With the use of spatial light modulators it became possible to implement in experiments the method of controlling the space-time intensity distribution of femtosecond laser pulses stretched to picosecond duration. Cylindrical and quasi-ellipsoidal intensity distributions were obtained and characterized by means of a 2D spectrograph and a cross-correlator.

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Experimental results of measurements for Russian magneto-optical glasses MOG101, MOG105, MOG04, and MOG10 are presented, including the coefficient of electronic nonlinearity, energy of thermal defocusing, and power resistance. For comparison, the same parameters are shown for the optical glass K8 (an analog of the well-known BK7 glass), the fused silica QU-1, and the laser phosphate glass GLS-22P. The obtained data allow consumers to choose the proper magneto-optical materials for the device operation mode.

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We describe spatial filters used in a Nd:glass laser with an output pulse energy up to 300 J and a pulse duration of 1 ns. This laser is designed for pumping of a chirped-pulse optical parametric amplifier. We present data required to choose the shape and diameter of a spatial filter lens, taking into account aberrations caused by spherical surfaces. Calculation of the optimal pinhole diameter is presented. Design features of the spatial filters and the procedure of their alignment are discussed in detail.