154 research outputs found
Incidental diagnosis of blastic plasmacytoid dendritic cell neoplasm in skin excision for basal cell carcinoma
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/146307/1/cup13338.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/146307/2/cup13338_am.pd
New Analytical Approach for Computation of Band Structure in One-dimensional Periodic Media
In this paper, we present a new approach for the exact calculation of band
structure in one-dimensional periodic media, such as photonic crystals and
superlattices, based on the recently reported differential transfer matrix
method (DTMM). The media analyzed in this paper can have arbitrary profile of
refractive index. We derive a closed form dispersion equation using
differential transfer matrix formalism, and simplify it under the assumptions
of even symmetry and real-valued wavenumber. We also show that under normal
incidence both TE and TM modes must have the same band structure. Several
numerical test cases are also studied and discussed
Optimum operation of single cavity photonic switches
In this work, an optimum frequency is found for the operation of single cavity photonic switches. At this optimum point, the transmission contrast of ON and OFF states takes its highest value, while keeping the device power threshold relatively low and the device speed acceptably high. Then, the dynamic behavior of a typical single cavity all optical switch is investigated in the optimum operation point through temporal Coupled Mode Theory. Switching speed and power are discussed, and the device is shown to be applicable for telecommunication and data processing applications. The analysis is quite general, and can be used for resonant structures, such as photonic crystals and microring resonators, in both side coupled and direct coupled configurations
Distributed Measurement of Signal Power Evolution in a Phase Sensitive Parametric Amplifier
A method to measure the signal power evolution along phase-sensitive parametric amplifiers is proposed using Brillouin optical time-domain analysis. Different evolutions along the fiber are reported by varying input wave phases, including amplification and de-amplification
Mapping Dispersion Fluctuations along Optical Fibers Using Brillouin Probing and a Fast Analytic Calculation
A simple analytic formula is derived to extract tiny dispersion fluctuations along highly nonlinear fibers from distributed measurements of parametric gain. A refined BOTDA scheme, suitable to track Kerr processes, enables low noise measurements
- …