Multilayer graphene improved interface thermal property for all-optical controlled fiber interferometer
| Autor: | Qiongqiong Gu, Guoliang Deng, Hao Zhou, Xu-Dong Chen, Yukuan Ma, Sikun Zhou, Huomu Yang, Hua Zhang, Jianchang Tan |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Extinction ratio business.industry Graphene Response time Substrate (electronics) Laser Mach–Zehnder interferometer 01 natural sciences law.invention 010309 optics Interferometry law 0103 physical sciences Optoelectronics Fiber 010306 general physics business Instrumentation |
| Zdroj: | Laser Physics Letters. 17:065104 |
| ISSN: | 1612-202X 1612-2011 |
| DOI: | 10.1088/1612-202x/ab89ae |
| Popis: | As the oxide-induced disruption from silicon dioxide substrate would greatly decrease the thermal property of graphene, strategies to optimize the thermo-optical response through controlling laser spot size, layer number and covering length of graphene layer are experimentally studied and discussed. An all-optical controlled fiber Mach–Zehnder interferometer with multilayer and monolayer graphene achieved by thermo-optical effects is subsequently proposed to prove the improvements. Graphene layers with 6 mm length were transferred to the middle taper and heated by an external laser. The maximum switching extinction ratio reached 16.2 dB. The response time and modulation efficiency were approximately 620 μs and 0.22 dB mW−1, respectively. This work suggests an effective way to improve the thermal property of graphene-fiber hybrid structure for all-optical control in fiber based integrated system. Moreover, the cost and complexity of device manufacturing are greatly reduced. |
| Databáze: | OpenAIRE |
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