Patent ID: 11894658
Assignee: VIXAR, INC.
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 10:
11. A VCSEL device comprising:
a VCSEL chip, the VCSEL chip having a center point and a top surface, and
a photodiode, the photodiode having a center point, wherein the VCSEL chip and the photodiode arranged on a submount such that the center point of the VCSEL chip is separated from the center point of the photodiode by a first distance; and
wherein the VCSEL chip and photodiode are housed in a package, the package having:
a window configured and arranged to allow light emitted from the VCSEL chip to pass through the window, the window having a first lateral end and a second lateral end;
a spacer arranged between the submount and the window; and
a pseudo-random, non-periodic diffuser provided extending from the first lateral end to the second lateral end, the non-periodic diffuser being arranged at a height of a second distance above the top surface of the VCSEL chip, wherein the second distance is less than the first distance;

wherein light emitted by the VCSEL chip travels in three manners:
a portion of the light propagates is transmitted through the diffuser and through the window;
a first minority portion of the light is repeatedly scattered and reflected within the diffuser parallel to a plane of the window; and
a second minority portion of the light is scattered by the diffuser back into the package and to the photodiode.