one of the reflectors being constituted by a diffraction grating

Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range > Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating > by controlling the mutual position or the reflecting properties of the reflectors of the cavity > one of the reflectors being constituted by a diffraction grating

Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range (semiconductors lasers H01S5/00) > Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating > by controlling the mutual position or the reflecting properties of the reflectors of the cavity (, H01S3/13 take precedence) > one of the reflectors being constituted by a diffraction grating