| Large
Core Fiber |
Usually,
a fiber with a core of 200 µm or more. |
| Large
Effective Area Fiber (LEAF) |
An
optical fiber, developed by Corning, designed to
have a large area in the core, which carries the
light. |
| Launch
Fiber |
An
optical fiber used to couple and condition light
from an optical source into an optical fiber. Often
the launch fiber is used to create an equilibrium
mode distribution in multimode fiber. Also called
launching fiber. |
| L-Band |
The
wavelength range between 1570 nm and 1610 nm used
in some CWDM and DWDM applications. |
| Light |
In
a strict sense, the region of the electromagnetic
spectrum that can be perceived by human vision,
designated the visible spectrum and nominally covering
the wavelength range of 0.4 µm to 0.7 µm.
In the laser and optical communication fields, custom
and practice have extended usage of the term to
include the much broader portion of the electromagnetic
spectrum that can be handled by the basic optical
techniques used for the visible spectrum. This region
has not been clearly defined, but, as employed by
most workers in the field, may be considered to
extend from the near-ultraviolet region of approximately
0.3 µm, through the visible region, and into
the mid-infrared region to 30 µm. |
Lightguide
|
Synonym
for optical fiber. |
| Loose
Tube Buffering |
A cable
construction in which the optical fiber is placed
in a plastic tube having an inner diameter much
larger than the fiber itself. The loose tube isolates
the fiber from the exterior mechanical forces acting
on the cushion. The space between the tube and the
fiber is often filled with a gel to cushion the
fiber. |
| Loss |
The
amount of a signal's power, expressed in dB, that
is lost in connectors, splices, or fiber defects. |
| Loss
Budget |
The
total acceptable loss for a given system from transmitter
to receiver. Includes cables, splices and connectors. |
| Low
Smoke, Zero Halogen (LSZH) |
Thermoplastic
or thermoset jacketing compounds that emit limited
smoke and no halogens when exposed to high sources
of heat. |
