Semiconductor laser apparatus, laser coupler, data reproduction apparatus, data recording apparatus and production method of semiconductor laser apparatus

Abstract

There is provided a semiconductor laser apparatus capable of individually optimizing oscillations at a plurality of light emitting units fabricated on the single substrate in accordance with usages of each emitted laser lights. A plurality of cavities (laser diodes A and B), which correspond to the plurality of light emitting units, are fabricated on single substrate. And cavity lengths of the cavities are fabricated to different from one another.

1 - 13 . (canceled)  
   
   
       14 . A data recording apparatus having a semiconductor laser apparatus, wherein: 
 said semiconductor laser apparatus comprises a plurality of cavities corresponding to a plurality of light emitting units disposed on a substrate, and    at least one of said plurality of cavities has a cavity length different from another of said plurality of cavities,    wherein said plurality of cavities is constructed to have cavity lengths all less than a length of said substrate.