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- The article then explores the most common data formats for optical media: Compact Disc Digital Audio, ISO 9660, the Joliet and HFS extensions, and the Universal Data Format (with an eye towards DVD-Video).
journal.code4lib.org/articles/9581
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Oct 10, 2024 · Paper, Microfilm/Microfiche, and Optical Media. Magnetic Media and Solid State media are only viable as “short term” backup or storage as they are too fragile.
Three examples illustrate several of the issues inherent in optical communications systems: a trans-oceanic optical fiber cable, an optical link to Mars, and an incoherent intra-office link carrying computer information. First consider a trans-oceanic optical fiber.
- 1 Optical Transmitter
- 2 Optical Receiver
- 3 Optical Fiber
Figure 2.1 shows a block diagram for an optical communication system. On the transmitter side a time-division multiplexer (MUX) combines N parallel low data rate streams into a fast serial data stream with N times higher bit rate. A laser driver drives the laser diode or a modulator driver drives a modulator. The laser driver modulates the current ...
On the receiver side, the photodetector receives the optical signal coupled from the optical fiber and converts it to an electrical current signal. The current signal generated by the photodetector is usually small due to the fiber attenuation after long distance and the low responsivity for the photodetector in nanometer CMOS technology. The photo...
Optical fibers have a core from silica with refraction index n1 surrounded by a cladding material with a lower index of refraction (n2) as shown in Fig. 2.2. Light is kept in the core by total internal reflection. Coating is a material that is put over the cladding of an optical fiber to protect it from the environment. The buffer material (general...
- Mohamed Atef, Horst Zimmermann
- 2016
Dec 14, 2016 · This chapter begins with a brief history of optical communication before describing the main components of a modern optical communication system. Specific attention is paid to the development of low-loss optical fibers as they played an essential role after 1975.
- Govind P. Agrawal
- Govind.Agrawal@rochester.edu
- 2016
Summary. Non-zero dispersion shifted fiber for DWDM LED’s for low speed/short distance. Lasers for high speed and long distance. DWDM systems use 1550 nm band due to EDFA Raman Amplifiers for long distance applications O/O/O switches are bit rate and data format independent.
- 477KB
- 35
Optical Data Communication. A modern alternative to sending (binary) digital information via electric voltage signals is to use optical (light) signals. Electrical signals from digital circuits (high/low voltages) may be converted into discrete optical signals (light or no light) with LEDs or solid-state lasers.
Dec 14, 2016 · This chapter begins with a brief history of optical communication before describing the main components of a modern optical communication system.