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Photonics (also called optoelectronics, though this latter term has a more narrow focus) is a field that encompasses light-related technology: light sources, waveguides, and light detectors. In recent years, more products and designs have been based on this technology, most prominently in telecommunications and sensing. As this technology has matured, so has the need to evaluate the performance of photonic devices and increase their reliability and lifetime.
This webpage will highlight some of the basics of photonics and CALCE's
role and research in this field.
Dr. Diganta Das - (301) 405-7770 , digudas@calce.umd.edu
1. Packaging, Manufacturing and Reliability Issues in Photonics (PDF file)
2. Failure Mechanisms and Physics of Failure Assessment of Optoelectronic and Electronic Packages (PDF file)
3. Reliability of Light Sources (LEDs and Lasers) (PDF file)
4. Optical Fiber Components
a. Optical Fibers (PDF file)
b. Optical Fiber Connectors (PDF file)
5. Optical Fiber Sensors
a. Bragg Gratings (PDF
file)
Current
Project
Number: C01-34 - Effect of Proof Testing on Optical Fiber Fusion Splices
CALCE Publications
Patricia F. Mead, Yubing Yang, Melody Burch, Patrick McCluskey, and F. G. Johnson, "Environmental Acceleration Factors of Nonhermetic Packaged AlGaAs LEDs." Photonics West, January 2001. (PDF file)
K. Broadwater, P. F. Mead, “Experimental and Numerical Studies in the Evaluation of Epoxy-Cured Fiber Optic Connector,” IEEE Electronics and Components Technology Conference, Las Vegas, Nevada, pp. 981-988, May 2000. (PDF file)
K. Broadwater, P. F. Mead, "Characterization of Epoxy Cured Fiber Optic Connectors Via Fiber Sensors," ASME Proceedings of the POLY-1999 Workshop on Polymeric Materials for Microelectronics and Photonics Applications: Mechanics, Physics, Reliability, Processing, Paris, France, December 1999. (PDF file)
Mead, P.F., Burch, M., McCluskey, P., Johnson, F.G., "Failure Analysis of Plastic Packaged GaAs and AlGaAs/GaAs Light Emitting Diodes," Internaional Conference for Testing and Failure Analysis Annual Conference, Santa Clara, CA, November 1999.
K. Broadwater, P.F. Mead, “Fiber Optic Reliability using Fiber Optic Sensors,” Proceedings - SPIE The International Society for Optical Engineering 1999, VOL 3860 SPIE Fiber optic sensor technology and applications, Boston, MA, pp. 543-552, September 1999. (PDF file)
K. Broadwater, P. F. Mead, "Stress Characterization of Fiber Connector Assemblies During Epoxy Cure", ASME InterPACK '99 Conference, Maui, Hawaii, pp. 1289-1294, June 1999. (PDF file)
K. Broadwater, P. F. Mead, "Stress Characterization of Fiber Connector Assemblies," 1999 SEM Annual Conference, Cincinnati, Ohio, pp. 727-730, June 1999. (PDF file)
Sagrario, D., Mead,P.F., "Axial-angular displacement fiber optic sensor,", Society of Experimental Mechanics Spring Conference, Bellevue, WA, November 1998. (PDF file)
Chen, Q.Y., Mead,P.F.,Balaji, P., Haislett, D., "Physics of Failure Study of Optoelectronic Laser Transmitter Module", ASME Annual Conference, Atlanta, GA., November 1996.
P. F. Mead, K. Broadwater, “In-Fiber Strain Characterization of Fiber Optic Connector Assemblies Via Bragg Grating Sensors,” Applied Optics, vol. 39.,no. 28, Oct. 1, 2000. (PDF file)
Sagrario, D., Mead, P.F., "Fiber Optic Sensor for Simultaneous Displacement and Rotation Measurements," Applied Optics, vol.37, no.28 p. 6748-54. (PDF file)
Kamath, R., Mead, P.F., "Procedure for Evaluation of Thermal Management Requirements in a Diode Laser Structure", Microelectronics Reliability, Vol. 37, No. 12, p. 1817, 1997. (PDF file)
Chen, Qing Yan Jenny (M.S. Mechanical Engineering), Failure Mechanisms and Reliability Assessment of Optoelectronic and Electronic Packages, 1995.
Broadwater, Keita (Ph.D.) Optical Fiber Sensors for Health Monitoring
of Fiber Optic Connectors, Ph.D. Proposal, 1999.
Bandwidth
The range of frequencies over which a particular instrument is designed to function within specified limits.
Infrared
The invisible portion of the electromagnetic spectrum that lies between about 0.75 and 1000 µm.
Laser
Light Amplification by the Stimulated Emission of Radiation. Lasers usually have low bandwidth and high power. Lasers can operate in the infrared, visible and ultraviolet regions of the optical spectrum.
LED
Light Emitting Diode. LEDs work on the principle of spontaneous emission of light as opposed to stimulated emission. LEDs usually have high bandwidth but relatively low power. LEDs operate in the infrared, visible and ultraviolet regions of the optical spectrum.
Optics
That branch of physical science concerned with vision and certain phenomena
of electromagnetic radiation in the wavelength range extending from the
vacuum
ultraviolet at about 40 nm to the far-infrared at 1 mm. Now being replaced
by the more inclusive term photonics.
Optical fiber
A thin filament of drawn or extruded glass or plastic having a central core and a cladding of lower index material to promote internal reflection. It may be used singly to transmit pulsed optical signals (communications fiber) or in bundles to transmit light or images.
Optical interconnection
The use of photonic devices rather than electronic devices to make connections within and between integrated circuits.
Photodiode
A two-electrode, radiation-sensitive junction formed in a semiconductor material in which the reverse current varies with illumination. Photodiodes are used for the detection of optical power and for the conversion of optical power to electrical power.
Photonics
The technology involving light and photons at all wavelengths between the far-infrared and the ultra-violet. Also called "Optoelectronics".
Splice
A permanent joint whose purpose is to couple optical power among two or more ports. Also, a device whose purpose is to couple optical power between a waveguide and a source or detector.
Ultraviolet
The invisible region of the spectrum just beyond the violet end of the visible region. Wavelengths range from 1 to 400 nm.
Visible Spectrum
Light which can be seen by the unaided human eye, defined in our case as between 400 nm and 750 nm.
Waveguide
A system or material designed to confine and direct electromagnetic waves in a direction determined by its physical boundaries.
Wavelength
Electromagnetic energy is transmitted in the form of a sinusoidal wave.
The wavelength is the physical distance covered by one cycle of this wave;
it is inversely proportional to frequency.
Page Created by Keita Broadwater (keita@calce.umd.edu)
Created on 4/16/01
Last updated, 4/30/01