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A novel high speed (sub-gigahertz) and large deflection angle (>30°) beam switching in transverse-mode coupled cavity VCSEL is proposed and demonstrated. The record-high angular switching speed of 1.3×1011 °/s is achieved with narrow beam divergence of below 4° and extinction ratio of 8 dB.
We demonstrate a compact vortex beam emitter laterally integrated with VCSEL for OAM mode multiplexing. The device generates an azimuthally polarized vortex beam from a ring-shape waveguide laterally connected with an electrically pumped 980nm VCSEL.
We describe femtosecond fiber laser systems optimized for high value applications in precision industrial micro-machining. Unprecedented system performance and reliability enable unique manufacturing capabilities for touch screen displays and other difficult-to-machine parts.
Inside any wave-guiding structure, such as optical fibers, light propagates in a discrete set of modes. Each mode is defined by its direction of propagation, amplitude profile, phase distribution and polarization. Proper modal excitation and manipulation can yield to novel and low cost optical devices. This paper covers the concepts of designing low cost and functional optical fiber devices based...
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