Department of Physics;
Deenbandhu Chhotu Ram University of Science and Technology (D.C.R.U.S.T);
Murthal;
Sonipat;
India;
Department of Physics;
Hindu P.G. College;
Sonipat;
India;
Laser Systems Engineering Division (L.S.E.D.);
Raja Rammanna Centre for Advanced Technology (CAT);
Indore;
India;
Direct; and; Indirect; Band; Gap; Crystals; Two; Photon; Absorption; Three; Photon; Absorption; Saturated; Absorption;