Abstract
All-optical modulators based on two-dimensional (2D) materials hold promising application as key components in the fields of all-optical signal processing and fiber optic communications. In this study, we present an all-optical modulator based on PtSe2 nanosheets integrated with micro-nano fibers (PtSe2-MF) with low power and high stability. PtSe2 nanosheets were deposited on the surface of micro-nano fibers with a diameter of approximately 6 µm using an optical deposition method. A tunable laser with a wavelength of 1550 nm was used as the signal light for modulation, and the 980 nm pump light was coupled with the 1550 nm signal light into the micro-nano fibers (MFs). And the all-optical intensity modulation effect at mW level power was achieved by varying the optical power of the pump light and taking advantage of the absorption of light by PtSe2, to produce light matter interaction. The modulation depth of PtSe2-MF for signal light was measured to be 11.8 dB, the modulation efficiency was 0.295 dB/mW, and the rise and fall response times of the modulation were 22.5 ms and 24.2 ms, respectively. The modulation efficiency of the device only changed by 4.4% after being exposed to the environment for three months, indicating that it still has long-term stability for more than three months. Research has shown that PtSe2-MF has advantages of low power, fast response, high modulation efficiency, and high stability. It has broad application prospects in the field of all-optical modulation.
Published Version
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