Patent ID: 7903713
Filing Date: 2011-03-08
Classification: H01S

Abstract:
1. An edge-emitting multi-beam semiconductor laser comprising juxtaposed stripe-shaped light-emitting portions the number of which is N, wherein, N≧3; each of the light-emitting portions includes the first electrode in the light-emitting portions, the number of which is N, is commonly provided to the light-emitting portions, the number of which is N; at least one separation groove that electrically separates the light-emitting portions from each other is provided between the light-emitting portions; a first recess that is partly discontinuous is provided outside a first light-emitting portion; a second recess that is partly discontinuous is provided outside an Nth light-emitting portion; the second-electrode-extending portion in the first light-emitting portion extends to a first region disposed outside the first light-emitting portion with a continuous portion of the first recess therebetween; the second-electrode-extending portion in the Nth light-emitting portion extends to a second region disposed outside the Nth light-emitting portion with a continuous portion of the second recess therebetween; and the second-electrode-extending portion in an nth light-emitting portion (wherein 2≦n≦(N−1)) extends to the first region disposed outside the first light-emitting portion with a continuous portion of one of the at least one discontinuous separation groove and a continuous portion of the first recess therebetween or extends to the second region disposed outside the Nth light-emitting portion with a continuous portion of one of the at least one discontinuous separation groove and a continuous portion of the second recess therebetween.