Semiconductor laser and optical transmission device

Abstract

The utility model provides a semiconductor laser and an optical transmission device, the semiconductor laser comprises a laser housing, a cavity of the laser housing is internally provided with a laser diode and a cylindrical lens coaxially arranged with the laser diode, the cylindrical lens comprises a first aspheric surface and a second aspheric surface, the first aspheric surface is used for collimating first light rays emitted by the laser diode in the fast axis direction, and the second aspheric surface is used for collimating second light rays emitted by the laser diode in the slow axis direction; according to the semiconductor laser provided by the utility model, the first light and / or the second light emitted by the laser diode can be changed into the collimated light by only using one cylindrical lens, so that the number of lenses arranged in the laser shell is reduced, and the optical energy loss in the semiconductor laser is reduced; and meanwhile, the size of the semiconductor laser is effectively reduced.

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