| (11) | EP 0 461 892 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Improved coupling structures for a phase-locked laser array |
(57) Coupling structures (40) for an index-guided laser array utilize passive transparent waveguides to improve coupling and phase-lock the array. The passive waveguides may be in the form of at least one y-coupled waveguide array (36, 38). The passive waveguides are oriented co-axially to, and are coupled to, amplification waveguides (34). |