Reference Guide to Fiber Optic Testing by J. Laferriere, G. Lietaert, R. Taws, S. Wolszczak
By J. Laferriere, G. Lietaert, R. Taws, S. Wolszczak
IN ENGLISH, good illustrated, 137 pages
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1 Optical Fiber Testing When analyzing a fiber optic cable over its product lifetime, a series of measurements must be performed in order to ensure its integrity. – Mechanical tests – Geometrical tests – Optical tests – Transmission tests The first three sets of measurements are only performed once since there is minor variation in these parameters during the fiber’s lifetime. Several measurements are performed on optical fiber or cables in order to characterize them before their use in signal transmission.
LIGHTWAVE Previous Page | Contents | Zoom in | Zoom out | Front Cover | Search Issue | Next Page LIGHTWAVE Previous Page | Contents | Zoom in | Zoom out | Front Cover | Search Issue | Next Page 49 Light Source Light Source FUT Power Meter Reference Fiber Power Meter Insertion loss measurement with two bi-directional loss test sets Most of the current LTS instruments are now fully automated bi-directional test instruments. With the press of a button, bi-directional measurement is performed in few seconds, and a complete report is generated.
An increase in transmitter noise that reduces optical signal to noise ratio (OSNR) in analog video transmission (CATV) systems and increases BER in digital transmission systems • An increase in light source interference that changes the laser’s central wavelength and varies the output power • A higher incidence of transmitter damage There are available solutions that will allow for a reduction in the ORL value or will limit the undesirable effects associated with a high ORL value. 4 Non-Linear Effects Non-linear effects are mainly caused by the high power level and small effective area of the fiber.