Lucent Technologies OptiStar EdgeSwitch, Руководство пользователя

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Lucent Technologies
365-575-925R1.5
Issue 1, April 2002
protective housing / access panel is typically installed in front of the laser circuit pack shelves. The circuit
packs themselves, however, may be FDA/CDRH Class I or IIIb or IEC Class 1, 3A, or 3B.
Laser Safety Precautions for Optical Fiber Telecommunication Systems
In its normal operating mode, an optical fiber telecommunication system is totally enclosed and presents no
risk of eye injury. It is a Class I/1 system under the FDA and IEC classifications.
The fiber optic cables that interconnect various components of an optical fiber telecommunication system
can disconnect or break, and may expose people to laser emissions. Also, certain measures and
maintenance procedures may expose the technician to emission from the semiconductor laser during
installation and servicing. Unlike more familiar laser devices, such as solid-state and gas lasers, the
emission pattern of a semiconductor laser results in a highly divergent beam. In a divergent beam, the
irradiance (power density) decreases rapidly with distance. The greater the distance, the less energy will
enter the eye, and the less potential risk for eye injury. Inadvertently viewing an unterminated fiber or
damaged fiber with the unaided eye at distances greater than 5 to 6 inches normally will not cause eye injury
provided the power in the fiber is less than a few milliwatts at the near IR wavelengths and a few tens of
milliwatts at the far IR wavelengths. However, damage may occur if an optical instrument such as a
microscope, magnifying glass or eye loupe is used to stare at the energized fiber end.
Laser Safety Precautions for Enclosed Systems
Under normal operating conditions, optical fiber telecommunication systems are completely enclosed;
nonetheless, the following precautions shall be observed:
1.
Because of the potential for eye damage, technicians should not stare into optical connectors or
broken fibers.
2.
Under no circumstance shall laser/fiber optic operations be performed by a technician before
satisfactorily completing an approved training course.
3.
Since viewing laser emissions directly in excess of Class I/1 limits with an optical instrument such
as an eye loupe greatly increases the risk of eye damage, appropriate labels must appear in plain
view, in close proximity to the optical port on the protective housing/access panel of the terminal
equipment.
CAUTION: Use of controls, adjustments and procedures other than those specified
herein may result in hazardous laser radiation exposure.