Product Information
GLM
GBIC
1 x 9 Transceiver
Small Form Factor Transceiver
GLM
The optical GLM is a single port communications card. Each communication
port consists of a transmitter and receiver optical subassembly. The
transmitter subassembly contains a semiconductor laser diode of gallium
aluminum arsenide (GaAlAs). This material emits in the wavelength range of
770 to 860 nanometers for shortwave and 1270 to 1355 nanometers for long
wave, and are commonly referred to as short wavelength (SW) or long
wavelength (LW) lasers. The discrete laser diodes are classified as Class 3B
laser products. Once they are incorporated into the GLM, the product’s
automatic power control maintains the average power launched into a fiber at
a value below the Class 1 limit.
Note
OFC GLMs are found only on the LP6000. Any reference
to OFC or non-OFC products applies only to the LP6000,
and not to other HBA models.
For OFC GLMs (Open Fiber Control) the optical fiber link between two GLM
ports is continuously monitored by the open fiber link detection and laser
safety control system (OFC). In the event of a break anywhere in the path,
this control system prevents laser emissions from exceeding Class 1 levels.
For non-OFC links, the optical power from the laser transmitter is controlled
and maintained at a lower power level. The power emitted from either an
open fiber or open laser transmitter is guaranteed to be below the Class 1
limit. Class 1 laser products are not considered hazardous. No user
maintenance, service operations or adjustments can be performed on any
GLM accessory.
Emulex Documentation, Drivers and Software
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