What are the factors of light loss? The reasons for the loss of light are as follows
• loss of natural light
• Insertion loss of optical components inserted into optical transmission lines
• Earpiece loss on fiber optic connection
• Impedance mismatch in the cable causes reflection of light, this is called Return Loss
• Bending, pinching, impurities and unevenness of the fiber material cause loss
fiber optic connection
• Fixed splicing, commonly known as dead splicing, generally uses optical fiber fusion splicing machines for straight ends of optical cables.
• Active joints, commonly known as active joints, are connected with detachable connectors and are used for optical fiber jumpers and equipment connections.
Tips for Immobilizing Joints
The installation of fixed joints should adopt the secondary discharge welding method. First, preheat and discharge the end face of the optical fiber, shape the end face, remove dust and debris, and make the end face pressure of the optical fiber uniform through preheating.
light has noise
In addition to attenuation, noise can also affect the transmission effect of optical fiber information. Attenuation means fewer useful signals, and noise means more unwanted signals.
cause of noise
• Unqualified extinction ratio
• Light intensity varies randomly
• Caused by time jitter
• Receive point noise and thermal noise
• Fiber Mode Noise
• Pulse broadening due to dispersion
• Mode distribution noise of LD
• Frequency chirping of LD
• reflection
