Dr. Julian P. Bristow Profile

Dr. Julian P. Bristow

Director at Honeywell Aerospace

SPIE Involvement:

Author

Publications (27)

Proceedings Article | 13 April 1999 Paper

Progress in short-distance (0.5 m to 100 m) optical interconnects

John Lehman, Julian Bristow, Yue Liu, Mary Hibbs-Brenner

Proceedings Volume 3632, (1999) https://doi.org/10.1117/12.344593

KEYWORDS: Optical interconnects, Connectors, Interfaces, Switches, Copper, Transceivers, Optoelectronics, Vertical cavity surface emitting lasers, Computing systems, Clocks

Read Abstract +

Proceedings Article | 17 October 1997 Paper

Radiation-induced effects research in emerging photonic technologies: vertical cavity surface emitting lasers, GaN light-emitting diodes, and microelectromechanical devices

Edward Taylor, Alan Paxton, Harald Schone, John Comtois, Anthony Sanchez, M. Adrian Michalicek, James Winter, Stanley McKinney, Marek Osinski, Piotr Perlin, Richard Carson, Julian Bristow, John Lehman, Mary Hibbs-Brenner

Proceedings Volume 3124, (1997) https://doi.org/10.1117/12.283879

KEYWORDS: Vertical cavity surface emitting lasers, Ions, Radiation effects, Light emitting diodes, Actuators, Microelectromechanical systems, Gallium nitride, Gamma radiation, Oxides, Mirrors

Read Abstract +

Proceedings Article | 29 July 1997 Paper

Advancement of photonic interconnects for spaceborne systems

Julian P. G. Bristow, John Lehman, Robert Morgan, John DeRuiter

Proceedings Volume 10288, 1028809 (1997) https://doi.org/10.1117/12.278762

KEYWORDS: Optical interconnects, Packaging, Vertical cavity surface emitting lasers, Electromagnetic coupling, Fiber optics, Clocks, Sensors, Connectors, Optoelectronic devices, Optoelectronics

Read Abstract +

Proceedings Article | 29 July 1997 Paper

Polyimide-based waveguides for guided-wave multi-Gbit/sec MCM optoelectronic interconnects

Ray Chen, Linghui Wu, Feiming Li, Suning Tang, Michael Dubinovsky, J. Qi, Clint Schow, Joe Campbell, Randy Wickman, Bruce Pecor, Mary Hibbs-Brenner, Julian Bristow, Yung-Sheng Liu, Scott Rattan, Chad Noddings

Proceedings Volume 10290, 102900M (1997) https://doi.org/10.1117/12.279830

KEYWORDS: Waveguides, Optoelectronics, Signal processing, Vertical cavity surface emitting lasers, Optical clocks, Signal attenuation, Computing systems, Signal detection, Sensors, Silicon

Read Abstract +

We present the fabrication of polyimide-based H-tree waveguides for a multi-GBit/sec optical clock signal distribution in a Si CMOS process compatible environment. Such a clock distribution system is to replace the existing electronic counterpart associated with high-performance computers. A waveguide propagation loss of 0.21 dB/cm at 850 nm was experimentally confirmed for the l-to-48 waveguide fanout device, l-to-2 splitting loss and bending loss were measured to be 0.25 dB and higher. The planarization requirement of the optical interconnection layer among many electrical interconnection layers makes the employment of tilted grating a choice of desire. Theoretical calculation predicts the 1-to-l free-space to waveguide coupling with an efficiency as high as 95%. Currently, a coupling efficiency of 35% was experimentally confirmed due to the limited index difference between guiding and cladding layers. Further experiments aimed at structuring a larger guiding/cladding layer index differences are under investigation. To effectively couple an optical signal into the waveguide through the tided grating coupler, the accuracy of the wavelength employed is pivotal. This makes the usage of the vertical cavity surface-emitting lasers (VCSELs) and VCSEL arrays the best choice when compared with edge-emitting lasers. Modulation bandwidth as high as 6 GBit/sec was demonstrated at 850 nm. Such a wavelength is compatible with Si-based photodetectors. Temperature dependence of the threshold current up to 155 °C was measured which will determine the power dissipation issue of the optoelectronic packaging. Finally, the first fully monolithic Si-MOSFET integrated receiver was made as the optical clock signal detector. To further enhance the bandwidth of such a detector, a resonant cavity structure with Si/Si02 as the bottom mirror was employed. The measured demodulation bandwidth is over 10 GHz. A fully integrated guided-wave optical clock signal distribution system having planarized grating couplers, H-tree Si- CMOS process compatible waveguides, VCSELs and Si-based photo-receivers will be demonstrated in the near future.

Proceedings Article | 1 May 1997 Paper

Vertical-cavity surface-emitting lasers: the applications

Robert Morgan, John Lehman, Mary Hibbs-Brenner, Yue Liu, Julian Bristow

Proceedings Volume 3004, (1997) https://doi.org/10.1117/12.273822

KEYWORDS: Vertical cavity surface emitting lasers, Packaging, Waveguides, Polymers, Polymer multimode waveguides, Light emitting diodes, Data communications, Sensors, Computing systems, Optical fibers

Read Abstract +

Proceedings Article | 4 April 1997 Paper

Optoelectronic backplane interconnect technology development (POINT)

Yung-Sheng Liu, W. Hennessy, R. Wojnarowski, Julian Bristow, Yue Liu, John Rowlette, Jared Stack, James Yardley, Louay Eldada, Richard Osgood, Robert Scarmozzino, Shin Lee, Susant Patra

Proceedings Volume 3005, (1997) https://doi.org/10.1117/12.271090

KEYWORDS: Waveguides, Packaging, Polymers, Optoelectronic packaging, Vertical cavity surface emitting lasers, Optical alignment, Polymer multimode waveguides, Transmitters, Optical interconnects, Optoelectronics

Read Abstract +

Proceedings Article | 4 April 1997 Paper

Recent progress in short-distance optical interconnects

Julian Bristow, John Lehman, Yue Liu, Mary Hibbs-Brenner, Lynn Galarneau, Robert Morgan

Proceedings Volume 3005, (1997) https://doi.org/10.1117/12.271078

KEYWORDS: Waveguides, Polymers, Optical interconnects, Polymer multimode waveguides, Vertical cavity surface emitting lasers, Connectors, Interfaces, System integration, Wave propagation, Integrated optics

Read Abstract +

Proceedings Article | 4 April 1997 Paper

Design and fabrication of passive optical polymer waveguide components for multimode parallel optical links

Robert Scarmozzino, Richard Osgood, Louay Eldada, James Yardley, Yue Liu, Julian Bristow, Jared Stack, John Rowlette, Yung-Sheng Liu

Proceedings Volume 3005, (1997) https://doi.org/10.1117/12.271094

KEYWORDS: Waveguides, Polymer multimode waveguides, Polymers, Computer aided design, Beam propagation method, Signal attenuation, Optical interconnects, Optical fibers, Laser sources, Chlorine

Read Abstract +

Proceedings Article | 18 October 1996 Paper

Vertical cavity surface emitting lasers for spaceborne photonic interconnects

Robert Morgan, Julian Bristow, Mary Hibbs-Brenner, Jim Nohava, Sommy Bounnak, Terry Marta, John Lehman, Yue Liu

Proceedings Volume 2811, (1996) https://doi.org/10.1117/12.254041

KEYWORDS: Vertical cavity surface emitting lasers, Optical interconnects, Waveguides, Packaging, Polymer multimode waveguides, Polymers, Light emitting diodes, Optoelectronic devices, Radiation effects, Optical fibers

Read Abstract +

Proceedings Article | 30 September 1996 Paper

Polymer optical waveguide technology for multichip modules (MCMs) and board level interconnects

Yue Liu, Julian Bristow, Klein Johnson, Andrzej Peczalski, Terry Marta, Sommy Bounnak, W. Goldberg, Brian Hanzel

Proceedings Volume 2891, (1996) https://doi.org/10.1117/12.253163

KEYWORDS: Waveguides, Polymer multimode waveguides, Polymers, Vertical cavity surface emitting lasers, Connectors, Silicon, Optical interconnects, Optoelectronic devices, Interfaces, Photodetectors

Read Abstract +

Proceedings Article | 29 March 1996 Paper

MCM board level optical interconnects using passive polymer waveguides with hybrid optical and electrical multichip module packaging

Julian Bristow, Yue Liu, Terry Marta, Klein Johnson, Brian Hanzal, Andrzej Peczalski, Sommy Bounnak, Yung-Sheng Liu, Herbert Cole

Proceedings Volume 2691, (1996) https://doi.org/10.1117/12.236922

KEYWORDS: Waveguides, Packaging, Polymers, Polymer multimode waveguides, Optical interconnects, Vertical cavity surface emitting lasers, Interfaces, Optoelectronic devices, Optoelectronics, Cladding

Read Abstract +

Proceedings Article | 30 January 1996 Paper

Polymer optical interconnect technology (POINT): optoelectronic packaging and interconnect for board and backplane applications

Y. S. Liu, R. Wojnarowski, W. Hennessy, Julian P. Bristow, Yue Liu, Andrzej Peczalski, John Rowlette, Alan Plotts, Jared Stack, James Yardley, Louay Eldada, Richard Osgood, Robert Scarmozzino, Sing Lee, Volkan Ozguz

Proceedings Volume 10284, 102840N (1996) https://doi.org/10.1117/12.229274

KEYWORDS: Polymers, Optical interconnects, Optoelectronic packaging, Optoelectronics, Packaging, Diffractive optical elements, Amplifiers, Vertical cavity surface emitting lasers, Optical alignment, Computer simulations

Read Abstract +

Proceedings Article | 30 January 1996 Paper

Intracomputer optical interconnects: progress and challenges

Julian Bristow

Proceedings Volume 10284, 102840H (1996) https://doi.org/10.1117/12.229268

KEYWORDS: Optical interconnects, Packaging, Connectors, Clocks, Optoelectronics, Interfaces, Receivers, Optics manufacturing, Optoelectronic devices, Polymers

Read Abstract +

Proceedings Article | 1 October 1995 Paper

Optical microwave cellular systems for plant automation

Julian Bristow, Donald Singh

Proceedings Volume 2560, (1995) https://doi.org/10.1117/12.218511

KEYWORDS: Microwave radiation, Networks, Analog electronics, Stars, Fiber optics, Video, Network architectures, Transmitters, Receivers, Sensors

Read Abstract +

Proceedings Article | 30 May 1995 Paper

Power-over-fiber sensor network

Duncan Liu, Shannon Jackson, Harold Kirkham, Alan Johnston, Larry Bergman, Julian Bristow, Jeffrey Schoess

Proceedings Volume 2482, (1995) https://doi.org/10.1117/12.210530

KEYWORDS: Sensors, Sensor networks, Semiconductor lasers, Prototyping, Capacitors, Packaging, Silicon, Stars, Microcontrollers, Relays

Read Abstract +

Proceedings Article | 30 May 1995 Paper

Multimode optical interconnects with low modal noise for spaceborne databusses and commercial computers

Julian Bristow, Yue Liu, John Lehman, Klein Johnson

Proceedings Volume 2482, (1995) https://doi.org/10.1117/12.210525

KEYWORDS: Waveguides, Signal to noise ratio, Interfaces, Interference (communication), Signal attenuation, Connectors, Visibility, Optical interconnects, Semiconductor lasers, Multimode fibers

Read Abstract +

Acceptance of optical interconnects into spaceborne and ground-based military systems will be limited by the risk and maturity of the technology. Multimode fibers are currently the interconnect medium of choice for military application due to the availability of qualified parts. Multimode optical interconnects also offer lower assembly cost than singlemode interconnects, making them attractive for use in commercial computers. In both applications, modal noise may limit the attainable bit error rate in a digital system. We report on an investigation of the validity of simple expressions for determining modal noise in multimode systems, and consider in particular waveguides supporting fewer modes than typical multimode fibers and waveguides with incomplete modal excitation. We conclude that the simple expressions are valid for losses greater than approximately 0.5 dB per interface, but that the actual signal-to-noise ratio is significantly poorer than that predicted by theory for large displacements of waveguides in which a small fraction of the total modal volume is excited. We describe two simulation techniques for determining the statistics of the transmission associated with a waveguide bend, and find that the simple formula widely used for straight waveguide intersections do not describe curved waveguide interconnects accurately. We also describe a practical demonstration of two optical interconnect systems in which multimode interconnect media incorporating several imperfect interfaces and excited with coherent sources can achieve useful bit error rates in digital systems. In the first interconnect, a fiber optica data bus for satellite use employs six multimode connectors and multimode fiber to transmit data at 1.2 Gbps over distances from 1 meter to 100 meters. In the second interconnect, passive multimode polymide waveguides compatible with intracabinet optical interconnects are used to implement a multichip module (MCM)-to-MCM interconnect in which optoelectronic die are incorporated in a 'chip first' multichip module technology.

Proceedings Article | 5 April 1995 Paper

Cost-effective optoelectronic packaging for multichip modules and backplane level optical interconnects

Julian Bristow, Yue Liu, Terry Marta, Sommy Bounnak, Klein Johnson, Yung-Sheng Liu, Herbert Cole

Proceedings Volume 2400, (1995) https://doi.org/10.1117/12.206334

KEYWORDS: Waveguides, Packaging, Connectors, Optical interconnects, Optoelectronics, Optoelectronic devices, Interfaces, Polymers, Optics manufacturing, Manufacturing

Read Abstract +

Proceedings Article | 5 April 1995 Paper

Polymer-based optical interconnect technology: a route to low-cost optoelectronic packaging and interconnect

Yung-Sheng Liu, Herbert Cole, Julian Bristow, Yue Liu

Proceedings Volume 2400, (1995) https://doi.org/10.1117/12.206296

KEYWORDS: Packaging, Polymers, Optical interconnects, Optoelectronic packaging, Vertical cavity surface emitting lasers, Waveguides, Optoelectronic devices, Computing systems, Electronic components, Thin films

Read Abstract +

Proceedings Article | 8 June 1994 Paper

Microsensor networks

Duncan Liu, Harold Kirkham, Alan Johnston, Larry Bergman, Julian Bristow, Jeffrey Schoess

Proceedings Volume 2215, (1994) https://doi.org/10.1117/12.177644

KEYWORDS: Sensor networks, Sensors, Stars, Optical fibers, Fiber lasers, Photonics, Data transmission, Corrosion, Light emitting diodes, Modulators

Read Abstract +

Proceedings Article | 8 June 1994 Paper

Fiber optic MCM for spaceborne applications

Julian Bristow, John Lehman, Yue Liu, W. Goldberg, John DeRuiter, Dennis Kersch

Proceedings Volume 2215, (1994) https://doi.org/10.1117/12.177630

KEYWORDS: Fiber lasers, Interfaces, Fiber optics, Signal to noise ratio, Sensors, Connectors, Packaging, Semiconductor lasers, Space operations, Polishing

Read Abstract +

Proceedings Article | 2 May 1994 Paper

Hybrid integration of electrical and optical interconnects

Yung-Sheng Liu, Herbert Cole, Julian Bristow, Yue Liu

Proceedings Volume 2153, (1994) https://doi.org/10.1117/12.174526

KEYWORDS: Waveguides, Packaging, Optical interconnects, Optical alignment, Optoelectronics, Optics manufacturing, Thermography, Optoelectronic devices, Adaptive optics, Optoelectronic packaging

Read Abstract +

Proceedings Article | 15 September 1993 Paper

Component tradeoffs and technology breakpoints for a 50 Mbps to 3.2 Gbps fiber optic data bus for space applications

Julian Bristow, John Lehman

Proceedings Volume 1953, (1993) https://doi.org/10.1117/12.156573

KEYWORDS: Receivers, Connectors, Fiber lasers, Sensors, Fiber optics, Signal to noise ratio, Particles, Photonics, Interfaces, Light emitting diodes

Read Abstract +

Proceedings Article | 15 September 1993 Paper

Physical interactions between charged particles and optoelectronic devices and the effects on fiber-based data links

Paul Marshall, Kenneth LaBel, Cheryl Dale, Julian Bristow, Ed Petersen, E. Stassinopoulos

Proceedings Volume 1953, (1993) https://doi.org/10.1117/12.156567

KEYWORDS: Particles, Receivers, Ions, Ionization, Diodes, Satellites, Sensors, Environmental sensing, Indium gallium arsenide, Optoelectronic devices

Read Abstract +

Proceedings Article | 1 July 1993 Paper

Progress and status of guided-wave optical interconnection technology

Julian Bristow, Charles Sullivan, Sayan Mukherjee, Yue Liu, Anis Husain

Proceedings Volume 1849, (1993) https://doi.org/10.1117/12.147108

KEYWORDS: Optical interconnects, Information operations, Waveguides, Interfaces, Optoelectronic devices, Fiber optics, Polymers, Silicon, Connectors, Tolerancing

Read Abstract +

Proceedings Article | 9 February 1993 Paper

Optical express routers for enhanced mesh throughput

Julian Bristow, Thomas Lane, James Kessinger

Proceedings Volume 1784, (1993) https://doi.org/10.1117/12.141084

KEYWORDS: Switches, Waveguides, Channel projecting optics, Logic, Signal processing, Optical amplifiers, Control systems, Receivers, Interfaces, Optical fibers

Read Abstract +

Proceedings Article | 1 April 1991 Paper

Optical interconnects for parallel processing

Aloke Guha, Julian Bristow, Charles Sullivan, Anis Husain

Proceedings Volume 1389, (1991) https://doi.org/10.1117/12.25539

KEYWORDS: Optical interconnects, Parallel processing, Waveguides, Network architectures, Modulators, Optical networks, Switches, Optical arrays, Optical switching, Single mode fibers

Read Abstract +