Mr. Philip Wolf Profile

Philip Wolf

at Technische Univ Berlin

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 9 November 2016 Paper

Recent progress in 1.3- and 1.5-um waveband wafer-fused VCSELs

A. Mereuta, A. Caliman, A. Sirbu, V. Iakovlev, D. Ellafi, A. Rudra, P. Wolf, D. Bimberg, E. Kapon

Proceedings Volume 10017, 1001702 (2016) https://doi.org/10.1117/12.2246208

KEYWORDS: Vertical cavity surface emitting lasers, Quantum wells, Semiconducting wafers, Modulation, Temperature metrology, Single mode fibers, Eye, Data transmission, Coarse wavelength division multiplexing, Reflectivity

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Proceedings Article | 4 March 2015 Paper

Extraction and analysis of high-frequency response and impedance of 980-nm VCSELs as a function of temperature and oxide aperture diameter

Philip Wolf, Hui Li, Philip Moser, Gunter Larisch, James Lott, Dieter Bimberg

Proceedings Volume 9381, 93810H (2015) https://doi.org/10.1117/12.2077182

KEYWORDS: Vertical cavity surface emitting lasers, Temperature metrology, Oxides, Capacitance, Resistance, Modulation, Quantum wells, Data transmission, Optical interconnects, Data modeling

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Proceedings Article | 2 May 2014 Paper

Green nanophotonics for future datacom and Ethernet networks

Dieter Bimberg, Dejan Arsenijević, Gunter Larisch, Hui Li, James Lott, Philip Moser, Holger Schmeckebier, Philip Wolf

Proceedings Volume 9134, 913402 (2014) https://doi.org/10.1117/12.2053027

KEYWORDS: Vertical cavity surface emitting lasers, Mode locking, Internet, Optical interconnects, Modulation, Nanophotonics, Picosecond phenomena, Data centers, Data communications, Oxides

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Proceedings Article | 27 February 2014 Paper

Energy-efficient oxide-confined high-speed VCSELs for optical interconnects

Philip Moser, Philip Wolf, Gunter Larisch, Hui Li, James Lott, Dieter Bimberg

Proceedings Volume 9001, 900103 (2014) https://doi.org/10.1117/12.2044319

KEYWORDS: Vertical cavity surface emitting lasers, Oxides, Modulation, Optical interconnects, Wind energy, Multimode fibers, Optical fibers, Data transmission, Temperature metrology, Data centers

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Proceedings Article | 27 February 2014 Paper

Energy efficiency, bit rate, and modal properties of 980 nm VCSELs for very-short-reach optical interconnects

Hui Li, Philip Moser, Philip Wolf, Gunter Larisch, Leszek Frasunkiewicz, Maciej Dems, Tomasz Czyszanowski, James Lott, Dieter Bimberg

Proceedings Volume 9001, 90010B (2014) https://doi.org/10.1117/12.2045780

KEYWORDS: Vertical cavity surface emitting lasers, Oxides, Energy efficiency, Optical interconnects, Data transmission, Quantum wells, Temperature metrology, Gallium arsenide, Refractive index

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Proceedings Article | 13 March 2013 Paper

Impact of the aperture diameter on the energy efficiency of oxide-confined 850 nm high speed VCSELs

Philip Moser, James Lott, Philip Wolf, Gunter Larisch, Hui Li, Nikolay Ledentsov, Dieter Bimberg

Proceedings Volume 8639, 86390V (2013) https://doi.org/10.1117/12.2002446

KEYWORDS: Vertical cavity surface emitting lasers, Oxides, Modulation, Quantum efficiency, Energy efficiency, Data transmission, Resistance, Optical interconnects, Quantum information, Computing systems

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Proceedings Article | 29 November 2012 Paper

VCSELs for exascale computing, computer farms, and green photonics

Werner Hofmann, Philip Moser, Philip Wolf, Gunter Larisch, Hui Li, Wei Li, James Lott, Dieter Bimberg

Proceedings Volume 8552, 855205 (2012) https://doi.org/10.1117/12.2006273

KEYWORDS: Vertical cavity surface emitting lasers, Optical interconnects, Data centers, Energy efficiency, Semiconductor lasers, Computing systems, Computer security, Photonics, Metals, Data communications

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The bandwidth-induced communication bottleneck due to the intrinsic limitations of metal interconnects is inhibiting the performance and environmental friendliness of today´s supercomputers, data centers, and in fact all other modern electrically interconnected and interoperable networks such as data farms and "cloud" fabrics. The same is true for systems of optical interconnects (OIs), where even when the metal interconnects are replaced with OIs the systems remain limited by bandwidth, physical size, and most critically the power consumption and lifecycle operating costs. Vertical-cavity surface-emitting lasers (VCSELs) are ideally suited to solve this dilemma. Global communication providers like Google Inc., Intel Inc., HP Inc., and IBM Inc. are now producing optical interconnects based on VCSELs. The optimal bandwidth per link may be analyzed by by using Amdahl´s Law and depends on the architecture of the data center and the performance of the servers within the data center. According to Google Inc., a bandwidth of 40 Gb/s has to be accommodated in the future. IBM Inc. demands 80 Tbps interconnects between solitary server chips in 2020. We recently realized ultrahigh bit rate VCSELs up to 49 Gb/s suited for such optical interconnects emitting at 980 nm. These devices show error-free transmission at temperatures up to 155°C and operate beyond 200°C. Single channel data-rates of 40 Gb/s were achieved up to 75°C. Record high energy efficiencies close to 50 fJ/bit were demonstrated for VCSELs emitting at 850 nm. Our devices are fabricated using a full three-inch wafer process, and the apertures were formed by in-situ controlled selective wet oxidation using stainless steel-based vacuum equipment of our own design. assembly, and operation. All device data are measured, recorded, and evaluated by our proprietary fully automated wafer mapping probe station. The bandwidth density of our present devices is expected to be scalable from about 100 Gbps/mm² to a physical limit of roughly 15 Tbps/mm² based on the current 12.5 Gb/s VCSEL technology. Still more energy-efficient and smaller volume laser diode devices dissipating less heat are mandatory for further up scaling of the bandwidth. Novel metal-clad VCSELs enable a reduction of the device's footprint for potentially ultrashort range interconnects by 1 to 2 orders of magnitude compared to conventional VCSELs thus enabling a similar increase of device density and bandwidth.

Proceedings Article | 9 May 2012 Paper

High-speed VCSELs for energy efficient computer interconnects

Philip Moser, Philip Wolf, James Lott, Gunter Larisch, Alexey Payusov, Alex Mutig, Waldemar Unrau, Nikolay Ledentsov, Werner Hofmann, Dieter Bimberg

Proceedings Volume 8432, 843202 (2012) https://doi.org/10.1117/12.923054

KEYWORDS: Vertical cavity surface emitting lasers, Optical interconnects, Modulation, Multimode fibers, Optical fibers, Temperature metrology, Data transmission, Data centers, Binary data, Standards development

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Proceedings Article | 7 February 2012 Paper

980-nm VCSELs for optical interconnects at bandwidths beyond 40 Gb/s

W. Hofmann, P. Moser, P. Wolf, G. Larisch, W. Unrau, D. Bimberg

Proceedings Volume 8276, 827605 (2012) https://doi.org/10.1117/12.908466

KEYWORDS: Vertical cavity surface emitting lasers, Optical interconnects, Modulation, Receivers, Mirrors, Binary data, Semiconducting wafers, Photonics, Gallium arsenide, Temperature metrology

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Proceedings Article | 7 February 2012 Paper

Energy-efficient vertical-cavity surface-emitting lasers (VCSELs) for "green" data and computer communication

Philip Moser, James Lott, Philip Wolf, Gunter Larisch, Alexey Payusov, Gerrit Fiol, Nikolay Ledentsov, Werner Hofmann, Dieter Bimberg

Proceedings Volume 8276, 82760J (2012) https://doi.org/10.1117/12.906856

KEYWORDS: Vertical cavity surface emitting lasers, Modulation, Data transmission, Multimode fibers, Optical fibers, Data communications, Optical interconnects, Temperature metrology, Energy efficiency, Semiconducting wafers

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Proceedings Article | 28 November 2011 Paper

High-speed 850 and 980 nm VCSELs for high-performance computing applications

Alex Mutig, Philip Moser, James Lott, Philip Wolf, Werner Hofmann, Nikolay Ledentsov, Dieter Bimberg

Proceedings Volume 8308, 830818 (2011) https://doi.org/10.1117/12.903698

KEYWORDS: Vertical cavity surface emitting lasers, Optical interconnects, Data transmission, Oxides, Quantum wells, Multimode fibers, Light sources, Gallium arsenide, Binary data, Temperature metrology

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Proceedings Article | 8 February 2011 Paper

High-speed highly temperature stable 980 nm VCSELs operating at 25 Gb/s at up to 85 °C for short reach optical interconnects

Alex Mutig, James Lott, Sergey Blokhin, Philip Moser, Philip Wolf, Werner Hofmann, Alexey Nadtochiy, Dieter Bimberg

Proceedings Volume 7952, 79520H (2011) https://doi.org/10.1117/12.876156

KEYWORDS: Vertical cavity surface emitting lasers, Oxides, Modulation, Temperature metrology, Optical interconnects, Quantum wells, Laser stabilization, Signal processing, Eye, Data transmission

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Showing 5 of 12 publications

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