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GigWorks MKII-16 Switch Model MKII-BASE16
Installer's/User's Manual 59003-01 Rev. A
Table Of Contents 7
Optical GBICs
Each optical GBIC is a single communications port. Each communications port
consists of a transmitter and receiver optical subassembly. The transmitter
subassembly contains internally a semiconductor laser diode of either: 1) the
gallium aluminum arsenide (GaAlAs) type emitting in the wavelength range of
770 to 860 nanometers (commonly referred to as Shortwave (SW)) or 2) indium
gallium arsenide phosphide (InGaAsP) type emitting in the wavelength range of
1270 to 1355 nanometers (commonly referred to as Longwave (LW)). Both SW
and LW discrete laser diodes are classified as Class 3B laser products rated at 5.0
milliwatts peak power. Once they are incorporated into the optical GBIC, the
product’s automatic power control and power monitoring system maintains the
average power that exits from an open fiber at a value below the Class 1 limit for
either SW or LW laser link products. In addition, for those GBIC products that
contain Open Fiber Control (OFC) the optical fiber link between two GBIC ports
is continuously monitored by the open fiber link detection and laser control safety
system; in the event of a break anywhere in the path, this control system prevents
laser emissions from exceeding Class 1 levels. For the non-OFC links, the optical
power from the laser transmitter is controlled and maintained at a lower power
level such that the power emitted from either an open fiber or an open laser
transmitter is guaranteed to be below the Class 1 limit. Class 1 laser products are
not considered to be hazardous. There are no user maintenance or service
operations or adjustments to be performed on any optical GBIC.
Usage Restrictions
Failure to comply with these usage restrictions may result in incorrect operation
of the system and possibly points of access that may emit laser radiation above
Class 1 limits established by the IEC and the U.S. DHHS.
1. Optical GBICs are designed and certified for applications using point-to
point optical fibre links only. Use of the product with multiple input or
multiple output optical links (for example, star couplers) is prohibited since
it is incompatible with the product’s design and function and may require
that the user certify the laser product again for conformance to the laser
safety regulations.
2. An optical GBIC that contains OFC will not allow normal data transmission
on the optical link unless it is connected to another GBIC that also contains
OFC with the same OFC timings.
Laser Safety Information