm single emitter is used as unit source and 24 single emitters are divided into four groups. In order to increase the output power intensity, space combination and polarization combination are used in the experiment. Combined beam is focused in an optical fiber through the focused lens group designed by ourself. All the single emitters are connected in series. When the drive current is 8.5 A, 162 W output power is obtained from a 300 μm fiber core with a numerical aperture of 0.22 at 808 nm and coupling efficiency of 84%.