The first directly modulation format can generate modualtion chirp and it affects the transmission distance. The second external modualtion format makes the downlink data transmits 70km which is 30km longer than the first one.Secondly, a scheme of chi hair straightener sextuple mm-wave generation are proposed and realized: we generate modulation format which first and second order sidebands and carrier are suppressed by adjusting the DC bias to be 4V and chi flat iron voltage to be 9.76V and also the phase difference of the RF to be 180.The phase difference is 180 generated by DC voltage. Two third order sidebands are left to generate 60GHz mm-wave signal.. We have two chi flat iron different method to realize data signal upconversion: firstly, we use the data signal to modulate the directly modulated laser; Secondly, the intensity modulator is modulated by the data signal. The first directly modulation format can generate modualtion chirp and it only transmits 30km. The second external modualtion chi hair straighteners format makes the downlink data transmits 40km. Finally, a scheme of 40GHz eightfold mm-wave generation are cheap ralph lauren polo shirts proposed and realized: we use two LN-MZMs with parallel hair straighteners connection, both of which were used to generate signals which odd order sidebands and carrier are suppressed. Then the two signals are coupled to transmit along fiber, because the second order sidebands of the two generated signals have the opposite phase, only the fouth order sidebands are left to generate eightfold mm-wave signal.
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