Nonlinear polarization coefficients of proustite and tellurium

The effective nonlinear polarization coefficient d₃₁sinθ_m+d₂₂ cosθ_m of proustite was measured for an incident beam propagating in the positive crystallographic quadrant. The nonlinear polarization coefficient d₁₁ of tellurium was determined making allowance for the spectral width of the incident beam. This beam was generated by a Q-switched CO₂ laser operating in the single-mode regime.