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Zhiqi Sui et al.
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Jialin Li et al.
Summary: Interface interactions in 2D vertically stacked heterostructures are important in optoelectronic applications, and recent research has shown promising performance of photodetectors based on graphene/InSe heterostructures. However, there is still insufficient understanding of the nonlinear optical properties of graphene/InSe heterostructures. In this study, a graphene/InSe heterostructure was fabricated by mechanical exfoliation and the optically induced charge transfer between the heterostructures was investigated. The results revealed a large built-in electric field at the interface and demonstrated the potential application of the heterostructure in a mode-locked laser. This work provides deeper insights into the interface interactions and enriches the range of saturable absorbers for ultrafast photonics applications.
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Lingfa Zeng et al.
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Summary: The carbon nanoparticles (CNPs) were used as a saturable absorber (SA) for Q-switching an erbium doped fiber laser (EDFL). The Q-switched EDFL emitted at a wavelength of 1566 nm with a spectral bandwidth of 1.72 nm. The CNPs-based SA exhibited good pulse stability and the pulse frequency and width could be controlled by varying the pump power. The experimental results showed that the CNPs-based SAs could be equivalent or even superior to commonly used nano-particle SAs and had potential applications in pulsed laser sources.
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Jawad Mirza et al.
Summary: In this paper, a novel and widely tunable and switchable multiwavelength erbium-doped fiber laser (EDFL) operating in the 1524-1650 nm wavelength range is proposed and demonstrated through numerical simulations. The EDFL is based on a single ring cavity and a single forward pump source operating at 980 nm wavelength. The length of the erbium-doped fiber and pumping configuration is optimized to enable a wide tuning of 126 nm with an average lasing power of 15 dBm. Switchable multiple wavelengths are generated from the EDFL through an intracavity tunable optical filter (TOF) and a specially designed out-of-cavity comb filter (CF). The proposed EDFL is low cost, efficient, and highly stable with an average output power of around 15 dBm for 10% output coupling ratio over a 126 nm wide tuning range covering C-, L- and U-bands.
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Suziana Omar et al.
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S. Ooi et al.
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V Zinnecker et al.
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Manuel Duran-Sanchez et al.
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Lihui Pang et al.
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Gang Yao et al.
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CHINESE OPTICS LETTERS
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Song Yang et al.
Summary: Highly monodisperse and perfect crystalline PbS/CdS quantum dots with bright infrared fluorescence emissions have been synthesized and incorporated into a thin film as a saturable absorber, leading to stable Q-switched and mode-locked laser pulses.
JOURNAL OF MATERIALS CHEMISTRY C
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