Index Multimode Bare Fiber Optic Cable For Infrared And Visible Wavelengths
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 100/140.
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.