| 摘要 |
A tunable laser according to the present invention includes a plurality of Fabry-Perot semiconductor lasers comprising a plurality of semiconductor gain medium compositions disposed on a common sub-carrier with means for thermal tuning, and coupled to a sample. In a preferred embodiment, the lasers are coupled to a common multi-mode optical fiber, and an output radiation from the multi-mode fiber is tunable by switching the drive current amongst the lasers, and by thermal tuning of each laser in the array. In one preferred embodiment of this invention the plurality of Fabry-Perot semiconductor lasers are arranged around the perimeter of a cylindrical submount with a substantially circular cross-section. In another preferred embodiment a linear array of Fabry-Perot edge-emitting lasers is directly coupled to a multi-mode fiber. In still another preferred embodiment, an array of Fabry-Perot lasers is coupled to a fiber bundle.
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