Sughrue, Mion, Zinn, Macpeak & Seas
Semiconductor laser element with excellent high-temperature characteristic and capable of being readily mounted on an optical circuit board
 In a semiconductor laser element which has a semiconductor block including a first end surface, a second end surface opposite to the first end surface, and a principal surface contiguous to the first and the second end surfaces, the internal end surface is defined by forming a groove from the principal surface, creating an internal end surface opposite to the second end surface and nearer to the second end surface than the first end surface is. The internal end surface serves as a front laser beam emitting surface while the second end surface serves as a rear laser beam emitting surface. Thus, an optical resonator is provided between the internal and the second end surfaces. The internal end surface is spaced apart from the second end surface by a length of 150 .mu.m, which is different from a length of the semiconductor block. 
NEC Corporation
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Hirohito
Yamada