High-Speed Characterizatin of Optical Telecommunication Signals
Optical telecommunication systems constantly evolve toward higher bit rates, requiring the modulation and detection of higher-bandwidth optical waves. Commercial systems operating at 40 Gb/s are now available and research and development efforts are targeting higher bit rates for which optical pulses with picosecond-range duration are used. Chromatic dispersion, nonlinearities and amplified spontaneous emission from optical amplifiers are sources of transmission impairments that must be characterized and mitigated. Advanced modulation formats rely on the modulation of not only the amplitude of an optical wave (e.g., on/off keying), but also its phase (e.g., phase-shift keying) in order to optimize the transmission capabilities. The importance of the characterization of the properties of optical sources and components and the specificities of the optical telecommunication environment with respect to ultrafast optics are emphasized. Various diagnostics measuring the electric field of optical sources in the telecommunication environment are described. Sampling diagnostics capable of measuring eye diagrams and constellation diagrams of high-bit-rate, data-encoded sources are presented. Various optical pulse characterization techniques that meet the sensitivity requirements imposed by the telecommunication environment are also described.
- Research Organization:
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC52-92SF19460
- OSTI ID:
- 903445
- Report Number(s):
- DOE/SF/19460; 2006-199; 1709; TRN: US200720%%271
- Journal Information:
- Commercial and Biomedical Applications of Ultrafast Lasers VII, edited by J. Neev, S. Nolte, A. Heisterkamp, and C. B. Schaffer (SPIE, Bellingham, WA, 2007), Vol. 6460; Conference: SPIE Photonics West, San Jose, CA, 20-25 January 2007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMMUNICATIONS
DATA TRANSMISSION
AMPLIFIERS
DETECTION
ELECTRIC FIELDS
MODULATION
OPTICS
PHASE SHIFT
SENSITIVITY
optical telecommunications
optical pulse characterization
sampling techniques
nonlinear optical sampling
linear optical sampling
spectrography
tomography
interferometry
eye diagram
constellation diagram