| 摘要 |
A compact polarisation selection device (99, 100, 300, 350, 500, 550) for all kind of laser beam applications is proposed. The device (99, 100, 300, 350, 500, 550) comprises at least two components (60, 70), the first component (60) having a surface (80), which is at least partly making an angle of substantially thetaB,i or substantially -thetaB,i with respect to the first direction of the incident beam and the second component having a surface being complementary thereto. thetaB,i thereby is the internal Brewster angle. As the first component (60) and the second component (70) are adapted to be offset from each other such that light leaving the surface (80) of said first component (60) is at least partly coupled into the second component (70) via said complementary shaped surface (74), selection of a polarisation component of the incident light beam is obtained. In case the surfaces are at least partly cylindrical symmetrical, at least partly radial polarised light components are obtained. The polarisation selection device can be used intracavity or extracavity.
|
