Arrangement with a an acousto-optical - optical modulator acousto-optical - optical switch having

摘要

The present invention relates to an arrangement with a an acousto-optical - optical modulator (3) and acousto-optical - optical switch (2), the number of times to increase the efficiency of a supplied laser beam (4) is run through. A small residual amount of impinges as a undiffracted zero-order laser beam (9) to a first mirror (10). This first mirror (10) is arranged around a in comparison to the bragg angle (θ_B) large angle (α) with respect to the second main plane (11) of the acousto-optical - optical modulator (3) is inclined, so that the at the first mirror (10) deflected laser beam (7, 9) the acousto-optical - optical modulator (3) passes through virtually unaffected. From a further mirror (12), the laser beams (7, 9) and reflected once again to the acousto-optical - optical modulator (3) is deflected. For this purpose, the further mirror (12) is not parallel to the first mirror (10), but relative to this by the amount of the bragg angle (θ_B) arranged inclined. Accordingly, the in its first passage through the acousto-optical - optical modulator (3) undiffracted and on the two mirrors (10, 12) reflected residual portion of the laser beam (9) at a negative bragg angle (- θ_B) in the acousto-optical - optical modulator (3) a. Therefore, the orientations of all of the coupled-out laser beams (7, 15, 16) from one another, so that these can be separated in a simple manner.