A vertical cavity surface emitting laser (VCSEL) in which a higher order
lasing mode produces a Gaussian-like single mode far field beam intensity
pattern. Such a VCSEL includes a protective surface deposition on a VCSEL
structure, and phase filter elements on the surface deposition. The
surface deposition and the phase filter elements implement an optical
phase filter that induces optical path difference such that a single mode
far field beam intensity pattern results when the VCSEL operates in a
higher order lasing mode. The VCSEL can include structures that enhance a
selected higher-order operating mode and/or that suppress unwanted
operating modes.