CPC G02B 3/0037 (2013.01) [G02B 3/04 (2013.01); G02B 27/123 (2013.01); G02B 27/30 (2013.01)] | 28 Claims |
1. An apparatus for combining a plurality of coherent laser beams, the apparatus comprising:
at least N−1 phase setting devices configured to set a respective phase (δφn) of a respective one of the plurality of coherent laser beams; and
a beam combination device configured to combine the plurality of coherent laser beams to form at least one combined laser beam, the beam combination device including a microlens arrangement having at least two microlens arrays configured to form the at least one combined laser beam;
wherein the respective phase (δφn) of the respective one of the plurality of coherent laser beams is given by:
δφn=−(2π/λL)fE(mnλL/p)2,
wherein N denotes a number of the plurality of coherent laser beams, n denotes an index for an n-th coherent laser beam, p denotes a grid spacing of microlenses of a respective microlens array, fE denotes an effective focal length of the microlens arrangement, and λL denotes a laser wavelength, and wherein the following applies:
|