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We provide an overview of the capabilities and limitations of slow light optical buffers. A number of fundamental waveguide properties such as loss and dispersion severely limit the opportunities for practical slow light optical buffering.
Experiments and simulation demonstrate an instability of the intracavity pumped optical parametric oscillator against bidirectional operation. It is shown that nonlinear losses inside the signal cavity can stabilize the bidirectional operation.
We present a systematic numerical study of metamaterials integrated with gain media to achieve composite metamaterials at terahertz and infrared wavelength with reduced losses. The impact of spatial dispersion on the effective permeability resonance restoration is emphasized.
We embedded thin (down to 2 mum diameter) tapered fibres in silica aerogel with low loss. The aerogel is rigid but behaves refractively like air, protecting the tapered fibre without disturbing light propagation along it.
Stoichiometric low loss Tellurium dioxide, TeO2, films have been produced by reactive magnetron RF sputtering. Long rib waveguides with very low loss are fabricated using reactive ion etching techniques. As-deposited TeO2 films and waveguides with propagation loss around or below 0.1 dB/cm at 1550 nm have been achieved.
A simple chemical method for reducing free-carrier lifetime in silicon photonics while maintaining low optical loss is presented. Lifetimes of ~ 300 ps for optical losses of ~ 0.4 cm-1 are achieved. Ramifications for nonlinear optics are discussed.
We use a heterodyne NSOM with superluminescent diode illumination to measure the loss in an SOI waveguide around a bend. For a bend of radius 10 mum, we measure loss of 0.09 dB.
A novel ultra-low loss single-mode hollow-core waveguide using high-contrast grating (HCG) is proposed and simulated. The loss can be as low as 0.006 dB/m, three orders of magnitude lower than the state-of-art chip-scale waveguides.
We report plasmonic Fabry-Perot nano-cavities formed by high aspect ratio metal mirrors on a metal surface. Quality factors from 100-200 were obtained, limited by plasmonic losses and fin scattering at short and long wavelengths respectively.
We report an efficient technique to measure gain and losses of quantum cascade lasers (QCLs). It consists on the analysis of the Fabry-Perot fringes induced by the optical injection of a chirped distributed feedback QCL.
We show that with sufficient gain, a mixture of two semiconductor quantum dots can produce an isotropic effective dielectric constant that is lossless and negative. This permits small-scale optical mode volume and lossless waveguides.
We have succsessfully developed blue-violet laser diodes having the world's highest output power of 450 mW by introducing a novel facet coating structure, reducing the internal loss in devices, and making a cavity length long.
We demonstrate high confinement, low loss silicon nitride ring resonators with intrinsic Q of 4,000,000 in the telecommunication C-band. We measure the scattering and absorption losses to be below .08 dB/cm and .02 dB/cm, respectively.
This paper presents an overview of advances in highly-integrated photonic networks for emerging many-core processors. It explores the tight interaction among logical and physical implementations of all-to-all core-to-core and core-to-DRAM networks, and underlying photonic devices.
We developed a three terminal mid-infrared quantum cascade laser. The third terminal allows one to electrically modulate the optical losses and thus the laser output-independently of the laser's driving current.
Optical switching functionality is demonstrated in PCB integrated multimode passive polymer waveguides using a localised liquid-crystal cladding structure. Waveguide switching contrast of 15 dB is achieved with only 0.5 dB of on-state excess loss.
We have generated and measured an approximation of an optical Schrodinger cat state by photon subtraction from a squeezed state. Using single-photon avalanche photodiode detectors and photon-number-resolving transition edge sensors, we were able to extract Wigner distributions for one or two photons subtracted from the squeezed state, resulting in both an odd and even cat state. The one-photon-subtracted...
We quantify contributions to threshold-current in state-of-the-art 1.55 mum GaInNAsSb lasers and the affect of layer design and nitrogen level. Non-radiative current is independent of nitrogen content (3.0-3.3%) but linked to the GaNAs barriers.
We report an ultracompact SOI add-drop microring filter with a 1.5 mum-radius, a wide FSR of 52 nm, a wide bandwidth of 210 GHz, with 2.9 dB insertion loss and nearly 25 dB extinction for on-chip optical interconnect applications.
A compact coupled-resonators flat-band filter with a large bandwidth (~3.3 nm), large free-spectral range (~18 nm), low crosstalk (<-12 dB) and negligible insertion loss (<0.5 dB) is demonstrated on a silicon-on-insulator platform with focused applications for on-chip optical interconnects.
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