Patent ID: 6787381
Filing Date: 2004-09-07
Classification: H01S

Abstract:
A method of producing a semiconductor laser having at least two laser diodes having different oscillation wavelengths on a substrate,said method of producing a semiconductor laser including the steps of: successively causing epitaxial growth of a first cladding layer, an active layer, and a second cladding layer for forming a first laser diode on a substrate to form a first stack; removing portions of said first stack other than said first laser diode; successively causing epitaxial growth of a first cladding layer, an active layer, and a second cladding layer for forming a second laser diode on a substrate to form a second stack; removing portions of said second stack other than said second laser diode and spatially separating said first stack and second stack; forming an electrode on a said laser diode; forming a front surface coating film having a predetermined thickness optimized with respect to a predetermined wavelength of an arithmetical average of said oscillation wavelengths on an end of a laser emission side of a said laser diode; and forming a rear surface coating film having a predetermined thickness optimized with respect to said predetermined wavelength having a higher reflectance compared with said front surface coating film on an end of a back side of said laser emission side.