All-fiber periodically Q-switched laser

A short linear cavity erbium fiber laser is adapted to become a Q-switched laser by using a new and simple loss switching technique. The technique utilizes the inherent flexibility of optical fiber to rapidly drive the fiber end in and out of alignment with a cavity mirror, creating the conditions necessary for Q-switching. We investigate the effectiveness of different Q-switch configurations and analyze the Q-switch opening time of each configuration. [c] 2010 Optical Society of America OCIS codes: 060.2410, 060.3510, 140.3500, 140.3510, 140.3540.