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Philip Colosimo

Senior Physicist

Email

pcolosimo@apl.washington.edu

Phone

206-543-3148

Education

B.S. Physics and English, University of Michigan-Ann Arbor, 1998

Ph.D. Physics, SUNY-Stony Brook, 2007

Publications

2000-present and while at APL-UW

Sensing RF and microwave energy with fiber Bragg grating heating via soft ferromagnetic glass-coated microwires

Colosimo, P., A. Chen, J. Devkota, H. Srikanth, and M.-H. Phan, "Sensing RF and microwave energy with fiber Bragg grating heating via soft ferromagnetic glass-coated microwires," Sensor Actuat. A-Phys., 210, 25-31, doi:10.1016/j.sna.2014.01.038, 2014.

More Info

1 Apr 2014

We present results from a fiber Bragg grating-based microwave energy sensor. The sensor relies on a soft ferromagnetic glass-coated microwire that is bonded to the cladding of the grating. The microwire absorbs microwave energy and heats up thus raising the temperature of the fiber Bragg grating. Compared to a similar sensor that uses gold to absorb electromagnetic radiation, the microwire yields a sensor with greater sensitivity (~10 times at f = 3.25 GHz) relative to the perturbation of the microwave field. With the sensor reported here, the best sensitivity to electromagnetic radiation corresponds to AC electric fields that have an an average electric energy density of approximately 1.3 mJ/m3.

Tailoring magnetic and microwave absorption properties of glass-coated soft ferromagnetic amorphous microwires for microwave energy sensing

Devkota, J., P. Colosimo, A. Chen, V.S. Larin, H. Srikanth, and M.H. Phan, "Tailoring magnetic and microwave absorption properties of glass-coated soft ferromagnetic amorphous microwires for microwave energy sensing," J. Appl. Phys., 115, 17A525, doi:10.1063/1.4868329, 2014.

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13 Mar 2014

A comparative study of the magnetic softness, giant magnetoimpedance (GMI) effect, and microwave absorption capacity of glass-coated amorphous Co64.63Fe4.97B16Si11Cr3.4Ni0.02 and Co68B15Si10Mn7 microwires has been performed. We find that the Mn-containing sample exhibits a softer magnetic property, a larger GMI ratio, and a higher microwave absorption capacity as compared to those with a Fe-Cr-Ni composition. As a result, the Mn-containing microwire is shown to be a better microwave absorber for fabrication of a new class of microwave energy sensor based on Fiber Bragg Grating. Our study emphasizes a correlation between the magnetic softness, GMI, and microwave absorption in the microwires and paves the way to improving the performance of such sensors by tailoring their soft magnetic properties.

Inventions

Fiber-optic, Distributed Pressure Sensor

Record of Invention Number: 45350

Philip Colosimo

Disclosure

19 Aug 2010

Acoustics Air-Sea Interaction & Remote Sensing Center for Environmental & Information Systems Center for Industrial & Medical Ultrasound Electronic & Photonic Systems Ocean Engineering Ocean Physics Polar Science Center
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