An ytterbium-fiber laser based on an active fiber with an increased core diameter and a multimode grating is created and studied. It is demonstrated that the effective reflection of the Bragg grating amounts to 96%. The laser line width is about 3 nm, which indicates the propagation of a superposition of modes in the multimode fiber. The repetitively pulsed regime of lasing, which can be related to the mode beating, is demonstrated.
The preview is over
If you wish to continue, please create your membership or