Title :
High-efficiency dual-beam vertical cavity surface emitting lasers for inteferometric applications
Author :
Justice, J.P. ; O´Callaghan, James ; Corbett, Brandon
Author_Institution :
Photonic Sources Group, Tyndall Nat. Inst., Cork
Abstract :
Reported are the characteristics of 850 nm vertical cavity surface emitting lasers (VCSELs) with integrated linear diffractive gratings emitting a dual-beam output with negligible increase in threshold and excellent zero-order cancellation. Power emitted into the first orders is greater than 80%. The use of a dual-beam VCSEL for measurement of surface topography using interferometry is demonstrated
Keywords :
diffraction gratings; light interferometry; measurement by laser beam; quantum well lasers; surface emitting lasers; surface topography measurement; 850 nm; dual-beam VCSEL; dual-beam vertical cavity surface emitting lasers; high-efficiency vertical cavity surface emitting lasers; inteferometric applications; integrated linear diffractive gratings; surface topography measurement; zero-order cancellation;
Journal_Title :
Electronics Letters
