Search Results - "Pafchek, Robert"

Mid-infrared supercontinuum generation spanning 1.8 octaves using step-index indium fluoride fiber pumped by a femtosecond fiber laser near 2 µm by Salem, Reza, Jiang, Zack, Liu, Dongfeng, Pafchek, Robert, Gardner, David, Foy, Paul, Saad, Mohammed, Jenkins, Doug, Cable, Alex, Fendel, Peter

“…A nearly two-octave wide coherent mid-infrared supercontinuum is demonstrated in a dispersion-engineered step-index indium fluoride fiber pumped near 2 µm. The…”
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"Magic radius" phenomenon in thin-ridge SOI ring resonators: Theory and preliminary observations by Nguyen, Thach G, Tummidi, Ravi S, Pafchek, Robert M, Koch, Thomas L, Mitchell, Arnan

“…The lateral leakage loss mechanism of the TM-like mode in thin-ridge SOI ring resonators is significantly impacted by the ring radius and waveguide width. This…”
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Effect of Chromium-Gold and Titanium-Titanium Nitride-Platinum-Gold Metallization on Wire/Ribbon Bondability by Jianbiao Pan, Pafchek, R.M., Judd, F.F., Baxter, J.B.

“…Gold metallization on wafer substrates for wire/ribbon bond applications requires good bond strength to the substrate without weakening the wire/ribbon. This…”
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Label-free biosensors based on athermal silicon-on-insulator waveguides and a harmonic dithering technique by Kangbaek Kim, Pafchek, R. M., Koch, T. L.

“…We report a new high-sensitivity biosensor using athermal TM-mode SOI resonators with bulk and surface detection limits of 4.7×10 -7 RIU and ~100fg/mm 2 …”
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Effect of chromium-gold and titanium-titanium nitride-platinum-gold metallization on wire/ribbon bondability by Jianbiao Pan, Pafchek, R.M., Judd, F.F., Baxter, J.

“…Gold metallization on wafer substrates for wire/ribbon bond applications require good bond strength to the substrate without weakening the wire/ribbon. This…”
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Scattering loss in thin, shallow-ridge silion-on-insulator waveguides by Nguyen, T. G., Tummidi, R. S., Pafchek, R., Koch, T. L., Mitchell, A.

“…Roughness induced scattering in thin, shallow-ridge silicon on insulator waveguides is analyzed by coupled mode theory and verified experimentally. Roughness…”
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Athermal silicon waveguides for aqueous evanescent biosensor applications by Kangbaek Kim, Pafchek, R. M., Koch, T. L.

“…Shallow-ridge silicon ring resonator sensors designed for high-sensitivity TM mode operation are fabricated on silicon-on-insulator (SOI), demonstrating…”
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A novel method for fabricating optical fiber preforms by Kortan, A.Refik, Kopylov, Nonna, Özdaş, Engin, Pafchek, Robert

“…We describe here, a new, single-step method for fabricating single-mode preforms that can potentially eliminate process-induced optical scattering centers. In…”
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Modification of spontaneous emission rates in shallow ridge 8.3 nm erbium doped silica slot waveguides by Tummidi, R.S., Pafchek, R.M., Kangbaek Kim, Koch, T.L.

“…We show that conventional expressions for spontaneous emission into waveguide modes correctly predict broadband (non-resonant) Purcell enhancement in slot…”
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Highly stable fluoride glass by Elyamani, Abdessamad, Snitzer, Elias, Pafchek, Robert, Sigel, George H.

“…A new family of modified ZBLAN glass compositions has been synthesized which provides better stability against crystallization. A preliminary study of the…”
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