Process Characterization: Characterization of High-Speed
Optoelectronic Devices
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Introduction
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In collaboration with the Optoelectronics Division and the Radio
Frequency Technology Division of the NIST Electronics and
Electrical Engineering Laboratory (EEEL), SED has demonstrated
that observed high speed optoelectronic signals can be corrected
for the joint effect of time base distortion, timing jitter, drift,
and impedance mismatch distortion.
Background/Impetus
Customers
Goals
Impact
SED Milestones
R&D Team
Achievements
Publications
Presentations
Additional technical information on this project is available at:
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Background/
Impetus
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High bandwidth measurements are needed to support high-performance
systems which take advantage of the potential bandwidth of optical
fiber. Systems presently being installed operate at 5 to 10 gigabits
per second using pure optical time division multiplexing (OTDM) and
research is being done on the next generation of OTDM systems at
20 to 40 gigabits per second. Methods are needed to characterize
the impulse and frequency response of high-speed sources and detectors
to at least the third harmonic of the system modulation rate.
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Customers
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The customers for the high-speed optoelectronic devices project
include:
- Optical telecommunications industry;
- optical interconnect, detector, component, and test
equipment manufacturers;
- gigabit Internet network manufacturers; CATV industry;
- satellite TV industry;
- tethered microwave antenna manufacturers;
- SONET/SDH (synchronous optical network/synchronous digital
hierarchy industry);
- fiber channel industry.
Specific examples are: Agilent, Tektronix, Scientific Atlanta.
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Goals
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The goal of the high-speed optoelectronic devices project is:
- To measure and characterize the impulse response of
high-speed optoelectronic devices.
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Impact
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The impact of the high-speed optoelectronic devices project was
that SED demonstrated that observed high speed optoelectronic
signals can be corrected for the effects of drift, jitter, timebase
distortion and impedance mismatch distortion. As a result, the
feasibility of a proposed calibration service for a multibillion
dollar industry was demonstrated.
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Milestones for the high-speed optoelectronic devices project are:
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FY02 Milestones
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- Develop and release alpha version public domain software for
signal alignment, time base distortion correction and jitter
correction.
- Write a paper on jitter estimation.
- Develop a method for estimating the bias of timebase
distortion estimates.
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FY01 Milestones
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- Develop adaptive estimator of RMS jitter noise for complex
signals.
- Develop Monte Carlo method for quantification of random and
systematic error in power and phase spectra for signals
corrected for alignment error, time base distortion and
timing jitter noise.
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FY00 Milestones
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- Develop a procedure for bias-correction of RMS jitter noise
estimator for time base distortion measurements.
- Develop method for quantification of random uncertainty of
time base distortion estimator.
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FY99 Milestones
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- Develop a least-squares procedure for estimation of timebase
distortion.
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FY98 Milestones
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- Compare existing timebase distortion estimation methods.
- Develop improved signal alignment methods, and compare to
existing methods.
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R&D Team
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Kevin
Coakley, Statistical Engineering Division, ITL
Jack
Wang, Statistical Engineering Division, ITL
Paul Hale, Optoelectronics Division, EEEL
Tracy Clement, Optoelectronics Division, EEEL
Don DeGroot, Radio Frequency Technology Division, EEEL
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Achievements
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The achievements of the high-speed optoelectronic devices project
include:
- A least-squares procedure for estimating the timebase
distortion of sampling oscilloscopes was developed. The
procedure can also accurately estimate the order of the
harmonic model that is used to account for the amplitude
nonlinearity of the sampling channel.
- Examined the bias of using the method of the first-order
approximation to estimate the additive and time jitter noises
in timebase distortion measurements. Developed a procedure
to adjust for the bias in the estimates.
- Studied the bias and variance of a least-squares timebase
distortion estimate that uses multiple sets of waveforms.
Based on simulations, a method for calculating the random
uncertainty of the timebase distortion estimate is proposed.
- Developed a program to study the effects of amplitude and
phase drifts, as well as jitter error on the estimation of
timebase distortion.
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Publications
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The publications resulting from the high-speed optoelectronic
devices project include:
- C. M. Wang, P. D. Hale, K. J. Coakley, and T. S. Clement,
"Uncertainty of oscilloscope timebase distortion estimate,"
IEEE Transactions on Instrumentation and Measurement,
in press.
- K. J. Coakley and P. D. Hale, "Alignment of noisy signals,"
IEEE Transactions on Instrumentation and Measurement,
50 (1), pp. 144-149 (2001).
- P. D. Hale, T. S. Clement, K. J. Coakley, C. M. Wang,
D. C. DeGroot, and A. P. Verdoni, "Estimating the magnitude
and phase response of a 50 GHz sampling oscilloscope using
the 'nose-to-nose' method," 55th ARFTG Conference
Digest, pp. 35-42 (2000).
- P. D. Hale, and C. M. Wang, "Heterodyne system at 850 nm for
measuring photoreceiver frequency response," Technical
Digest of Symposium on Optical Fiber Measurements,
pp. 117-120 (2000).
- T. S. Clement, P. D. Hale, K. J. Coakley, and C. M. Wang,
"Time-domain measurement of the frequency response of
high-speed photoreceivers to 50 GHz," Technical Digest of
Symposium on Optical Fiber Measurements,
pp. 121-124 (2000).
- P. D. Hale, and C. M. Wang, "Calibration service of
optoelectronic frequency response at 1319 nm for combined
photodiode/rf power sensor transfer standards," Special
Publication 250-51, National Institute of Standards and
Technology, Gaithersburg, MD (1999).
- C. M. Wang, P. D. Hale, and K. J. Coakley, "Least-squares
estimation of time-base distortion of sampling oscilloscopes,"
IEEE Transactions on Instrumentation and Measurement,
48 (6), pp. 1324-1332 (1999).
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Presentations
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The presentations resulting from the high-speed optoelectronic
devices project include:
- K. J. Coakley, "Correcting Optical Impulse Response
Measurements for Time Base Distortion, Drift and Jitter,"
Telecommunications Industry Association and International
Electrotechnical Commission Symposium, Koloa, HI,
January 23, 2002.
- K. J. Coakley, "Some Statistical Problems in Optoelectronics,"
Institute of Statistics & Decision Sciences, Duke University,
Durham, NC, November 10, 2000.
- K. J. Coakley, "Statistical Problems in Optoelectronics,"
National Research Laboratory of Metrology, Tsukuba, Japan,
May 15, 2000.
- K. J. Coakley, "Statistical Problems in Optoelectronics,"
Telcordia Technologies, Morristown, NJ, March 30, 2000.
- K. J. Coakley, "Alignment of Noisy Signals," Department of
Statistics, Colorado State University, Ft. Collins, CO,
October 25, 1999.
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Date created: 2/6/2002
Last updated: 2/6/2002
Please email comments on this WWW page to
sedwww@nist.gov.
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