96 research outputs found
Fundamental noise limitations to supercontinuum generation in microstructure fiber
Broadband noise on supercontinuum spectra generated in microstructure fiber
is shown to lead to amplitude fluctuations as large as 50 % for certain input
laser pulse parameters. We study this noise using both experimental
measurements and numerical simulations with a generalized stochastic nonlinear
Schroedinger equation, finding good quantitative agreement over a range of
input pulse energies and chirp values. This noise is shown to arise from
nonlinear amplification of two quantum noise inputs: the input pulse shot noise
and the spontaneous Raman scattering down the fiber.Comment: 16 pages with 6 figure
Optical microbubble resonator
We develop a method for fabricating very small silica microbubbles having a micrometer-order wall thickness and demonstrate the first optical microbubble resonator. Our method is based on blowing a microbubble using stable radiative CO2 laser heating rather than unstable convective heating in a flame or furnace. Microbubbles are created along a microcapillary and are naturally opened to the input and output microfluidic or gas channels. The demonstrated microbubble resonator has 370 µm diameter, 2 µm wall thickness, and a Q factor exceeding 10
Super FSR tunable optical microbubble resonator
An optical resonator is often called fully tunable if its tunable range
exceeds the spectral interval that contains the resonances at all the
characteristic modes of this resonator. For the high Q-factor spheroidal and
toroidal microresonators, this interval coincides with the azimuthal free
spectral range. In this Letter, we demonstrate the first mechanically fully
tunable spheroidal microresonator created of a silica microbubble having a 100
micron order radius and a micron order wall thickness. The tunable bandwidth of
this resonator is more than two times greater than its azimuthal free spectral
range
Robust estimation of the expected survival probabilities from high-dimensional Cox models with biomarker-by-treatment interactions in randomized clinical trials
Recomendações metodológicas para a adoção da perspectiva da estruturação nos estudos organizacionais
Absolute frequency measurement of acetylene transitions in the region of 1540 nm
NRC publication: Ye
Supercontinuum generation in air-silica microstructured fibers with nanosecond and femtosecond pulse pumping
International audienc
- …