Blog

Terms and Terminologies you should know about FTTH PON Network

Attenuation reduction of the signal magnitude or loss, caused by absorption and scattering Values are normally expressed in decibels (dB)
Attenuator a passive device for reducing the amplitude of a signal without distorting the waveform
Bidirectional a device, which operates in both directions
Broadband Device optical broadband devices cover a wide range of wavelengths
Center Wavelength the nominal operating wavelength of an optical device
Coupler a bidirectional device with three or more fiber ends, combining the signals of two or more input ports into one output port Also referred to as splitter
Decibel (dB) a logarithmic unit of measurement for calculating the attenuation of an optical device or an optical system A change of -3 dB equates to the halving of the optical power
Demultiplexer a device that separates two or more multiplexed signals into its original single signals; the inverse of a multiplexer
Directivity the amount of undesired optical signals observed at a given input port of a device Also referred as near-end crosstalk (NEXT)
Dual Window a passive optical component that is optimised to operate at two different center wavelengths For example at 1310 nm and 1550 nm
Excess Loss attenuation or loss of the optical component itself, without including any attenuation effects of the device due to signal splitting
Fused Biconical Tapering (FBT) a manufacturing process for passive optical network components It consist of twisting bare fibers together, stretching and then fusing the fibers together
Insertion Loss (IL) a sum of excess loss, splitting loss and loss caused by other optical effects Total loss experienced by signal traversing the device
Isolation the amount of undesired optical signals observed at a given output port of a device Also referred as far-end crosstalk (FEXT)
Multiplexer a device that combines two or more signals into a single output; the inverse of a demultiplexer
Operating Wavelength the wavelength, or wavelength range, for which a passive optical component is optimised for operating
Planar Lightwave Circuit (PLC) a manufacturing process for optical passive network components Its main components is a waveguide array that is induced in a silica chip by using a photolithographic masking process
Polarization Depen- dent Loss (PDL) changes in attenuation caused by the state of polarisation (SOP) This optical effect results in a deviation between the maximum and minimum loss on an optical device
Return Loss (RL) the ratio of optical power reflected back along the path of transmission from a connector or any other optical device Values are normally expressed in decibels (dB)
Single Window a passive optical component that is optimised to operate at a single specified center wavelength For example at 1310 nm or 1550 nm
Splitter a bidirectional device with three or more fiber ends, which divides the signal from one input port into two or more output ports Also referred to as coupler
Splitting Ratio the percentage of optical power transferred to an output port of an optical device, with respect to the total power at the input to the device
Uniformity the maximum deviation of insertion loss between the different ports on a device within the operating wavelength range
Wavelength Division Multiplexing (WDM) a technique of transmitting various signals at different wavelengths through the same fiber
FTTH , , , , , , , , , , ,
WhatsApp TARLUZ