Application Scheme of 1550nm Insertion Technology

HS15110D-CTA automatic insert optical transmitter in 1550nm direct modulation added main optical power monitoring, 200G FWDM device and optical modulator, the size of the main wave and the power of the carrier channel, output level error, through the cognition and understanding of intelligent control program into MCU, using this program can simplify this series of complex problems, in order to achieve the ideal slot effect. This machine supports HFC network equipment management, which can realize remote control.

The 1550nm optical propagation technology can realize the mixed transmission between the main 1550 segment and the 1550 point secondary signal. The principles of the interrupt scheme are as follows:

1.Different wavelengths were selected for interruption with a wavelength interval of 2.35nm. ITU standard C band 1550nm segment has 37 channels, of which C16 is 1564.68nm, C53 is 1535.04nm, channel separated by 0.79nm, that is, the channel channel should be separated by 3 channels or 2.35nm;

2.The RF frequency of the optical carrier cannot be repeated, otherwise the same frequency interference. The conventional main optical carrier is multiple (60 CH or above) RF channels, the interruption point carrier channel is less (32 CH or below), because the optical interruption to the last light reception are demodulated into RF channel, such as the channel repetition will produce the same frequency interference;

3. The main transmission power is the main interruption power as the secondary to ensure the comprehensive transmission performance index of RF after interruption. After insertion will affect the RF performance index, the greater the insertion power, the more CNR deterioration, it is recommended to have RF less channels, light carrier low power insertion;

4. Using the HFC network equipment management system, the HS15110D-CTA automatic insert optical transmitter can be operated remotely. Although the automatic interruption light transmission opportunity to automatically adjust the size of the main input optical power, but it cannot get the main optical signal and interruption optical signal RF carrier channels, conventional 1550 optical transmitter have automatic adjustment system control, when the carrier RF channel change the time generator system has changed, that is, the optical receiver after the output level also change, so through the HFC network equipment management system, set the host and the interruption RF carrier channel value, can obtain the best RF transmission performance after the interruption.