Patent ID: 6798815
Filing Date: 2004-09-28
Classification: H01S

Abstract:
A semiconductor laser diode with an active region including a ridge waveguide having front and back facetscomprisingextending between said facets: said ridge waveguide having essentially constant thickness and a center segment with a substantially constant first cross section, having a length of 40-70% of the diode length, two tapered segments extending and widening from the center segment towards said facets in opposite direction, and two end segments between said tapered segments and said facets, each said end segment having a substantially constant cross section larger than said first cross section, said two tapered segments being of different lengths, a first one of said tapered segments having a length of 30-60% of the diode length, and a second one of said tapered segments having a length of up to 10% of the diode length.