Dr. Ralph H. Johnson Profile

Dr. Ralph H. Johnson

Senior Engineering Fellow

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Author

Publications (11)

Proceedings Article | 13 March 2013 Paper

The range of VCSEL wearout reliability acceleration behavior and its effects on applications

James Guenter, Luke Graham, Bobby Hawkins, Robert Hawthorne, Ralph Johnson, Gary Landry, Jim Tatum

Proceedings Volume 8639, 86390I (2013) https://doi.org/10.1117/12.2002840

KEYWORDS: Reliability, Vertical cavity surface emitting lasers, Indium gallium arsenide, Quantum wells, Gallium arsenide, Instrument modeling, Indium, Manufacturing, Ions, Electroluminescence

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Proceedings Article | 7 February 2012 Paper

The next generation of high speed VCSELs at Finisar

Luke Graham, Hao Chen, Deepa Gazula, Timo Gray, James Guenter, Bobby Hawkins, Ralph Johnson, Chris Kocot, Andrew MacInnes, Gary Landry, Jim Tatum

Proceedings Volume 8276, 827602 (2012) https://doi.org/10.1117/12.910505

KEYWORDS: Vertical cavity surface emitting lasers, Reliability, Standards development, Eye, Data communications, Internet, Semiconducting wafers, Transceivers, Resistance, Radio over Fiber

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Proceedings Article | 27 April 2010 Paper

High data throughput VCSELs

J. Tatum, R. Johnson, J. Guenter, D. Gazula, G. Park, A. MacInnes

Proceedings Volume 7720, 772004 (2010) https://doi.org/10.1117/12.854813

KEYWORDS: Vertical cavity surface emitting lasers, Reliability, Transceivers, Failure analysis, Semiconducting wafers, Data communications, Networks, Optics manufacturing, Data centers, Optical interconnects

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Proceedings Article | 6 February 2010 Paper

Emerging VCSEL technologies at Finisar

D. Gazula, J. Guenter, R. Johnson, G. Landry, A. MacInnes, G. Park, J. K. Wade, J. R. Biard, J. Tatum

Proceedings Volume 7615, 761506 (2010) https://doi.org/10.1117/12.841012

KEYWORDS: Vertical cavity surface emitting lasers, Modulation, Reliability, Temperature metrology, Standards development, Transceivers, Receivers, Capacitance, Photodiodes, Space operations

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Proceedings Article | 7 February 2009 Paper

More VCSELs at Finisar

James Guenter, Bobby Hawkins, Robert Hawthorne, Ralph Johnson, Gary Landry, Kent Wade

Proceedings Volume 7229, 722905 (2009) https://doi.org/10.1117/12.816809

KEYWORDS: Vertical cavity surface emitting lasers, Quantum wells, Reliability, Oxides, Gallium arsenide, Resistance, Indium gallium arsenide, Mirrors, Humidity, Radio over Fiber

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Proceedings Article | 14 March 2005 Paper

A plot twist: the continuing story of VCSELs at AOC

James Guenter, Jim Tatum, Robert Hawthorne, Ralph Johnson, David Mathes, Bobby Hawkins

Proceedings Volume 5737, (2005) https://doi.org/10.1117/12.601831

KEYWORDS: Vertical cavity surface emitting lasers, Reliability, Oxides, Failure analysis, Manufacturing, Laser damage threshold, Code division multiplexing, Radio over Fiber, Eye, Mirrors

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Proceedings Article | 17 June 2003 Paper

Long-wavelength VCSELs at Honeywell

Ralph Johnson, Virgil Blasingame, Jim Tatum, Bo-Su Chen, David Mathes, James Orenstein, Tzu-Yu Wang, Jin Kim, Ho-Ki Kwon, Jae-Hyun Ryou, Gyoungwon Park, Edith Kalweit, Helen Chanhvongsak, Mike Ringle, Terry Marta, Joe Gieske

Proceedings Volume 4994, (2003) https://doi.org/10.1117/12.488221

KEYWORDS: Vertical cavity surface emitting lasers, Quantum wells, Mirrors, Metalorganic chemical vapor deposition, Nitrogen, Aluminum, Gallium arsenide, Absorption, Semiconductors, Resistance

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Proceedings Article | 4 June 2002 Paper

Beyond 850 nm: progress at other wavelengths and implications from the standard

Jim Tatum, Mary Hibbs-Brenner, J. Robert Biard, Andrew Clark, J. Allen Cox, James Guenter, Robert Hawthorne, Klein Johnson, Ralph Johnson, J. Kim, Yue Liu, Fouad Nusseibeh, Gyoungwon Park

Proceedings Volume 4649, (2002) https://doi.org/10.1117/12.469216

KEYWORDS: Vertical cavity surface emitting lasers, Reliability, Optics manufacturing, Standards development, Control systems, Manufacturing, Dielectrics, Packaging, Optical networks, Data communications

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Proceedings Article | 4 May 2001 Paper

Commercialization of Honeywell's VCSEL technology: further developments

James Guenter, Jim Tatum, Andrew Clark, R. Scott Penner, Ralph Johnson, Robert Hawthorne, J. Robert Biard, Yue Liu

Proceedings Volume 4286, (2001) https://doi.org/10.1117/12.424790

KEYWORDS: Vertical cavity surface emitting lasers, Reliability, Data modeling, Oxides, Semiconducting wafers, Manufacturing, Capacitance, Sensors, Data communications, Modulation

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Proceedings Article | 1 May 2000 Paper

Commercialization of Honeywell's VCSEL technology

Jim Tatum, Andrew Clark, James Guenter, Robert Hawthorne, Ralph Johnson

Proceedings Volume 3946, (2000) https://doi.org/10.1117/12.384359

KEYWORDS: Vertical cavity surface emitting lasers, Semiconducting wafers, Reliability, Manufacturing, Failure analysis, Data communications, Picosecond phenomena, Control systems, Resistance, Eye

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Proceedings Article | 1 May 1997 Paper

High-speed characteristics of VCSELs

Jim Tatum, David Smith, James Guenter, Ralph Johnson

Proceedings Volume 3004, (1997) https://doi.org/10.1117/12.273829

KEYWORDS: Vertical cavity surface emitting lasers, Polarization, Polarizers, Signal to noise ratio, Near field optics, Charged particle optics, Circuit switching, Modulation, Signal attenuation, Resistance

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Showing 5 of 11 publications

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