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The uncooled 25-Gbit/s direct modulation of a 1.3-μm horizontal-cavity surface-emitting laser was demonstrated. A fabricated laser, which is directly mountable on a high-frequency coplanar line, exhibited 25-Gbit/s eye openings up to 100°C.
We demonstrate experimental results and analytical formulation of slow-light-enhanced self-phase modulation limited only by three-photon absorption. We present nonlinear figure-of-merits on three-photon-limited ultrafast switching, and critical intensities for free-carrier effects in photonic crystals.
We present design, fabrication and characterization of thermo-optically tunable photonic crystal light modulator. Thermo-optic effect of silicon was utilized to change refractive index of silicon and photonic band dispersion to realize tunable photonic crystal devices.
We describe the development of a Faraday Rotation Spectroscopic trace-gas sensor for quantification of molecular oxygen. Static magnetic field and balanced detection of polarization rotation is proposed for high precision and ultra-low power operation.
The first demonstration of a silicon microring modulator with both an integrated resistive heater and diode-based temperature sensor is shown. The temperature-sensor exhibits a linear response for more than an 85 °C external temperature range.
A large signal analysis of a laser transistor based on AlGaInAs/InP long wavelength material system is carried out. Better eye diagrams over 40-Gbps modulation speed are obtained in laser transistors than that in laser diodes.
We demonstrate the formation of 1D and 2D plasma waveguide arrays induced by the strong interactions of non-collinearly femtosecond-pulse-induced filaments in air. The periodic self-channeling is evidenced by the direct observation of the filament coalescence.
We present the first experimental study of spatially-incoherent modulation instability for different spectral distributions. Characteristic behavior depends sensitively on the underlying profiles. The setup and results introduce a new experimental degree-of-freedom into nonlinear statistical optics.
We demonstrate a tunable module for delaying or advancing optical pulses using stimulated Brillouin scattering. A fractional advancement and delay of 0.31 and 0.82, respectively, have been achieved for 6.5 ns Gaussian pulses.
We report near-temperature-insensitive, highly linear oxide-confined directly modulated 850 nm-range VCSEL chips and fiber-coupled subassemblies operating up to 40 Gbit/s at < 10 kA/cm2 with a rise-time < 10 ps at up to 100°C.
A practical implementation of a 31.99Gbit/s DPSK CoWDM system using a 3-modulator array is compared to a 2-modulator odd/even configuration in terms of receiver sensitivity and phase influence on the crosstalk between the sub-carriers.
We report on experimental proof of principle for the operation of excitonic switches at temperatures around 100 K. The devices include the exciton optoelectronic transistor, the excitonic bridge modulator, and the excitonic pinch-off modulator.
The first label-free LEAC biosensor immunoassay demonstration is reported. CMOS chips with integrated photoconductor arrays detected 150 kDa tuberculosis related antibodies and 18 kDa protein antigens. The limit of detection for thickness change was 120 pm.
Using isotopically enriched carbon dioxide in a CO2 laser amplifier we eliminated the splitting of a picosecond pulse during amplification that usually results from modulations in the periodical spectrum caused by the rotational line structure.
Error-control coding is becoming increasingly important, in combination with advanced modulation methods, for improving the spectral efficiency of optical communication systems. This tutorial reviews fundamental limits on and promising practical architectures for modern FEC methods.
We introduce a feasible approach to obtaining dense light-bullets trains in nonlocal nonlinear dielectrics, such as nematic liquid crystals, thanks to the interplay between local and nonlocal nonlinearities and the temporal modulation instability.
We have successfully designed, built and operated a microlaser based on a AlGaInAs multiple quantum well (MQW) semiconductor saturable absorber (SESA). Optical characterization of the semiconductor absorber, as well as, the microlaser output is presented.
We propose DSP-based crosstalk cancellation in WDM optical interconnects, and investigate the performance of the scheme at 10.7 Gb/s through experimental implementation of a transmitter-based DSP algorithm and optical link simulations.
Incident-power-dependent extinction ratio of electroabsorption modulators is shown and theoretically investigated by using microscopic theory combined with heat-flux calculation. The phenomenon stems from voltage-dependent temperature rise and the calculated results agree well with the experiment.
We report a novel method for simulating distributed refractive index modulations for materials with the second-order electro-optic effect. The theory assimilates calculations of strains caused by the electrostrictive effect.
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