title: Square nanosecond mode-locked Er-fiber laser synchronized to a picosecond Yb-fiber laser.
abstract: A mode-locked Er-doped fiber laser was triggered to synchronize with a separate ultrashort picosecond Yb-doped fiber laser by cross phase modulation. Square nanosecond pulses were generated in the long-cavity Er-fiber laser by the peak intensity clamp effect while the synchronization maintained. At the maximum pump power of 450 mW, a synchronous laser pulse duration of 5.5 ns has been achieved. This synchronous nanosecond and picosecond system has shown a large length mismatch tolerance of 2.6 mm and can work stably for days.
authors.affiliation: State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Li
authors.forename: Xiaorong
authors.initials: X
authors.lastname: Gu
authors.forename: Ming
authors.initials: M
authors.lastname: Yan
authors.forename: E
authors.initials: E
authors.lastname: Wu
authors.forename: Heping
authors.initials: H
authors.lastname: Zeng