Generation of Sub-20-fs Pulses From a Graphene Mode-Locked Laser

Date
2017
Authors
Canbaz, F.
Kakenov, N.
Kocabas, C.
Demirbas, U.
Sennaroglu, A.
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Optics Express
Print ISSN
1094-4087
Electronic ISSN
Publisher
OSA - The Optical Society
Volume
25
Issue
3
Pages
2834 - 2839
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
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Abstract

We demonstrate, what is to our knowledge, the shortest pulses directly generated to date from a solid-state laser, mode locked with a graphene saturable absorber (GSA). In the experiments, a low-threshold diode-pumped Cr3+:LiSAF laser was used near 850 nm. At a pump power of 275 mW provided by two pump diodes, the Cr3+:LiSAF laser produced nearly transform-limited, 19-fs pulses with an average output power of 8.5 mW. The repetition rate was around 107 MHz, corresponding to a pulse energy and peak power of 79 pJ and 4.2 kW, respectively. Once mode locking was initiated with the GSA, stable, uninterrupted femtosecond pulse generation could be obtained. In addition, the femtosecond output of the laser could be tuned from 836 nm to 897 nm with pulse durations in the range of 80-190 fs. We further performed detailed mode locking initiation tests across the full cavity stability range of the laser to verify that pulse generation was indeed started by the GSA and not by Kerr lens mode locking. � 2017 Optical Society of America.

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Keywords
Electromagnetic pulse, Graphene, Laser accessories, Laser mode locking, Locks (fasteners), Optical pumping, Pulse repetition rate, Pumping (laser), Saturable absorbers, Solid state lasers, Ultrashort pulses, Average output power, Femtosecond pulse generation, Graphene saturable absorbers, Kerr lens mode locking, Mode-locked laser, Pulse durations, Pulse generation, Repetition rate, Mode-locked fiber lasers
Citation
Published Version (Please cite this version)