Graphene actively Q-switched lasers

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • 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

Research units

  • Northwestern Polytechnical University Xian
  • Shanghai Jiao Tong University
  • University of Cambridge
  • Northwest University China
  • Oxford Instruments Analytical Oy
  • National Center for Nanoscience and Technology Beijing

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.

Details

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

    Research areas

  • 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

ID: 13577544