title: 12 GHz passive harmonic mode-locking in a 1.06 μm semiconductor optical amplifier-based fiber laser with figure-eight cavity configuration.
abstract: We report the generation of passively harmonic mode-locked pulses using a 1.06 μm semiconductor optical amplifier (SOA) in a figure-eight laser configuration operated in the all-normal-dispersion regime. Different orders of harmonic mode-locking can be obtained from 30 MHz to 12.02 GHz by changing the injection current of the SOA from 80 to 660 mA together with the adjustment of polarization controllers. The highest pulse repetition rate increases almost linearly with the SOA current. As SOA current is set to 660 mA, we obtain the intracavity power of 46 mW at the highest repetition rate of 12.02 GHz, corresponding to the 1202th harmonic of the fundamental mode-locking frequency. To our best knowledge, this is the lowest intracavity power to generate the highest repetition rate with a passively mode-locked laser in the all-normal-dispersion regime.
authors.affiliation: Department of Photonics & Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu, Taiwan.
authors.forename: Hou-Ren
authors.initials: HR
authors.lastname: Chen
authors.forename: Kuei-Huei
authors.initials: KH
authors.lastname: Lin
authors.forename: Chih-Ya
authors.initials: CY
authors.lastname: Tsai
authors.forename: Hsiao-Hua
authors.initials: HH
authors.lastname: Wu
authors.forename: Chih-Hsuan
authors.initials: CH
authors.lastname: Wu
authors.forename: Chieh-Han
authors.initials: CH
authors.lastname: Chen
authors.forename: Yu-Chieh
authors.initials: YC
authors.lastname: Chi
authors.forename: Gong-Ru
authors.initials: GR
authors.lastname: Lin
authors.forename: Wen-Feng
authors.initials: WF
authors.lastname: Hsieh