Generation of radially polarized beams with an image-rotating resonator.
We show how a passive image-rotating optical resonator can be used to convert a linearly polarised, lowest-order Gaussian beam into a radially polarized beam. The image and polarization rotation of the cavity removes the frequency degeneracy of the modes, making it possible to select the radially polarized mode by cavity tuning. With the addition of gain, the same cavity should operate as a radially polarized laser when injection seeded at the proper wavelength.
Armstrong
Darrell J
DJ
Sandia National Laboratories, Department 1118, Albuquerque, New Mexico 87185-1423, USA.
Phillips
Mark C
MC
Smith
Arlee V
AV