HELLO PELIN
In many, although not all, cases the output of a laser is polarized. This normally means a linear polarization state, where the electric field oscillates in a certain (stable) direction perpendicular to the propagation direction of the laser beam. There are cases (occurring e.g. with fiber lasers) where a different, e.g. elliptical but also more or less stable polarization state is generated, which can be transformed into a linearly polarized beam..This is not possible, however, for broadband emission with wavelength-dependent polarization state.
please refer to following link for further information.
https://www.rp-photonics.com/polarization_of_laser_emission.html
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