| 摘要 |
A solid state one-piece ring laser having a plurality of surfaces for converting broad band light to a ring laser beam. At least one surface is refractive and is arranged at a Brewster's angle to the ring laser beam to linearly polarize the ring laser beam. Some of the surfaces may be reflective and are arranged at critical angles to the ring laser beam. With this arrangement, none of the surfaces needs to be coated with a dielectric which deteriorates with age and environment. In a preferred arrangement, as many of the surfaces as possible are refractive to provide a more coherent laser beam.
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