Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Christoph Caspar"'
Autor:
Qian Hu, Karsten Schuh, Vahid Aref, Fred Buchali, Tobias Tannert, Markus Grözing, Manfred Berroth, Christian Schmidt, Jonathan Schostak, Christoph Caspar, Jung Han Choi, Volker Jungnickel, Ronald Freund
Publikováno v:
Optica Advanced Photonics Congress 2022.
We report on a SiGe analog multiplexer operating at 128-GSa/s, supporting generation of 63.36-GHz-broad DSCM-PCS-256QAM signal. We successfully achieve net information rate normalized per electrical lane of 2.85-bit/sym/lane back-to-back and 2.81-bit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0c5eb2106dcbf4e0d27885869734d44
https://doi.org/10.1364/sppcom.2022.spth1i.6
https://doi.org/10.1364/sppcom.2022.spth1i.6
Autor:
Tobias Tannert, Markus Grozing, Manfred Berroth, Christian Schmidt, Jung Han Choi, Christoph Caspar, Jonathan Schostak, Volker Jungnickel, Ronald Freund, Holger Rucker
Publikováno v:
2021 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b14c360b8a033e92030a9c1cc4f1c61
https://doi.org/10.1109/bcicts50416.2021.9682492
https://doi.org/10.1109/bcicts50416.2021.9682492
Autor:
Volker Jungnickel, Christoph Caspar, J.-R. Kropp, Ronald Freund, Nikolai N. Ledentsov, M. Agustin, Christoph Kottke
We present high-speed single-channel discrete multitone (DMT) operations of directly modulated 850-nm vertical-cavity surface-emitting lasers (VCSEL). Successful transmission of 135 Gb/s over 10 m of OM4 multi-mode fiber (MMF) and 114 Gb/s over 550 m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38c50b70111f257b11053d55f2666988
https://publica.fraunhofer.de/handle/publica/256483
https://publica.fraunhofer.de/handle/publica/256483
Autor:
Tobias Tannert, Ronald Freund, Manfred Berroth, Jung Han Choi, Xuan-Quang Du, Christoph Caspar, Volker Jungnickel, Markus Grozing, Christian Schmidt, Daniel Widmann
Publikováno v:
2017 IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM).
This paper presents a 2:1 Analog Multiplexer (AMUX) in a SiGe-HBT technology. The AMUX is used for time interleaving operation of two digital-to-analog converters (DACs) and therefore extends both the sampling rate and the bandwidth compared to a sin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fde14f7d3e9d2edef50ce1bf854eaeb
https://doi.org/10.1109/bctm.2017.8112931
https://doi.org/10.1109/bctm.2017.8112931
Autor:
Nikolay N. Ledentsov, M. Agustin, Christoph Kottke, Ronald Freund, Volker Jungnickel, Christoph Caspar
Publikováno v:
OFC
Scopus-Elsevier
Scopus-Elsevier
High speed single channel DMT operation of a directly modulated 850 nm VCSEL with 26 GHz bandwidth is presented. Successful transmission of 161, 152, 135 Gb/s over 10, 300, 550 m of OM4 MMF is demonstrated at the SD-FEC BER limit.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2a4c17088b0197550c6de02bbac2408
https://doi.org/10.1364/ofc.2017.w4i.7
https://doi.org/10.1364/ofc.2017.w4i.7
Publikováno v:
Journal of Lightwave Technology. 28:569-586
High-speed transmission in multimode fibers (MMF) is becoming attractive for the realization of high-capacity transmission systems at low cost. This paper discusses the theoretical background of MMF transmission and gives an overview on system charac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23291c75916c97f80db495d53ea273b0
https://doi.org/10.1109/jlt.2009.2030897
https://doi.org/10.1109/jlt.2009.2030897
Autor:
Nikolay N. Ledentsov, Jörg-R. Kropp, Vitaly A. Shchukin, Gunther Steinle, Jarek P. Turkiewicz, Bo Wu, Shaofeng Qiu, Yanan Ma, Zhiyong Feng, Sven Burger, Frank Schmidt, Christoph Caspar, Ronald Freund, Kent D. Choquette
Publikováno v:
SPIE Proceedings.
We address demands and challenges for GaAs–based Vertical–Cavity Surface–Emitting Lasers (VCSEL) in data communication. High speed modulation (~50Gb/s) at a high reliability can be realized with a proper VCSEL design providing a high differenti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f9154cf1f9a355121d14cda7eb558b5
https://doi.org/10.1117/12.2082951
https://doi.org/10.1117/12.2082951