The invention provides a component for beam de-coherence. A component optical medium material comprises glass ceramics, each tiny crystal particle size is 0.1-1000nm, and the tiny crystal particles are randomly distributed; since the crystal in the glass ceramics can change the phase of the beam, the glass ceramics can play the effect of randomly changing the phase of the beam, thereby realizing the effect of eliminating the beam coherence; the glass ceramics crystal is small in size, the beam transmission efficiency cannot be influenced; and by only adding the component of the invention in the beam transmission, the beam de-coherence can be realized, the structure is simple and the use is convenient.