H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/10 (2006.01) H01S 5/40 (2006.01) H01S 5/00 (2006.01)
Patent
CA 2285134
Described is a method and a device for the coherent addition of the emissions of semiconductor lasers, in particular for use in telecommunications. The basic idea on which the present invention is based is to couple the single emitters in such a way that each emitter senses some of the emission of all the others. Instead of allowing all the emitters to radiate independently, they are arranged in a common resonator (3). Using an optimization method, for example the method of simulated annealings, the shape of the resonator mirror is optimized until such time as it satisfies a pre-described set of mathematically formulated requirements in the sense of a set criterion, and does so in an optimal manner. Essentially, the method is based on the following factors: the single emitters in the form of single diodes, a diode matrix, or diode bars (2) are set up between two or more mirrors (1). At least one of these mirrors (1) has a special non-spherical surface as an internal correction element. Alternatively, the mirrors 1 can be spherical. In this case, however, at least one non-spherical phase plate must be arranged in the path of the resonator beam. Outside the resonator (3), an additional system comprising a generator and a secondary beam shaper transforms the emitted beam into the desired amplitude/phase distribution and power density (5). The internal correction elements are constructed by a global optimization method, or the internal correction elements and the external generalize lenses are constructed together by means of a global optimization method.
Angelow Gregor
Dultz Wolfgang
Laeri Franco
Deutsche Telekom Ag
Fetherstonhaugh & Co.
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