Enhancement of the sensitivity of intracavity laser spectroscopy by the use of neodymium glass lasers

The sensitivity of intracavity spectroscopy carried out using neodymium glass lasers increased in accordance with the Bouguer law when the duration of quasi-cw lasing increased up to 12 msec. Qualitative observations were made of an increase in the sensitivity on further increase in the pulse duration to 20 msec.