Table of Contents
Advertisement
907-0601-00 Rev. C
Model 907 Video/Data Multiplexer – User's Guide
7.0 Fiber Optic System
Model 907 cards are configured to form video and data multiplexing systems with specific requirements,
including optical link length, data throughput, system redundancy and cost. Wavelength division multiplexers
(WDM) or coarse wavelength division multiplexers (CWDM) are often used to increase system capacity over
a single optical fiber. Optical splitters and switches are used to increase the reliability of the system by
providing fiber redundancy. Choice of optical transmitter power and wavelength, receiver sensitivity, fiber type
(singlemode versus multimode), and fiber optic rotary joint (FORJ) selection are critical to ensuring the optical
system meets all performance criteria.
Figure 7-1 illustrates block diagrams for some example optical configurations. These arrangements are by no
means exhaustive. Diagram A illustrates a dual-fiber optical configuration passing through a two-pass FORJ.
Diagram B illustrates an example of a 1310/1550 nm transceiver pair multiplexed onto a single optical fiber
and sent through a single-pass FORJ. Diagram C illustrates multiple transceivers (say from two separate
cards, for example a motherboard and media converter) optically multiplexed using a CWDM device onto a
single fiber, and Diagram D illustrates a single transceiver pair using WDM multiplexing, but with an in-line
1x2 switch for a redundant backup link.
Figure 7-1: Example Optical Configurations
7.1
Safety
All lasers used in the Model 907 system are Class I laser devices per IEC-60825 unless otherwise specified in
installation or configuration drawing. No special control measures or warning labels are required, although
any needless exposure of the eye should be avoided as a matter of good practice, and fibers should never be
viewed with magnifying instruments, e.g. fiber scopes, while optical power is present.
Focal Technologies Corp.
Page 7-1
Hide quick links:
Advertisement
Table of Contents
