...
| Wiki Markup |
|---|
!http://www.flukenetworks.com/sites/flukenetworks.com/files/assets/FT_FiberTestSimpliFiber.jpg|border=1! Fig. 8. Fiber testing in environment *\[67\]* |
Tensile strength of fiber is tested first: reel of drawn fiber is clamped through a series of capstans and loaded to test the minimal tensile strength required. The fiber is then placed onto reels for distribution and separated equally to required lengths.
Next fiber is tested for any faults using Optical Time Domain Reflectometer (OTDR), which manipulates dispersed light to indicate the exact point of defects along the whole length.
...
- bandwidth: capacity of waveguide (higher capacity required for multimode);
- attenuation: signal strength decrease over distance;
- cut-off wavelength: above which only a single mode propagates;
- numerical aperture: light acceptance angle of an optical fiber is measured;
- mode field diameter: the radial width of the light pulse in the fiber in single-mode fiber; required for interconnecting;
.Wiki Markup chromatic dispersion: rays of different wavelengths have different velocity through the core and spread short pulses of light; for single-mode fiber it limits information bandwidth
...
. !http://fwallpapers.com/files/imagecache/psp/images/optical-fiber-bokeh.png|border=1,width=303,height=172! Fig. 9. Optical fibers *\[
...
6\]*
| Wiki Markup |
|---|
In addition, _mechanical and environmental testing_ is also done for the fiber to comply optical and mechanical integrity of product and customer requirements *\[1\]*: |
...