Simultaneous fundamental and subharmonic/ harmonic frequency signals generation from a dual-cavity fiber laser based on regenerative mode-locking and active mode-locking

• Published in: Optics communications Vol. 394; pp. 14 - 17
• Main Authors: Zi, Yuejiao, Jiang, Yang, Tian, Jing, Bai, Guangfu, Xia, Yi, He, Yutong, Zhang, Xiaoyu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2017
• Subjects: Harmonic generation; Mode-locked laser; Regenerative mode-locking; Semiconductor optical amplifier; Subharmonic generation; Super-mode suppression; Harmonic generation; Regenerative mode-locking; Mode-locked laser; Semiconductor optical amplifier; Subharmonic generation; Super-mode suppression
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2017.03.001

This paper presents a dual-cavity mode-locked laser, which is able to simultaneously output two optical pulses with different wavelengths and frequency. In this dual-cavity configuration, one cavity works as a regenerative mode-locked laser and outputs signal with a fundamental repetition frequency, the other one acts as an active mode-locked laser and generates signal with subharmonic or harmonic frequency by fine tuning the cavity length. In experimental demonstration, 5GHz signal from regenerative mode-locked cavity and 2.5/ 5/ 10/ 15/ 20GHz signal from active mode-locked cavity are simultaneously obtained. Additionally, signals in active mode-locked cavity get further super-mode suppression. •A fiber laser using regenerative mode-locking and active mode-locking is proposed.•Fundamental and subharmonic/ harmonic pulse signals could be output simultaneously.•Subharmonic/ harmonic signals are obtained by tuning cavity length.•Two signals could have different operation wavelengths and repetition frequency.•Signals in active mode-locked cavity get further super-mode suppression.