Method and apparatus for delivering the fiber laser radiation into dynamical waveguide

An apparatus for delivery of a divergent laser beam emitted with a free-space laser fiber facet into a waveguide with a fluctuating position of input, the apparatus comprising:

• a fiber positioner comprising a wide frequency bandwidth of first X-Y displacements of the fiber facet in a first plane, wherein the first X-Y displacements comprise a first motion;
• a micro-lens sampling and transforming the laser beam into a collimated beam, wherein the micro-lens comprises a focus length off, wherein the micro-lens is located in a third plane perpendicular to a propagation direction along a Z axis, wherein the third plane is located in between the first plane and a second plane approximately at a distance f from the fiber facet, wherein the micro-lens comprises an optical axis approximately coinciding with an axis of the laser beam, wherein the micro-lens is configured to be moved with a wide frequency bandwidth of second X-Y displacements in the third plane, and of a Z—displacement along the Z axis, wherein the second X-Y displacements comprise a second motion, and wherein a displacement along the Z axis comprises a third motion;
• a plurality of bending actuators to create the first, second, and third motions;
• an optical waveguide approximately along the Z axis;
• a plurality of optical elements to intercept a fraction of intensity of a delivered laser beam into the waveguide or the fraction of intensity escaped from the waveguide;
• an opto-electronic mechanism to convert the intensity to an electronic signal, proportional to a power of the delivered beam focused into the optical waveguide or escaped from the waveguide;
• and
• a feedback processor to provide the electronic signal to the plurality of bending actuators to maximize a focusing of a power of the laser beam into the optical waveguide or to minimize a power of an escaped beam fraction leaving the optical waveguide.