Dr. Zan Shi Profile

Dr. Zan Shi

at Crystal Research Inc

SPIE Involvement:

Author

Publications (15)

Proceedings Article | 31 March 2005 Paper

An integrated 4-bit optical true-time-delay module for synthetic aperture radars

James Foshee, Suning Tang, X. Wang, Jennifer Colegrove, Yuanji Tang, Jibing Lin, Zan Shi

Proceedings Volume 5728, (2005) https://doi.org/10.1117/12.590721

KEYWORDS: Waveguides, Polymers, Liquid crystals, Fiber Bragg gratings, Polymer multimode waveguides, Integrated optics, Synthetic aperture radar, Switching, Phased array optics, Electro optics

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Proceedings Article | 14 June 2004 Paper

Switched optical polymeric waveguide true-time-delay lines for wideband photonics phased array antennas

James Foshee, Jennifer Colegrove, Yuanji Tang, Zan Shi, Xuping Zhang, Suning Tang

Proceedings Volume 5356, (2004) https://doi.org/10.1117/12.536262

KEYWORDS: Waveguides, Polymers, Liquid crystals, Phased array optics, Antennas, Polymer multimode waveguides, Fiber Bragg gratings, Phased arrays, Electro optics, Switching

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SPIE Journal Paper | 1 January 2003

Wavelength division multiplexers/demultiplexers for optical interconnects in massively parallel processing

Feng Zhao, Yun Zhang, Jizuo Zou, Zhong Shi, Bipin Bihari, Xuegong Deng, Jie Qiao, Zan Shi, Ray Chen

OE, Vol. 42, Issue 01, (January 2003) https://doi.org/10.1117/12.10.1117/1.1526470

KEYWORDS: Wavelength division multiplexing, Parallel processing, Optical interconnects, Signal attenuation, Diffraction gratings, Multiplexers, Optical design, Telecommunications, Channel projecting optics, Demultiplexers

Proceedings Article | 7 June 2002 Paper

Photonic applications in wireless terminal networks

Zan Shi, Jianyi Yang, Ray Chen, James Foshee

Proceedings Volume 4653, (2002) https://doi.org/10.1117/12.469652

KEYWORDS: Antennas, Phased array optics, Waveguides, Data communications, Interfaces, Phased arrays, Signal processing, Signal attenuation, Telecommunications, Modulation

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Proceedings Article | 27 December 2001 Paper

Photonics applications in high-capacity data link terminals

Zan Shi, James Foshee

Proceedings Volume 4490, (2001) https://doi.org/10.1117/12.455410

KEYWORDS: Antennas, Phased array optics, Waveguides, Photonics, Phased arrays, Interfaces, Optical signal processing, Radio optics, Data communications, Signal processing

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Radio systems and, in particular, RF data link systems are evolving toward progressively more bandwidth and higher data rates. For many military RF data link applications the data transfer requirements exceed one Gigabit per second. Airborne collectors need to transfer sensor information and other large data files to ground locations and other airborne terminals, including the rel time transfer of files. It is a challenge to the system designer to provide a system design, which meets the RF link budget requirements for a one Gigabit per second data link; and there is a corresponding challenge in the development of the terminal architecture and hardware. The utilization of photonic circuitry and devices as a part of the terminal design offers the designer some alternatives to the conventional RF hardware design within the radio. Areas of consideration for the implementation of photonic technology include Gigabit per second baseband data interfaces with fiber along with the associated clocking rates and extending these Gigabit data rates into the radio for optical processing technology; optical interconnections within the individual circuit boards in the radio; and optical backplanes to allow the transfer of not only the Gigabit per second data rates and high speed clocks but other RF signals within the radio. True time delay using photonics in phased array antennas has been demonstrated and is an alternative to the conventional phase shifter designs used in phased array antennas, and remoting of phased array antennas from the terminal electronics in the Ku and Ka frequency bands using fiber optics as the carrier to minimize the RF losses, negate the use of the conventional waveguides, and allow the terminal equipment to be located with other electronic equipment in the aircraft suitable for controlled environment, ready access, and maintenance. The various photonics design alternatives will be discussed including specific photonic design approaches. Packaging, performance, and affordability of the various design alternatives will also be discussed.

Proceedings Article | 11 October 2001 Paper

Remoting alternatives for a multiple phased-array antenna network

Zan Shi, James Foshee

Proceedings Volume 4604, (2001) https://doi.org/10.1117/12.444617

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Significant improvements in technology have made phased array antennas an attractive alternative to the traditional dish antenna for use on wide body airplanes. These improvements have resulted in reduced size, reduced cost, reduced losses in the transmit and receive channels (simplifying the design), a significant extension in the bandwidth capability, and an increase in the functional capability. Flush mounting (thus reduced drag) and rapid beam switching are among the evolving desirable features of phased array antennas. Beam scanning of phased array antennas is limited to +/-45 degrees at best and therefore multiple phased array antennas would need to be used to insure instantaneous communications with any ground station (stations located at different geographical locations on the ground) and with other airborne stations. The exact number of phased array antennas and the specific installation location of each antenna on the wide body airplane would need to be determined by the specific communication requirements, but it is conceivable as many as five phased array antennas may need to be used to provide the required coverage. Control and switching of these antennas would need to be accomplished at a centralized location on the airplane and since these antennas would be at different locations on the airplane an efficient scheme of remoting would need to be used. To save in cost and keep the phased array antennas as small as possible the design of the phased array antennas would need to be kept simple. A dish antenna and a blade antenna (small size) could also be used to augment the system. Generating the RF signals at the central location and then using RF cables or waveguide to get the signal to any given antenna could result in significant RF losses. This paper will evaluate a number of remoting alternatives to keep the system design simple, reduce system cost, and utilize the functional capability of networking multiple phased array antennas on a wide body airplane. Included in these alternatives will be the use of optical modules as the true time delay in the phased array antennas and using a fiber optic bus from the centralized control to drive the optical modules.

SPIE Journal Paper | 1 July 2001

Photonics for time delay in communication systems

Zan Shi, Jianyi Yang, James Foshee, Walter Hartman, Suning Tang, Ray Chen

OE, Vol. 40, Issue 07, (July 2001) https://doi.org/10.1117/12.10.1117/1.1372704

Proceedings Article | 30 May 2001 Paper

Photonics for time delay in communication systems

Zan Shi, James Foshee, Jianyi Yang, Suning Tang, Walter Hartman, Ray Chen

Proceedings Volume 4292, (2001) https://doi.org/10.1117/12.428036

KEYWORDS: Telecommunications, Satellites, Antennas, Waveguides, Satellite communications, Photonics, Phased array optics, Optical design, Modulation, Signal processing

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Proceedings Article | 9 October 2000 Paper

Polymeric waveguide circuits for true time delay (TTD) in phased array antennas

James Foshee, Suning Tang, Zan Shi, Ray Chen

Proceedings Volume 4225, (2000) https://doi.org/10.1117/12.402677

KEYWORDS: Waveguides, Polymers, Polymer multimode waveguides, Antennas, Phased array optics, Phased arrays, Photodetectors, Microwave radiation, Sensors, Wave propagation

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Proceedings Article | 27 April 2000 Paper

Optical true-time-delay lines using polyimide-based waveguides for wideband phased-array antennas

Zan Shi, Dechang An, Nianhua Jiang, John Taboada, Lin Sun, Bing Li, Victor Villavicencio, Greg Morning, Suning Tang, Ray Chen

Proceedings Volume 3952, (2000) https://doi.org/10.1117/12.384399

KEYWORDS: Waveguides, Antennas, Polymers, Semiconducting wafers, Phased array optics, Phased arrays, Cladding, Coating, Beam steering, Photomasks

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Proceedings Article | 27 April 2000 Paper

Fabrication and testing of polyimide thermo-optic switches

John Taboada, Dechang An, Zan Shi, Jeffery Maki, Suning Tang, Ray Chen

Proceedings Volume 3952, (2000) https://doi.org/10.1117/12.384402

KEYWORDS: Switches, Electrodes, Thermal optics, Semiconducting wafers, Polymers, Optical fabrication, Waveguides, Objectives, Fabrication, Silicon

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Proceedings Article | 27 April 2000 Paper

Switching characteristic of wideband MSM and PIN photodetectors for photonic phased-array antennas

Bing Li, Suning Tang, Nianhua Jiang, Zan Shi, Ray Chen

Proceedings Volume 3952, (2000) https://doi.org/10.1117/12.384390

KEYWORDS: Photodetectors, Switching, PIN photodiodes, Switches, Antennas, Phased array optics, Sensors, Waveguides, Signal detection, Phased arrays

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Proceedings Article | 19 April 2000 Paper

1x2 Y-fed directional coupler modulator based on electro-optic polymer

Dechang An, Suning Tang, Zan Shi, Lin Sun, John Taboada, Qingjun Zhou, Xuejun Lu, Ray Chen, Hua Zhang, William Steier, Albert Ren, Larry Dalton

Proceedings Volume 3950, (2000) https://doi.org/10.1117/12.382150

KEYWORDS: Modulators, Polymers, Waveguides, Electro optic polymers, Modulation, Directional couplers, Electrodes, Switching, Polymer multimode waveguides, Polyurethane

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SPIE Journal Paper | 1 March 2000

Highly efficient linear waveguide modulator based on domain-inverted electro-optic polymers

Suning Tang, Zan Shi, Dechang An, Lin Sun, Ray Chen

OE, Vol. 39, Issue 03, (March 2000) https://doi.org/10.1117/12.10.1117/1.602414

KEYWORDS: Modulators, Modulation, Waveguides, Polymers, Electrodes, Directional couplers, Intermodulation, Switching, Electro optic polymers, Analog electronics

Proceedings Article | 13 April 1999 Paper

High-speed traveling-wave electrodes for polymeric electro-optic modulators

Zhong Han, Suning Tang, Dechang An, Lin Sun, Xuejun Lu, Zan Shi, Qingjun Zhou, Ray Chen

Proceedings Volume 3632, (1999) https://doi.org/10.1117/12.344624

KEYWORDS: Electrodes, Photoresist materials, Gold, Plating, Electroplating, Polymers, Microwave radiation, Metals, Chromium, Electro optic polymers

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Showing 5 of 15 publications

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