Graphene actively Q-switched lasers

Diao Li, Hui Xue, Mei Qi, Yadong Wang, Sinan Aksimsek, Nikolai Chekurov, Wonjae Kim, Changfeng Li, Juha Riikonen, Fangwei Ye, Qing Dai, Zhaoyu Ren, Jintao Bai, Tawfique Hasan, Harri Lipsanen, Zhipei Sun*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

23 Citations (Scopus)

Abstract

Graphene electro-optic modulators (GEOMs) are emerging as a viable alternative to conventional material-based modulators mainly due to their broadband and ultrafast performance. These GEOMs with combined advantages of small footprint and low energy consumption can potentially enable various high-performance applications that are not possible using conventional approaches. Here, we report the first actively Q-switched lasers with a GEOM. In contrast to the previously reported lasers that are passively modulated by two-dimensional layered material-based saturable absorbers, our actively modulated laser concept represents significant advantages, such as electrically tunable output parameters (e.g. output repetition rate, pulse duration and pulse energy) and electro-optical synchronization. Using a single GEOM, we generate broadband Q-switched pulses at similar to 1.55 and 2 mu m with output energies of up to 123 nJ. This indicates the broadband pulse generation capability of the graphene-based active devices, superior to widely used bulk material-based active modulation approaches. Our results demonstrate a simple and viable design towards broadband, high-repetition-rate, electrically modulated ultrafast lasers for various applications, such as telecommunications and spectroscopy.

Original languageEnglish
Article number025095
Number of pages9
Journal2 D Materials
Volume4
Issue number2
DOIs
Publication statusPublished - Jun 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • graphene
  • electro-optic modulators
  • fiber lasers
  • active Q-switching
  • FEMTOSECOND PULSE GENERATION
  • ATOMIC-LAYER GRAPHENE
  • WAVE-GUIDE LASER
  • SATURABLE ABSORBER
  • ELECTROOPTIC MODULATOR
  • OPTICAL MODULATORS
  • BLACK PHOSPHORUS
  • HYBRID SYSTEMS
  • FIBER LASERS
  • ULTRAFAST

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