CW

CW

CW lasers or continuous wave lasers are designed to be on continuously and not pulsed.  Many DPSS lasers are designed for pulsed applications with higher peak energy.

For reference:

A millisecond (ms or msec) is one thousandth of a second.

A nanosecond (ns or nsec) is one billionth (10 -9) of a second.

A picosecond (ps) is one trillionth (10 -12 ) of a second or one millionth of a microsecond.

A femtosecond (fs) is one quadrillionth (10 -15 ) of a second

An attosecond is one quintillionth (10 -18 ) of a second.