Patent ID: 8467428

Claim:
A vertical cavity surface emitting laser device, comprising a vertical cavity surface emitting laser ( 1 ) with a monolithically integrated photodiode ( 2 ) arranged to measure an intensity of light emitted by said laser ( 1 ), wherein said photodiode ( 2 ) is formed of a layer sequence of a first n-doped region ( 6 ), a p-doped region ( 7 ), an intrinsic region ( 8 , 14 ) and a second n-doped region ( 9 ) of a semiconductor material, said photodiode ( 2 ) and said laser ( 1 ) sharing a common electrode, which is realized as an Ohmic n-contact ( 10 ) at said first n-doped region ( 6 ), and a first layer structure including an active region being embedded between a first DBR and a second DBR, said first n-doped region, said p-doped region, said intrinsic region and said second n-doped region of said photodiode being integrated in said second DBR, wherein said first n-doped region of said photodiode is formed of a first n-doped portion of said second DBR, said p-doped region of said photodiode is formed of a second p-doped portion ( 3 b ) of said second DBR and said second n-doped region of said photodiode is formed of a third p-doped portion of said second DBR, said intrinsic region of said photodiode being arranged between said second and third portion ( 3 c ) of said second DBR.