Integrated high-power laser emission device

A laser emission device integrated into a substrate, comprising:

• a primary waveguide, formed in the substrate, and extending from a primary reflector, the primary reflector being configured to reflect light in a reflection spectral band;
• a plurality of secondary waveguides, optically connected to the primary waveguide, each secondary waveguide extending between a coupling end, optically connected to the primary waveguide, and a secondary reflector, each secondary reflector being configured to reflect light in the reflection spectral band;
• wherein
• each secondary waveguide is optically coupled to a gain medium connected to a laser-pumping system, the gain medium being conducive to laser emission under the effect of pumping exerted by the laser-pumping system, the gain medium being placed between the coupling end and the secondary reflector of the secondary waveguide so that the device forms as many Fabry-Pérot cavities as secondary waveguides, each Fabry-Pérot cavity being configured to allow multiple reflections of light at a given resonant wavelength, in the reflection spectral band, between the primary reflector and each secondary reflector;
• the device comprises an extractor, for extracting light from the device, at the resonant wavelength, said resonant wavelength forming an emission wavelength of the device;
• the secondary waveguides define optical path lengths that are equal to one another.