Mr. Robert B. Welstand Profile

Robert B. Welstand

Researcher/PhD student at Univ of California San Diego

SPIE Involvement:

Author

Publications (8)

Proceedings Article | 3 November 1998 Paper

Design for a high-dynamic-range electroabsorption waveguide modulator

Robert Welstand, Wei-Xi Chen, J. Zhu, Paul Yu, Chen Sun, Stephen Pappert, Richard Nguyen, Yet Zen Liu

Proceedings Volume 3463, (1998) https://doi.org/10.1117/12.330391

KEYWORDS: Modulators, Absorption, Waveguides, Quantum wells, Modulation, Mathematical modeling, Calibration, Polarization, Intermodulation, Temperature metrology

Proceedings Article | 19 August 1998 Paper

Laser/modulator module for analog fiber optic links

Paul Yu, J. Zhu, Wei-Xi Chen, Guoliang Li, Robert Welstand, Stephen Pappert, Chen Sun, Richard Nguyen, Yet Zen Liu

Proceedings Volume 3547, (1998) https://doi.org/10.1117/12.319631

KEYWORDS: Modulators, Analog electronics, Fiber lasers, Fiber optics, Transmitters, Extremely high frequency, Waveguides, Laser applications, Antennas, Microwave radiation

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Proceedings Article | 23 October 1997 Paper

Planar photoelastic effect for rf photonics system

Qizhi Liu, Wei-Xi Chen, Robert Welstand, Z. Guan, Q. Xing, Hao Jiang, Stephen Pappert, Hans Zappe, S. Lau, Paul Yu

Proceedings Volume 3160, (1997) https://doi.org/10.1117/12.283937

KEYWORDS: Photoelasticity, Waveguides, Laser vision correction, Semiconductor lasers, RF photonics, Monochromatic aberrations, Modulators, Phased array optics, Ion implantation, Continuous wave operation

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Proceedings Article | 1 July 1997 Paper

Dual function electroabsorption waveguide modulator/detector for photonic rf signal processing

Robert Welstand, Stephen Pappert, Chen Sun, Hao Jiang, Guoliang Li, Wei-Xi Chen, J. Zhu, Yet Zen Liu, Paul Yu

Proceedings Volume 3075, (1997) https://doi.org/10.1117/12.277627

KEYWORDS: Waveguides, Modulators, Sensors, Antennas, Signal detection, Transceivers, Absorption, Distortion, Signal processing, Diodes

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Proceedings Article | 22 November 1996 Paper

Novel planar electroabsorption waveguide modulator for rf applications

Qizhi Liu, Robert Welstand, Richard Orazi, Stephen Pappert, Paul Yu, S. Lau

Proceedings Volume 2844, (1996) https://doi.org/10.1117/12.259023

KEYWORDS: Modulators, Waveguides, Planar waveguides, Photoelasticity, Ion implantation, Capacitance, Helium, Near field optics, Signal attenuation, Thin film devices

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Proceedings Article | 22 November 1996 Paper

Phase noise and dynamic range of analog fiber links using electroabsorption modulators

Robert Welstand, Richard Orazi, Chen Sun, Hemonth Rao, Yet Zen Liu, Stephen Pappert, Paul Yu

Proceedings Volume 2844, (1996) https://doi.org/10.1117/12.259024

KEYWORDS: Modulators, Phase shift keying, Fiber couplers, Waveguides, Phase measurement, Interference (communication), Fiber optics tests, Fiber optics, Amplitude modulation, Modulation

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Proceedings Article | 1 October 1995 Paper

High dynamic range in electroabsorption modulator for analog links

Robert Welstand, Chen Sun, Yet Zen Liu, Stephen Pappert, J. Zhu, Jin Chen, Paul Yu

Proceedings Volume 2560, (1995) https://doi.org/10.1117/12.218532

KEYWORDS: Modulators, Intermodulation, Waveguides, Sensors, Distortion, Signal detection, High dynamic range imaging, Analog electronics, Modulation, Polarization

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Proceedings Article | 2 May 1994 Paper

Strained-layer InAsP/InGaP MQWs grown by MOVPE

Paul Yu, M. Markarian, Robert Welstand, X. Jiang, Arthur Clawson, S. Lau

Proceedings Volume 2149, (1994) https://doi.org/10.1117/12.175287

KEYWORDS: Superlattices, Luminescence, Quantum wells, Indium gallium phosphide, Satellites, Absorption, X-rays, Optoelectronics, PIN photodiodes, Excitons

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Showing 5 of 8 publications

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