title: Bidirectional passively mode-locked soliton fiber laser with a four-port circulator.
abstract: We present an all-fiber bidirectional passively mode-locked soliton laser with what we believe is a novel cavity configuration. Using a four-port circulator, we incorporate two different semiconductor saturable absorber mirrors (SESAMs) into the laser cavity, which enables bidirectional mode locking. The laser allows the generation of two independent countercirculating mode-locked pulse trains, each with an individual fundamental repetition rate that can be adjusted by varying the SESAM pigtail length. Two countercirculating pulse trains with repetition rates of 21.3 and 15.2 MHz are obtained simultaneously. By controlling the intracavity loss imposed on these two pulse trains, either one of the two pulse trains can be switched on or off. The bidirectional operation with other repetition rates is also demonstrated.
authors.affiliation: School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore. cmouyang@ntu.edu.sg
authors.forename: Chunmei
authors.initials: C
authors.lastname: Ouyang
authors.forename: Ping
authors.initials: P
authors.lastname: Shum
authors.forename: Kan
authors.initials: K
authors.lastname: Wu
authors.forename: Jia Haur
authors.initials: JH
authors.lastname: Wong
authors.forename: Huy Quoc
authors.initials: HQ
authors.lastname: Lam
authors.forename: Sheel
authors.initials: S
authors.lastname: Aditya
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007909:Lenses; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*