Franko Küppers

University of Arizona

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Oktay Yilmazoglu

Technical University of Darmstadt

A. Chipouline

Skolkovo Institute of Science and Technology

Mohammadreza Malekizandi

Technical University of Darmstadt

Shihab Al‐Daffaie

Eindhoven University of Technology

Christian Gierl–Mayer

TU Wien

Quang Trung Le

University of Arkansas at Fayetteville

Tuomo von Lerber

University of Helsinki

Sujoy Paul

Visvesvaraya National Institute of Technology

Ahid S. Hajo

Technical University of Darmstadt

H.L. Hartnagel

Technical University of Darmstadt

Cooperative Institutions

Technical University of Darmstadt

Merck (Germany)

Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute

Technical University of Munich

Deutsche Telekom (Germany)

University of Arizona

Siemens (Germany)

Technische Universität Berlin

Schott (Germany)

Deutsche Telekom (United Kingdom)

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RZ versus NRZ modulation format for dispersion compensated SMF-based 10-Gb/s transmission with more than 100-km amplifier spacing

IEEE Photonics Technology Letters (1999)

C. Caspar H.-M. Foisel Andreas Gladisch Norbert Hanik Franko Küppers

We compared numerically and experimentally the transmission behavior of return-to-zero (RZ) and nonreturn-to-zero (NRZ) modulated signals, 10 Gb/s were transmitted over 2040-km standard single-mode fiber using an alternating dispersion compensation scheme in a recirculating loop with 102 km amplifier spacing. Receiver sensitivities of -33 dBm (NRZ) and -35 dBm (RZ) could be achieved. RZ allows for a simple linear dispersion compensation whereas NRZ suffers from nonlinear signal distortion. NRZ requires under-compensation of the linear chromatic dispersion dependent on signal power and transmission length. Therefore, NRZ makes network design more difficult.

Modulation (music)

SIGNAL (programming language)

Distortion (music)

10.1109/68.752555

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Citations (40)

High Performance ZnSe-Based Metal–Semiconductor–Metal Ultraviolet Photodetectors with Different Schottky Contacts

Physics of the Solid State (2024)

Vadim P. Sirkeli Oktay Yilmazoglu Ahid S. Hajo Natalia Nedeoglo D. D. Nedeoglo

Ultraviolet

Solid-state physics

10.1134/s1063783424601164

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Citations (0)

Optical Metamaterials: Qualitative Models

Springer series in optical sciences/SPringer series in optical sciences (2018)

A. Chipouline Franko Küppers

10.1007/978-3-319-77520-3

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Citations (2)

Linewidth of surface micro-machined MEMS tunable VCSELs at 1.5µm

Conference on Lasers and Electro-Optics (2012)

Christian Gierl–Mayer Tobias Gruendl Karolina Zogal Christian Grasse H. A. Davani

We demonstrate the linewidth characteristics of a micro-electro-mechanical system (MEMS) widely tunable VCSEL based on a newly developed surface micro-machining technology. The minimal linewidth is 98MHz at thermal rollover.

Laser linewidth

Vertical-cavity surface-emitting laser

10.1364/cleo_si.2012.ctu3n.2

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Citations (1)

High Speed Surface Micromachined MEMS Tunable VCSEL for Telecom Wavelengths

Sujoy Paul Christian Gierl–Mayer Julijan Cesar Quang Trung Le Mohammadreza Malekizandi

We report direct modulation of a widely tunable surface micromachined MEMS VCSEL. The MEMS is electro-thermally actuated for tuning the emission wavelength over 60 nm with a center wavelength of 1554 nm. Error-free transmission is achieved at 10 Gbit/s for 47 nm tuning range.

Vertical-cavity surface-emitting laser

10.1364/cleo_at.2015.am3k.1

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Citations (6)

Optical vortex propagation in few-mode rectangular polymer waveguides

Vladimir S. Lyubopytov A. Chipouline Urs Zywietz Boris N. Chichkov G. S. Sokolovskiĭ

We demonstrate that rectangular few-mode dielectric waveguides, fabricated with standard lithographic technique, can support on-chip propagation of optical vortices. We show that specific superpositions of waveguide eigenmodes form quasi-degenerate modes carrying light with high purity states of orbital angular momentum.

Optical vortex

Waveguide

Mode (computer interface)

10.1109/oecc.2017.8114912

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Citations (3)

Nonlinear Stable Pulses in Dispersion-Managed Fiber-Optic Systems with Substantial Losses

Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF) (2018)

Vladislav Neskorniuk Anton Lukashchuk Ildar R. Gabitov A. Chipouline Mohammadreza Malekizandi

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text V. Neskorniuk, A. Lukashchuk, I. Gabitov, A. Chipouline, M. Malekizandi, and F. Küppers, "Nonlinear Stable Pulses in Dispersion-Managed Fiber-Optic Systems with Substantial Losses," in Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF), OSA Technical Digest (online) (Optica Publishing Group, 2018), paper JTu5A.53. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

10.1364/bgppm.2018.jtu5a.53

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Citations (0)

New photocathodes for THz vacuum microelectronic devices

Oktay Yilmazoglu Shihab Al‐Daffaie Franko Küppers H. L. Hartnagel

Microelectronics

Source

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Experimental Investigation of Graphene Layers as 2D Nanoelectrode for Continuous Wave Terahertz Generation

2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) (2019)

Alaa Jabbar Jumaah Shihab Al‐Daffaie Oktay Yilmazoglu Franko Küppers Thomas Kusserow

The effect of using graphene as 2D nanoelectrode for continuous wave (CW) terahertz (THz) photomixers were investigated. The multilayer graphene (6-8 and 3-5 MLG) sheets were used as six-finger interdigital nanoelectrodes on a low- temperature-grown (LTG) GaAs photoconductor. The MLG nanoelectrode shows unique properties with high short-circuit current capabilities and reliable high photocurrents. The number of graphene layers play a big role on the electrical and the optical properties of graphene nanoelectrode. In one hand, a thinner graphene increases the transparency of the nanoelectrodes to improve the power conversion efficiency, and on the other hand, a thicker graphene is required to carry high current densities and enhance the photomixer performance.

10.1109/irmmw-thz.2019.8874024

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Citations (4)

Numerical analysis and system optimization for 100Gbit/s carrier Ethernet serial modulation formats

Optics Communications (2010)

Hacene Chaouch C. Gonschior K.-F. Klein S. Vorbeck M. Schneiders

Modulation (music)

10.1016/j.optcom.2010.01.054

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Citations (1)