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We have observed the spatially-resolved optical amplification of femtosecond VUV pulses at 126 nm using an OFI Ar2* amplifier. The maximum amplification ratio of 2.57 was observed, which corresponded to the optical gain of 0.94 cm−1.
We have developed a sub-two-cycle intense infrared light source using novel BiB3O6 (BIBO)-based optical parametric amplifiers for the generation of high harmonics in soft X rays. The cutoff of high harmonics has extended to ∼320 eV, which is well beyond the carbon K edge. The spectral structures and their dependences on the carrier-envelope phase strongly suggest the generation of single isolated...
We review recent advances in the development of slab-coupled optical waveguide (SCOW) devices, progress toward a flexible photonic integration platform containing both conventional high-confinement and SCOW ultra-low confinement devices, and applications of this technology.
We propose a multiband 60-GHz radio-over-fiber (RoF) system to offer converged legacy and multi-gigabit wireless services. Real-time WiFi and 1-Gb/s OOK data over fiber and 60-GHz wireless propagation has been demonstrated for the first time.
Space-division multiplexing with multi-core fiber is an attractive technology to increase a system capacity drastically. In this paper, the feasibility of trans-oceanic transmission using multi-core fibers is discussed.
We develop the 100Gbit/s compact receiver module with the built-in optical de-multiplexer in the 6.7 mm-width package. The minimum receiver sensitivity of the receiver module at 28Gbit/s is successfully achieved up to −12 dBm in the case temperature range from −10 °C to 80 °C.
We compare using nonlinear fiber to a silicon nanophotonic waveguide in implementing a reconfigurable microwave photonic filter. Additional taps are generated via four wave mixing and tap levels are controlled by a programmable filter.
We experimentally demonstrate wavelength conversions of 50-Gbps 36QAM and 60-Gbps 64QAM through four-wave mixing in highly-nonlinear fiber. Error free operations are successfully achieved for converted high-order QAMs with negligible power penalty at BER of 10−3.
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