Method and Apparatus for Stabilizing a Laser Beam

The invention relates to a method for stabilizing a laser beam, in particular for stabilizing the profile intensity and/or the pendulum motion, in which an initial laser beam (1) is split into two partial beams (2, 3), wherein the two partial beams (2, 3) are rotated relative to one another by 180 degrees about the propagation direction and both partial beams (2, 3) are once again superposed to form a whole beam (4). The invention further relates to an apparatus for stabilizing a laser beam, in particular for stabilizing the profile intensity and/or the pendulum motion, with an unpolarized beam splitter (ST) which can be used to split an initial laser beam (1) into two partial beams (2, 3), with three deflection elements (SP2, SP3, SP4) by means of which the partial beam (3) deflected from the beam splitter (ST) can be deflected three times such that first, the propagation direction is reversed by way of double deflection (SP2, SP3) and then the partial beam (3) obtains the same propagation direction as the other partial beam (2) with a parallel offset by way of the third deflection (SP4), with a polarizing beam splitter (PW) which reflects one of the partial beams (2) and allows the other one (3) to pass and with a deflection element (SP1) and a polarization-rotating element (HWP); in the beam path of one of the two partial beams (2, 3) for superposing both partial beams (2, 3) with crossed polarization in the polarizing beam splitter (PW) to form a new whole beam (4).

Attached files:


Patents:
WO 2,009,000,456

Inventor(s): TOENSING KATJA [DE]; SISCHKA ANDY [DE]; ANSELMETTI DARIO [DE]

Type of Offer: Sale



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