Mr. Robert B. Welstand Profile

Robert B. Welstand

Researcher/PhD student at Univ of California San Diego

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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

Proc. SPIE. 3463, Photonics and Radio Frequency II

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

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

Proc. SPIE. 3547, Semiconductor Lasers III

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

Proc. SPIE. 3160, Optical Technology for Microwave Applications VIII

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

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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

Proc. SPIE. 3075, Photonic Processing Technology and Applications

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

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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

Proc. SPIE. 2844, Photonics and Radio Frequency

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

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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

Proc. SPIE. 2844, Photonics and Radio Frequency

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

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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

Proc. SPIE. 2560, Optical Technology for Microwave Applications VII

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

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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

Proc. SPIE. 2149, Technologies for Optical Fiber Communications

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

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Showing 5 of 8 publications

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