Semiconductor laser array and semiconductor laser device having semiconductor laser array

摘要

One aspect of the present invention may include a semiconductor laser array, comprising: a substrate; a first laser element on the substrate, the first laser element having a first resonator; a second laser element on the substrate, the second laser element having a second resonator, the second resonator being shorter in cavity length than the first resonator; and a protrusion on the substrate, the protrusion being substantially equal in height from the substrate with one of the first laser element and the second laser element.