110 Apr-09
Avantes www.avantes.com info@avantes.com
5.2.2 Bifurcated cables
Typically bifurcated fibers will have 2m length with the splitting point in the middle (1m) of the
assembly.
Note that for the bifurcated fibers the light is entered into 2 different fibers that split up into the 2
different legs, the fibers are located next to each other.
Please follow the next rules:
1. Gently remove the plastic protection caps from the fiber SMA connectors.
2. Inspect the fibers if light is transmitted, note that for small fiber diameters the transmitted light
energy may be low, so it is hard to see.
3. Do not bend the fiber too tightly, the minimum recommended bending radius of a fiber is 600
times the core/cladding diameter (i.e. 12 cm for a 200µm fiber), further bending may induce
losses in optical transmittance. Bending the fiber below a radius of 200 times the fiber diameter
may cause irreversible damage.
4. Keep connectors and tips protected by the plastic caps when not in use.
5. When necessary the fiber end can be cleaned with soft tissue and alcohol or acetone, avoid
scratching.
6. Do not exceed temperature specifications.
In our standard quality assurance procedure, each fiber optic assembly is labeled with a serial nr,
and some standard test are being carried out with a spectrometer and AvaLight-CAL Line source and
registered:
1. Spectral attenuation at 253 nm for UV/VIS fibers, spectral attenuation at 763 nm for VIS/NIR
fibers.
2. Symmetries of the connector for both sides; the maximal peak value is allowed to move as many
nm as the registered resolution of the fiber / spectrometer.
3. Optical inspection of scratches on the surface.
4. A Deep-UV burn-in of 8 hours to pre-solarize the -SR assemblies, the attenuation at 215nm is
registered.
There is always a label attached to the fiber optic cable or assembly that will tell you the serial nr,
so the QA data can be retraced.
SMA-905
2 fibers
980 mm
40 mm 14 mm
980 mm
2 meter
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