Patent ID: 8247252
Filing Date: 2012-08-21
Classification: H01S

Abstract:
1. A method of manufacturing a Vertical Cavity Surface Emitting Laser (VCSEL) array to a desired power density, comprising the steps of: establishing, using a first VCSEL array including VCSEL elements, a relationship between an effective lateral size of a laser active region of the VCSEL elements, a pitch between center points of nearest neighbors of the VCSEL elements, and a power output by the first VCSEL array, determining data corresponding to a wall-plug efficiency of the first VCSEL array for a plurality of different pitches and effective lateral sizes, determining positions of VCSEL elements in a second VCSEL array on the basis of the relationship and the data, wherein a pitch between center points of nearest neighbors of the VCSEL elements in the second VCSEL array is equal to or less than 80 μm, and a first pitch between center points of a first VCSEL element in the second VCSEL array and a nearest neighbor thereto and a second pitch between center points of a second VCSEL element in the second VCSEL array and a nearest neighbor thereto are different, and manufacturing the second VCSEL array with the VCSEL elements substantially at the determined positions, wherein each of the VCSEL elements of the first VCSEL array and the second VCSEL array includes an effective laser active region with a defined center point and with an effective lateral size equal to or less than 30 μm.