| 摘要 |
According to an aspect, the invention relates to a frequency conversion cell (10) including: a nonlinear, birefringent crystal (12), characterized by a first phase matching wavelength and having an input surface (121A) for receiving at least one incident beam, an output surface (121B) for emitting at least one frequency-converted beam, and at least two parallel surfaces (120A, 120B), different from the input and output surfaces; and means (14, 14A) for applying an external mechanical force onto at least one of said parallel surfaces (120A), referred to as "force application" surface, thus resulting in a variation in the birefringence of the nonlinear crystal. The value of the applied external mechanical force is predetermined such as to obtain the phase matching in the nonlinear crystal at a second phase matching wavelength different from the first phase matching wavelength. |
