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Two-dimensional (2D) materials have emerged as attractive mediums for fabricating versatile optoelectronic devices. Recently, it has been discovered that several types of 2D materials possess both the saturable absorption effect and large nonlinear refractive index, such as graphene, topological insulator (TI), and Molybdenum Disulfide (MoS2). Taking advantage of the unique nonlinear optical properties...
An ytterbium-doped mode-locked fiber laser with a microfiber-based graphene saturable absorber (GSA) was proposed. By controlling cavity parameters such as pump power level and orientations of PCs, both multiple polarization locked vector solitons (PLVSs) and polarization rotation vector solitons (PRVSs) were investigated.
We developed fiber bundle type fan-out (FBF) for 19-core multicore fiber (MCF). Insertion loss < 1.15 dB was confirmed for FBF-MCF-FBF configuration. Loss variation < ±0.12 dB was confirmed from −10 to 60 degrees C.
We demonstrated the fabrication of long period fiber gratings written in two-mode fiber as mode converter to realize the mode conversion between LP01 mode and LP11 mode with an efficiency of up to 99.9%.
We design and fabricate a sidewall-corrugated polymer waveguide grating to achieve conversion between the LP01 and LP11a modes. A typical fabricated device offers a conversion efficiency >99% with a bandwidth of 20 nm and a thermal-tuning sensitivity of −4.1 nm/°C over the S+C+L band. This mode converter could be integrated with other polymer waveguide devices to achieve advanced functions for...
An all-fiber based tapered mode selective coupler (AFTMSC) is proposed and it can convert LP01 mode to higher-order modes (LP11, LP21 and LP02 mode) with coupling efficiency better than 70% in wavelength range of 1450nm to 1650nm.
We demonstrate 10×200 Gb/s real-time transmission over 5 types of fiber with flex-grid PDM-16QAM systems. Performance of different fiber is compared and more than 2000km transmission over ULL and EX2000 is achieved with EDFA only.
We have investigated the physical-contact conditions between seven-core multi-core fiber and fiber bundle fan-out connectors by both experimental and simulation approach. The results show good agreements and indicate the validity of the physical-contact simulation model.
Few-layer transition metal dichalcogenides such as molybdenum disulfide (MoS2) present new opportunities for photonic devices. Here, we review recent progress in few-layer MoS2-based nonlinear optics and state-of-the-art pulsed lasers using this new nanomaterial.
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