3 years ago

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 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 µ m 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.

Publisher URL: http://iopscience.iop.org/1555-6611/28/7/076001

DOI: 10.1088/1555-6611/aabd25

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