Graphene actively Q-switched lasers
Author
Li, DiaoXue, Hui
Qi, Mei
Wang, Yadong
Akşimşek, Sinan
Chekurov, Nikolai
Kim, Wonjae
Li, Changfeng
Riikonen, Juha
Ye, Fangwei
Dai, Qing
Ren, Zhaoyu
Bai, Jintao
Hasan, Tawfique
Lipsanen, Harri
Sun, Zhipei
Type
Date
2017-05-05Language
en_USMetadata
Show full item recordAbstract
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 ~1.55 and 2 μm 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.
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