Patent ID: 6870871
Filing Date: 2005-03-22
Classification: H01S

Abstract:
1. A semiconductor laser device comprising: an InP substrate; a resonator cavity disposed on said InP substrate, said resonator cavity having a first facet, a second facet, a cavity length L of at least 1000 microns (μm) between said first and second facets; a strained multi-quantum well structure disposed in said cavity; a low-reflectivity film on the first facet; and a high-reflectivity film on the second facet; and wherein the second facet has a facet reflectivity of about 90% or more, and wherein the facet reflectivity of the first facet has a value between approximately  and approximately  for cavity lengths L between approximately 1000 μm and approximately 1300 μm, a value between approximately  and approximately  for cavity lengths L between approximately 1300 μm and approximately 1500 μm, and a value between approximately  and approximately  for cavity lengths L between approximately 1500 μm and approximately 2000 μm.