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
Abstract
We investigated the nonlinear optical properties of . First, we measured the nonlinear absorption coefficient and the nonlinear refractive index of a thin film using open-aperture (OA) and closed-aperture (CA) Z-scan techniques. was shown to possess both saturable absorption and self-defocusing properties. The nonlinear absorption coefficient of was measured to be , and its nonlinear refractive index was at 1560 nm. Next, a fiberized saturable absorber (SA) based on 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 and , respectively, for the transverse electric mode, while they are and for the transverse magnetic mode. Using the prepared SA, stable soliton pulses with a temporal width of were produced from an erbium-doped fiber ring cavity. To the best of the authors’ knowledge, this is the first demonstration of using a -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.