Additive-pulse modelocking in fiber lasers

Abstract

A self-starting additive-pulse modelocked (APM) all-fiber ring cavity laser operating in the negative group velocity regime is analyzed. The advantages of using a ring cavity with an isolator are discussed. The "figure eight" and the Sagnac loop reflector fiber laser are investigated in a novel way, and one form of their operation is related to the master equation of APM. We point out that the ring laser has an advantage with respect to self-starting.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>