| 摘要 |
The invention relates to a device for generating a laser beam (8) having a predetermined frequency. The inventive device comprises a first non-linear crystal (10) that is adapted to at least partially convert a laser beam (7) having a first frequency into a laser beam (20) having a second frequency, said second frequency being an integer multiple of the first frequency. A second non-linear crystal (11) is adapted to at least partially convert the laser beam (20) having the second frequency into the laser beam (8) having a predetermined frequency, the predetermined frequency being an integer multiple of the second frequency. The device is further provided with a resonator that is adapted to store the laser beam (20) having the second frequency. The second linear crystal (11) is located in the resonator and the resonator is tuned to the second frequency in a resonant manner.
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