Patent ID: 6159758
Filing Date: 2000-12-12
Classification: B82Y,H01S

Abstract:
A process for producing a batch of multiple quantum well InGaAsP lasers each having a lasing wavelength within a narrow acceptable wavelength range of a target wavelength, the lasers being formed on a quantity of substrates having carrier doping concentrations within a bulk doping concentration range, said process comprising:segregating said quantity of substrates into substrate groups based on the carrier doping concentration of each of the substrates so that substrates having substantially similar carrier doping concentrations within a segregating range smaller than the bulk range are segregated into respective common groups; andepitaxially growing, from at least one of said segregated substrate groups, InGaAsP quaternary layers in a metal-organic chemical vapor deposition (MOCVD) reactor, on said substrates in said at least one group for producing a batch of lasers having lasing wavelengths within the narrow acceptable range of the target wavelength.