Few-layer TiSe2 as a saturable absorber for nanosecond pulse generation in 2.95  μm bulk laser

Optics Letters
Hongkun NieJingliang He

Abstract

1T-phase titanium diselenide (1T-TiSe2), a model two-dimensional (2D) transition metal dichalcogenide, has attracted much attention due to its intriguing electrical and optical properties. In this work, a 1T-TiSe2-based high-quality large-area saturable absorber (SA) (1T-TiSe2-SA) was successfully fabricated with the liquid-phase exfoliation method. With the as-prepared 1T-TiSe2-SA, a stable, passively Q-switched laser operating at 2.95 μm was first realized. Under an absorbed pump power of 3.35 W, the maximum average output power was 130 mW with a slope efficiency of 5%. A pulse width of 160.5 ns was obtained, which is the shortest among 3.0 μm passively Q-switched lasers ever achieved with 2D materials as SAs, to the best of our knowledge. The results indicate that 1T-TiSe2 is a promising alternative as a nonlinear optical modulator for short-pulse laser generation near the 3.0 μm mid-infrared region.

References

Apr 5, 2014·Advanced Materials·Shuxian WangJiyang Wang
Oct 11, 2014·Nano Letters·Claudia RuppertTony F Heinz
Mar 15, 2015·Physical Review Letters·G MonneyH Beck
Feb 26, 2016·Optics Letters·Mingqi FanGünter Huber
Sep 29, 2017·Optics Letters·Xiancui SuJingliang He

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Citations

Feb 27, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Ashish KumarO P Sinha

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