A four-pass MOPA laser with tunable pulse width from sub-nanosecond to nanosecond

摘要

A four-pass MOPA laser with tunable pulse width ranging from sub-nanosecond to nanosecond is presented in which a laser signal with the initial-transmission-controlled tunable pulse width is magnified by a four-pass laser amplifier. By the use of the MOPA system, a laser pulse energy over 1 J and pulse width ranging from 545 ps to 1464 ps were obtained.