Direct modulated modified vertical cavity surface emitting lasers

Abstract

A laser system having separately electrically operable cavities for emitting modulated narrow linewidth light with first, second and third mirror structures separated by a first active region between the first and the second and by a second active region between the second and the third. The second mirror structure has twenty of more periods of mirror pairs.

1 . A laser system having separately electrically operable cavities for emitting modulated narrow linewidth light, said system comprising:
 a compound semiconductor material substrate,   at least two first mirror pairs of semiconductor material layers in a first mirror structure on said substrate of a first conductivity type,   a first active region on said first mirror structure with plural quantum well structures,   at least twenty second mirror pairs of semiconductor material layers in a second mirror structure on said first active region of a second conductivity type,   a second active region on said second mirror structure with plural quantum well structures,   at least two third mirror pairs of semiconductor material layers in a third mirror structure on said second active region of said first conductivity type,   an intermediate electrical interconnection at said second mirror structure, and   a pair of electrical interconnections separated by said substrate, said first mirror structure, said first active region, said second mirror structure, said second active region, and said third mirror structure.   
     
     
         2 . The system of  claim 1  wherein said first and second active regions are p-n semiconductor junctions further comprising a biasing arrangement forward biasing each and a modulating voltage source electrically connected between said intermediate electrical interconnection and a selected one of said pair of electrical interconnections. 
     
     
         3 . The system of  claim 2  wherein said modulating voltage source is a first further comprising a second modulating voltage source electrically connected between said intermediate electrical interconnection and that remaining one of said pair of electrical interconnections. 
     
     
         4 . The system of  claim 1  further comprising a selected one of said intermediate electrical interconnection and said pair of electrical interconnections also being connected to a bonding pad supported on an electrical insulator with said electrical insulator also supported by said substrate.