METHOD AND APPARATUS FOR COMBINING LIGHT SOURCES IN A PUMP LASER ARRAY

摘要

An apparatus for providing pump light of a first wavelengthλ1 to a laser that emits a second wavelengthλ2 has first and second lasers of the wavelengthλ1 to direct light along first and second axes in a first direction. The first and second axes define a first plane P1. To form a composite light beam of wavelengthλ1, a filter apparatus has a first filter on a first surface at an oblique angle to the first and second axes and that transmitsλ1 and reflectsλ2. A second filter on a second surface parallel to the first surface, reflectsλ1 and transmitsλ2. A third filter formed on the first surface coplanar with the first filter reflectsλ1 and transmitsλ2. The filter apparatus re-aligns the first and second axes along a second plane P2, orthogonal to P1 and parallel to the first direction.