Semiconductor laser

   
   

The present invention provides a semiconductor laser including a plurality of light emission portions provided on the same substrate, each of which is adapted to emit laser beams with a multi-mode. A part of the plurality of light emission portions constitute a main light emission group, and the rest of the plurality of light emission portions constitute a sub-light emission group. A main electrode for supplying a current to the main light emission group and a sub-electrode for supplying a current to the sub-light emission group are separately provided. With this configuration, it is possible to keep the entire quality of laser beams of the semiconductor laser constant.

 
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