Abstract
Pulses with picosecond pulse widths are highly desired for high precision laser applications. A mode-locked pulse laser utilizing evanescent field interaction of a tapered fiber with graphene oxide (GO) is demonstrated. A homemade fabrication stage was used to fabricate the tapered fiber using systematic flame brushing and a GO solution was used to coat the microfiber using optical deposition technique. Pulse trains with a pulse width of 3.46ps, a 3dB optical bandwidth of 11.82nm and a repetition rate of 920kHz were obtained. The system has substantial potential for many crucial medical, communication, bio processing, military, and industrial applications.
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