Lithium Battery; Laser; General Laser Information; Laser Safety Guidelines - Huawei AR120 Product Description

Huawei AR120&AR150&AR160&AR200&AR510
Series Enterprise Routers
Safety and Regulatory Compliance Information

3.4.2 Lithium Battery

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3.5 Laser

The laser hazard level of this device is Class 1.
When handling optical fibers, do not stand close to, or look at the optical fiber outlet directly
with unaided eyes.

3.5.1 General Laser Information

Laser transceivers or transmitters are used in the optical transmission system and associated
test tools. The wavelength of the laser is between 780 nm and 1600 nm. Because the laser is
transmitted through the optical fiber, it has very high power density and is invisible to human
eyes. When a beam of light enters the eye, the retina may be damaged.
Laser of wavelengths used in telecommunications can cause thermal damage to the retina.
Lasers used in lightwave systems have a larger beam divergence, typically 10 to 20 degrees.
Viewing an un-terminated fiber or damaged fiber with the unaided eye at distances greater
than 150 mm (6 inches) will normally not cause eye injury. However, damage may occur if an
optical tool such as a microscope, magnifying glass or eye loupe is used to view the energized
fiber end.
In its normal operating mode, a lightwave system is totally enclosed and presents no risk of
eye injury. Additional safety is achieved by an automatic laser shut-down (ALS) of the system.
The ALS, however, can be applied for bi-directional transmission only. If the receiver side
does not detect the laser from the transmission side, it will give the transmission side a signal.
Upon receiving the signal, the ALS will shut down the laser emission within 100 ms.

3.5.2 Laser Safety Guidelines

Read the following guidelines to avoid laser radiation:
Issue 06 (2015-05-08)
WARNING
There is danger of explosion if the battery is incorrectly replaced. Therefore, replace the
battery only with the same or equivalent type recommended by the manufacturer.
Dispose the used batteries according to the manufacturer's instructions.
Do not dispose of lithium battery in fire.
WARNING
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