Search Results - "Ghalmi, S."

Spatially and spectrally resolved imaging of modal content in large-mode-area fibers by Nicholson, J W, Yablon, A D, Ramachandran, S, Ghalmi, S

“…A new measurement technique, capable of quantifying the number and type of modes propagating in large-mode-area fibers is both proposed and demonstrated. The…”
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Ultra-large effective-area, higher-order mode fibers: a new strategy for high-power lasers by Ramachandran, S., Fini, J.M., Mermelstein, M., Nicholson, J.W., Ghalmi, S., Yan, M.F.

“…This paper describes the physics and properties of a novel optical fiber that would be attractive for building high‐power fiber lasers and amplifiers. Instead…”
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A passively-modelocked, Yb-doped, figure-eight, fiber laser utilizing anomalous-dispersion higher-order-mode fiber by Nicholson, J W, Ramachandran, S, Ghalmi, S

“…Modelocking in an Yb-doped figure-eight fiber laser is demonstrated utilizing anomalous dispersion from an LP(02) higher-order-mode fiber for dispersion…”
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A higher-order-mode erbium-doped-fiber amplifier by Nicholson, J W, Fini, J M, DeSantolo, A M, Monberg, E, DiMarcello, F, Fleming, J, Headley, C, DiGiovanni, D J, Ghalmi, S, Ramachandran, S

“…We demonstrate the first erbium-doped fiber amplifier operating in a single, large-mode area, higher-order mode. A high-power, fundamental-mode, Raman fiber…”
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Fabrication of miniature optical fiber and microfiber coils by Sumetsky, M., Dulashko, Y., Ghalmi, S.

“…We demonstrate a technique for simultaneous drawing, tapering, and coiling of a silica optical fiber that is locally heated by a CO 2 laser. It allows us to…”
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Measurement of multipath interference in the coherent crosstalk regime by Ramachandran, S., Nicholson, J.W., Ghalmi, S., Yan, M.F.

“…We compare various techniques to measure multipath interference (MPI) in devices exhibiting distributed coherent crosstalk. A notable example of devices in…”
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Evolution and systems impact of coherent distributed multipath interference by Ramachandran, S., Ghalmi, S., Bromage, J., Chandrasekhar, S., Buhl, L.L.

“…We demonstrate an emulator that captures the coherent distributed nature of multipath interference in few-mode fiber devices. Coherent interference in these…”
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High-energy (nanojoule) femtosecond pulse delivery with record dispersion higher-order mode fiber by Ramachandran, S, Yan, M F, Jasapara, J, Wisk, P, Ghalmi, S, Monberg, E, Dimarcello, F V

“…Delivery of high peak-power femtosecond pulses with fibers is constrained by nonlinear distortions accumulated during pulse propagation. We address this…”
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Tunable dispersion compensators utilizing higher order mode fibers by Ramachandran, S., Ghalmi, S., Chandrasekhar, S., Ryazansky, I., Yan, M.F., Dimarcello, F.V., Reed, W.A., Wisk, P.

“…We demonstrate a novel tunable dispersion compensator that utilizes higher order mode fibers and switchable fiber gratings. The device is broad band and…”
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Record bandwidth, spectrally flat coupling with microbend gratings in dispersion-tailored fibers by Ramachandran, S., Yan, M.F., Monberg, E., Dimarcello, F.V., Wisk, P., Ghalmi, S.

“…We demonstrate resonant grating couplers with the broadest bandwidth (565 nm) reported to date, using microbend gratings in dispersion-optimized few-mode…”
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Electrical spectrum measurements of dispersion in higher order mode fibers by Nicholson, J.W., Ramachandran, S., Ghalmi, S., Monberg, E.A., DiMarcello, F.V., Yan, M.F., Wisk, P., Fleming, J.W.

“…We present a novel technique for measuring the chromatic dispersion of the higher order mode of an optical fiber. The measurement technique is simple,…”
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Biosensors employing ionic self-assembled multilayers adsorbed on long-period fiber gratings by Wang, Zhiyong, Heflin, J.R., Van Cott, Kevin, Stolen, Rogers H., Ramachandran, Siddharth, Ghalmi, Samir

“…We demonstrate that ionic self-assembled multilayers (ISAMs) adsorbed on long period gratings (LPGs) function effectively as biosensors using…”
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Enhanced resolution in nonlinear microscopy using the LP02 mode of an optical fiber by Smith, C, Ghalmi, S, Balling, P, Ramachandran, S, Nicholson, J W

“…It is demonstrated that the lateral resolution of a non-linear scanning multi-photon microscope can be improved significantly by using the light from an LP 02…”
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Nanosecond pulse amplification in a higher-order mode erbium-doped fiber amplifier by Nicholson, J W, DeSantolo, A M, Ghalmi, S, Fini, J M, Fleming, J, Monberg, E, DiMarcello, F, Ramachandran, S

“…The nonlinear properties of a nanosecond pulse in a higher-order-mode, Er-doped-fiber amplifier with 2440 μm 2 effective area are compared to a conventional…”
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SBS gain efficiency measurements and modeling in a 1714 μm^2 effective area LP_08 higher-order mode optical fiber by Mermelstein, M. D., Ramachandran, S., Fini, J. M., Ghalmi, S.

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High energy (nanojoule) femtosecond pulse delivery with highly dispersive higher order mode fibers by Ramachandran, S, Yan, M.F, Jasapara, J, Wisk, P, Ghalmi, S, Monberg, E, Dimarcello, F.V

“…We utilize the highly dispersive nature of the LP02 mode (dispersion~ -900 ps/nm-km) to enable SPM-distortion free fs-pulse propagation in a small Aeff fiber…”
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Ionic self-assembled multilayers adsorbed on long period fiber gratings for use as biosensors by Zhiyong Wang, Heflin, J.R., Vancott, K., Stolen, R.H., Ramachandran, S., Ghalmi, S.

“…We demonstrate that ionic self-assembled multilayers (ISAM) adsorbed on long period gratings (LPG) function effectively as biosensors. Theoretical simulations…”
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Evolution and systems impact of coherent distributed multipath interference by Ramachandran, S, Ghalmi, S, Bromage, J, Chandrasekhar, S, Buhl, L L

“…We demonstrate an emulator that captures the coherent distributed nature of multipath interference in few-mode fiber devices. Coherent interference in these…”
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SBS gain efficiency measurements and modeling in a 1714 mum(2) effective area LP(08) higher-order mode optical fiber by Mermelstein, M D, Ramachandran, S, Fini, J M, Ghalmi, S

“…The stimulated Brillouin scattering (SBS) gain efficiencies were measured in the LP(08) and LP(01) modes of a higher-order-mode optical fiber. Gain…”
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91 fs pulses from an Yb-doped figure-eight fiber-laser dispersion compensated with higher-order-mode fiber by Nicholson, J.W., Ramachandran, S., Ghalmi, S.

“…Modelocking in Yb-doped figure-eight fiber lasers is demonstrated utilizing dispersion compensation from a higher-order-mode module with anomalous dispersion…”
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