Method and apparatus for combining light sources in a pump laser array

摘要

An apparatus for providing pump light of a first wavelength λ1 to a laser that emits a second wavelength λ2 has first and second lasers of the wavelength λ1 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 wavelength λ1, a filter apparatus has a first filter on a first surface at an oblique angle to the first and second axes and that transmits λ1 and reflects λ2. A second filter on a second surface parallel to the first surface, reflects λ1 and transmits λ2. A third filter formed on the first surface coplanar with the first filter reflects λ1 and transmits λ2. The filter apparatus re-aligns the first and second axes along a second plane P2, orthogonal to P1 and parallel to the first direction.

主权项

1. An apparatus for providing a pump light of a first wavelength λ1 to a laser that emits a second wavelength λ2, comprising:
a first laser of the first wavelength λ1 that is energizable to direct light along a first axis in a first direction; a second laser of the first wavelength λ1 that is energizable to direct light along a second axis parallel to the first axis, wherein the first and second axes define a first plane P1; and a filter apparatus that is disposed to form a composite light beam of the first wavelength λ1, the filter apparatus formed on a transparent body that is disposed in the path of the directed light and having: (i) a first filter that is formed on a first surface of the filter apparatus that is disposed at an oblique angle to the first and second axes and that is transmissive to λ1 and reflects λ2; (ii) a second filter that is formed on a second surface of the filter apparatus that is parallel to the first surface, wherein the second filter reflects λ1 and transmits λ2; (iii) a third filter that is formed on the first surface of the filter apparatus, coplanar with the first filter, and wherein the third filter reflects λ1 and transmits λ2; wherein the filter apparatus re-aligns the first and second axes along a second plane P2 that is orthogonal to P1 and parallel to the first direction.