Femtosecond laser highly-efficient plane processing based on an ...A simple technique is proposed for highly-efficient plane processing fully based on femtosecond laser beam shaping. The laser intensity distribution is transformed from a Gaussian to a donut shape. As the donut-shaped focus seems like a flat top from the ...
Self-starting simple structured dual-wavelength mode-locked erbi... ... . In this laser, there are two gain humps located at the 1530 nm region and the 1550 nm region, respectively. Along with the length of EDF increasing, the intensity of the hump at 1530 nm region is gradually suppressed because of the re-absorption of
Three-dimensional multiple optical cages formed by focusing doub... ... azimuthally polarized field and an outer ring with a radially polarized field and a phase factor can produce an optical cage with a dark region enclosed by higher intensity. The shape of the cage can be tailored by appropriately adjusting the parameters
Switchable dual-wavelength Q-switched fiber laser using multilay... ... experimentally multilayer BP flakes coated on microfiber (BCM) as a saturable absorber with a modulation depth of 16% and a saturable intensity of 6.8 MW/cm2. After inserting BCM into an Er-doped fiber ring laser, a stable dual-wavelength Q-switched ...
High-speed and high-performance polarization-based quantum key d...Side channel effects such as temporal disparity and intensity fluctuation of the photon pulses caused by random bit generation with multiple laser diodes in high-speed polarization-based BB84 quantum key distribution (QKD) systems can be eliminated by ...
Directly writing binary multi-sector phase plates on fused silic...Light carrying orbital angular momentum (OAM) has a spatial distribution of intensity and phase, which attracts considerable interest regarding several potential applications in optical and quantum scenarios recently. Spiral phase plates are commonly used ...
Passive Q-switching in an erbium-doped fiber laser using tungste... ... ferrules within the erbium-doped fiber laser, is used to effectively modulate the laser cavity losses. The WSSe-based SA has a saturation intensity of ～0.006 MW/cm2 and a modulation depth of 7.8%, giving an optimum Q-switched laser output with a maximum ...
Silicon intensity Mach–Zehnder modulator for single lane 100 Gb/...In this paper, a substrate removing technique in a silicon Mach–Zehnder modulator (MZM) is proposed and demonstrated to improve modulation bandwidth. Based on the novel and optimized traveling wave electrodes, the electrode transmission loss is reduced, ...
Solid-state green-light-emitting upconversion coherent random la... ... determined to be about 40 kW/cm2. Above the threshold, the emission intensity increased sharply with the increasing pump intensity. Moreover, a narrow multi-peaks structure was observed in the green-light-emission band, and the positions ...
Simple Raman scattering sensor integrated with a metallic planar... ... of the sub-millimeter scale. The oscillating ultrahigh order modes excited by the direct coupling method yield high optical intensity at resonance, which is different from the conventional strategy to create localized “hot spots.” The observed excitation ...
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