Photonics Research, 2019, 7 (9): 09000984, Published Online: Aug. 8, 2019   

Investigation of nonlinear optical properties of rhenium diselenide and its application as a femtosecond mode-locker Download: 591次

Author Affiliations
School of Electrical and Computer Engineering, University of Seoul, Seoul 02504, South Korea
Abstract
We investigated the nonlinear optical properties of ReSe2. First, we measured the nonlinear absorption coefficient and the nonlinear refractive index of a ReSe2 thin film using open-aperture (OA) and closed-aperture (CA) Z-scan techniques. ReSe2 was shown to possess both saturable absorption and self-defocusing properties. The nonlinear absorption coefficient of ReSe2 was measured to be (5.67±0.35)×103 cm/GW, and its nonlinear refractive index was (2.81±0.13)×10 2 cm2/GW at 1560 nm. Next, a fiberized saturable absorber (SA) based on ReSe2 was fabricated with a side-polished fiber platform and was tested as an ultrafast mode-locker capable of producing femtosecond pulses operating at a wavelength of 1560 nm. The estimated modulation depth and saturation power are 3.9% and 42 W, respectively, for the transverse electric mode, while they are 2.4% and 53 W for the transverse magnetic mode. Using the prepared SA, stable soliton pulses with a temporal width of 862 fs were produced from an erbium-doped fiber ring cavity. To the best of the authors’ knowledge, this is the first demonstration of using a ReSe2-based SA for femtosecond mode-locked pulse generation.

Jinho Lee, Kyungtaek Lee, Suhyoung Kwon, Bumsoo Shin, Ju Han Lee. Investigation of nonlinear optical properties of rhenium diselenide and its application as a femtosecond mode-locker[J]. Photonics Research, 2019, 7(9): 09000984.

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