Abstract

Persistent spectral hole burning has been observed in CaF2:Sm2+ and originates from photoionization of the Sm2+ ion. This represents a new class of persistent hole-burning materials. We have used hole burning to measure the nonlinear Zeeman effect of the 7F0A1g → A1u transition at 695.8 nm with a resolution of ∼100 MHz. We find a nonlinear coefficient of 0.93 Hz/G2, which is close to the value of 1.0 Hz/G2 calculated for the 7F0–7F1 interaction. This shows that the dominant contribution to the nonlinear Zeeman effect comes from the ground state.

© 1984 Optical Society of America

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