Small-signal amplification at 2.3 μm in Cr2+:ZnSe with single-mode-pumping at 1.9 μm

Abstract

A Cr2+:ZnSe crystal with quasi-continuous-wave single-mode pumping at 1.9 μm generates over 10 dB of single-pass small-signal gain at 2.3 μm. Simulations suggest 30 dB is possible. We attribute the difference to quenching and focal mismatch.