Patent ID: 6546034
Filing Date: 2003-04-08
Classification: H01S

Abstract:
A semiconductor laser device comprising:a semiconductor substrate; a first cladding region on a side of said semiconductor substrate; an active layer region formed as a laminate structure including a quantum-well; a second cladding region disposed over a same side of said semiconductor substrate as that on which said first cladding region is on and with said active layer region being intermediate that between said semiconductor substrate and said second cladding region; a first semiconductor region on either side of said active layer region in parallel with a traveling direction of light in the active layer region, said first semiconductor region having an electric resistance higher than that of said active layer region and a refractive index higher than that of said semiconductor substrate, wherein said first semiconductor region is formed by implanting Fe ions into said active layer region laminate structure; an insulative or semi-insulative second semiconductor region formed between said first semiconductor region and part of said second cladding region; and a first electrode and a second electrode for injecting a current into said active layer region.