A robust All fiber Q Switched 1micron Yb3 Fiber laser

An all fiber active Q Switched Yb3 doped fiber laser at 1B5m is presented The laser is composed of a ring resonator with an embedded all fiber Q switch element based on a null coupler with an attached Piezoelectric Transducer PZT The PZT is used as an acoustic actuator for inducing longitudinal acoustic disturbance along the null coupler and causing light coupling between the null coupler s ports A stable operation is achieved with an overall average output power of up to 275mWatt at a various pulse rep