Patent ID: 6212215
Filing Date: 2001-04-03
Classification: H01S

Abstract:
A MOPA laser system comprising:a laser master oscillator (MO) pumped by a first pump source and having a Nd-doped gain medium for generating a MO beam with tailored beam properties; anda power amplifier (pumped by a second pump source and having an Yb-doped gain medium for amplifying the MO beam, the MO and PA being arranged to input the MO beam into the PA to pass the MO beam through the Yb-doped gain medium;the Nd-doped gain medium and Yb-doped gain medium having a gain maximum at substantially the same wavelength, the Nd-doped gain medium having a higher gain cross section than the Yb-doped gain medium, the Yb-doped gain medium having a longer energy storage time than the Nd-doped gain medium.