Characterization of light-control-light system using graphene oxide coated optical waveguide
An optical waveguide was coated with graphene oxide (GO) using the drop-casting technique to increase the interaction between the waveguide's evanescent field and the GO layer. Subsequently, a 1550 nm tunable laser source and 980 nm pump laser is used to study the potential of the GO-film to co...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Published: |
IOP Publishing
2018
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/22668/ https://doi.org/10.1088/1555-6611/aabd25 |
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| Summary: | An optical waveguide was coated with graphene oxide (GO) using the drop-casting technique to increase the interaction between the waveguide's evanescent field and the GO layer. Subsequently, a 1550 nm tunable laser source and 980 nm pump laser is used to study the potential of the GO-film to control the flow of light through the waveguide by altering the state of the waveguide between transparent (ON) and opaque (OFF). The GO layer has a thickness of 0.40 μm and allows a 1550 nm signal with a peak power of -7.0 dBm and average output power of 0 dBm to pass through at a maximum pump power of 60 mW. The waveguide has a responsivity of ∼0.1 dB mW-1, with the time to switch between the ON and OFF states being about 3 ms. |
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