Abstract

We measured active zone temperature rise of an operational diode-pumped rubidium laser non-perturbatively with methane-based near-infrared tunable diode laser spectroscopy (TDLAS). For a $\mathrm{Rb}+$ methane diode-pumped alkali laser (DPAL), the temperature rise was obtained. Especially, the temperature differences ($\sim 10\mathrm{K}$) between lasing and un-lasing cases were well identified, which demonstrated a high sensitivity of the method. To our knowledge, this is the first demonstration of extending the methane-based TDLAS method to DPAL study.

© 2017 Optical Society of America

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