Search Results - "HILLMER, H"

Judd–Ofelt analysis and physical properties of erbium modified cadmium lithium gadolinium silicate glasses by Shaaban, Kh.S., Abdel Wahab, E. A., El-Maaref, A. A., Abdelawwad, M., shaaban, E. R., Yousef, El Sayed, Wilke, H., Hillmer, H., Börcsök, J.

“…Erbium doped 50SiO 2 -30Li 2 O- 1Gd 2 O 3 - (19 −  x ) CdO and x Er 2 O 3 glass system, where (0 ≤  x  ≥ 2.5), mol%, has been prepared by the conventional melt…”
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Focused terahertz radiation formed by coherently scattered surface plasmon polaritons from partially uncorrugated metal surfaces by Monnai, Y., Shinoda, H., Hillmer, H.

“…We present that a focus of terahertz radiation can be tailored based on coherent scattering of surface plasmon polaritons (SPPs) from a partially defected…”
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Ultralow biased widely continuously tunable fabry-Perot filter by Irmer, S., Daleiden, J., Rangelov, V., Prott, C., Romer, F., Strassner, M., Tarraf, A., Hillmer, H.

“…Optical filters capable of single control parameter-based wide tuning are implemented and studied. The surface micromachined Fabry-Perot filter consists of two…”
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Low-cost edge-emitting DFB laser arrays for DWDM communication systems implemented by bent and tilted waveguides by Hillmer, H., Klepser, B.

“…This paper emphasizes methodology concerning variations of the emission wavelengths of edge-emitting semiconductor lasers. We present a method based on tilted…”
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Optical amplification and stability of spiroquaterphenyl compounds and blends by Fuhrmann-Lieker, T., Lambrecht, J., Hoinka, N., Kiurski, M., Wiske, A., Hagelstein, G., Yurttagü, N., Abdel-Awwad, M., Wilke, H., Messow, F., Hillmer, H., Salbeck, J.

“…In this contribution, we present a systematic investigation on a series of spiroquaterphenyl compounds optimised for solid state lasing in the near ultraviolet…”
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Modeling of ultrawidely tunable vertical cavity air-gap filters and VCSELs by Prott, C., Romer, F., Ataro, E.O., Daleiden, J., Irmer, S., Tarraf, A., Hillmer, H.

“…Tunable vertical cavity devices including an air-gap integrated in the cavity have been designed, fabricated, and investigated. The ultrawide wavelength tuning…”
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Multiple air-gap filters and constricted mesa lasers: material processing meets the front of optical device technology by DALEIDEN, J, HILLMER, H

“…Real three-dimensional material structures enable enormous perspectives in the functionality of advanced electronic and optoelectronic III/V semiconductor…”
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Investigations of thermal crosstalk in laser arrays for WDM applications by Klepser, B., Hillmer, H.

“…Our studies on the thermal crosstalk of laser arrays with integrated thin-film heaters involved theoretical as well as experimental investigations. Comparing…”
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Tuning efficiency and linewidth of electrostatically actuated multiple air-gap filters by Römer, F., Prott, C., Irmer, S., Daleiden, J., Tarraf, A., Hillmer, H., Strassner, M.

“…We investigated the tuning efficiency of electrostatically actuated multiple air-gap filters fabricated in InP for dense wavelength division multiplex…”
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Potential for micromachined actuation of ultra-wide continuously tunable optoelectronic devices by HILLMER, H, DALEIDEN, J, PROTT, C, RÖMER, F, IRMER, S, RANGELOV, V, TARRAF, A, SCHÜLER, S, STRASSNER, M

“…Tailored scaling represents a principle of success that, both in nature and in technology, allows the effectiveness of physical effects to be enhanced…”
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Continuously tunable 1.55-μm VCSEL implemented by precisely curved dielectric top DBR involving tailored stress by Tarraf, A., Riemenschneider, F., Strassner, M., Daleiden, J., Irmer, S., Halbritter, H., Hillmer, H., Meissner, P.

“…We present an optically pumped and continuously tunable 1.55-μm vertical-cavity surface-emitting laser (VCSEL). The device shows 26-nm spectral tuning range,…”
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Tailored scaling: a possibility to improve the performance of ultra-wide continuously tunable photonic devices by ATARO, E, PROTT, C, RÖMER, F, HILLMER, H

“…We studied the effect of scaling the size of DBR-based micromechanical tunable vertical micro-cavity devices based on electro-mechanical model calculations. An…”
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Optically detected carrier transport in III/V semiconductor QW structures: experiments, model calculations and applications in fast 1.55 μm laser devices by Hillmer, H., Marcinkevičius, S.

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Spectroscopic properties and Judd-Ofelt analysis of Dy3+ ions in molybdenum borosilicate glasses by Shaaban, KH.S., El-Maaref, A.A., Abdelawwad, M., Saddeek, Y.B., Wilke, H., Hillmer, H.

“…Borosilicate glasses containing MoO3 and Dy2O3 were prepared by the melt quenching technique. The structure and the thermal properties of these glasses have…”
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Static and dynamic properties of InGaAsP-InP distributed feedback lasers-a detailed comparison between experiment and theory by Hansmann, S., Walter, H., Hillmer, H., Burkhard, H.

“…We have investigated the static and dynamic characteristics of phase shifted InGaAsP-InP DFB lasers mainly focusing on a comprehensive comparison between…”
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Chirped gratings for DFB laser diodes using bent waveguides by Hillmer, H., Magari, K., Suzuki, Y.

“…The authors propose a method capable of providing arbitrarily chirped DFB (distributed feedback) gratings using bent waveguides on homogeneous grating fields…”
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10-Gb/s standard fiber transmission using directly modulated 1.55-μm quantum-well DFB lasers by Mohrdiek, S., Burkhard, H., Steinhagen, F., Hillmer, H., Losch, R., Schlapp, W., Gobel, R.

“…10-Gb/s long-haul transmission on standard single-mode fibers at 1.55 μm with intensity modulated, low-chirp MQW DFB lasers is investigated. Successful…”
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Variation of coupling coefficients by sampled gratings in complex coupled distributed-feedback lasers by Hansmann, S., Hillmer, H., Walter, H., Burkhard, H., Hubner, B., Kuphal, E.

“…We present an efficient method for an almost arbitrary variation of the complex coupling coefficient of distributed feedback lasers by using superstructure…”
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Tailored DFB laser properties by individually chirped gratings using bent waveguides by Hillmer, H., Grabmaier, A., Hansmann, S., Zhu, H.-L., Burkhard, H., Magari, K.

“…DFB lasers with continuously and arbitrarily chirped gratings of ultrahigh spatial precision are implemented by a method we proposed recently, using bent…”
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Photoexcited carrier dynamics in InAlGaAs/InP quantum well laser structures by Marcinkevičius, S., Hillmer, H., Lösch, R., Olin, U.

“…Experimental investigations of carrier transport and capture into quantum wells are performed for InAlGaAs/InP laser structures. Time-resolved…”
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