Optic fibre is a kind of transmission medium that has the high capacity property

and get extensive application in recent years. As well as development of fibre to the house and much broadband signal needs transmit

a same optical fibre must transmit more signal

Dense Wavelength Division Multiplexing （DWDM） make unitary optical fibre can transmit more data signal. Optic fibre is replacing the coaxial cable

and Cable Television of optical cable have become the develop tendency on the profession of broadcasting and television. DWDM makes optical fibre have installed in cable television network to get use fully

This technical straight more and more uses in the cable television of optical fibre.