Index Multimode Bare Fiber Optic Cable For Infrared And Visible
Multimode fiber have large fi ber core sizes and large numerical
apertures, making them well suited for collecting light from large
or diffuse sources such as LEDs or white light lamps.
They are also well suited for high power applications as the power
is transmitted through a large cross section compared to singlemode
or polarization maintaining fibers. The drawback with multimode
fibers is that they do not maintain the high quality spatial
properties of lasers.
Instead the light is dispersed among multimode modes within the
fiber, generating an out speckle pattern when the light emerges
from the other end of the fiber.
Typically these fibers are suitable either for near infrared and
visible wavelengths (IRVIS fi bers) or for near ultraviolet and
visible wavelengths (UVVIS fi bers).
UVVIS multimode fibers typically are built with added amounts of
hydroxyl (OH) ions added to enhance ultraviolet transmission at the
expense of infrared transmission.
Multimode fibers can be further classified as follows:
Graded-Index multimode fibers (MMF):
These fibers have a fiber core with a refractive index that varies
from the center to the edge.
They are mainly used for telecommunications applications, and come
in three standard core/cladding sizes - 50/125, 62.5/125, and
DTS0135 Optics reserves the right to change any specifi cations
without prior notice.
28 January 2014 250 micron OD Fiber 900 micron OD Fiber 3mm OD
Cabled Fiber 2 Step-Index silica core (QMMF) fibers:
These fibers have a fiber core with a constant index of refraction.
Typically the fiber core is fused silica, doped with an element
like germanium, while the fiber cladding is typically undoped fused
silica for fibers with numerical apertures up to 0.22, and
typically a hard polymer for higher numerical apertures.
These fibers are available with core sizes ranging from 10 microns
to 1500 microns,
and NAs ranging from 0.12 to 0.5.