The key management of direct/external modulation semiconductor laser response systems for relative intensity noise control

<p><span>This study outlines the management of either direct or external modulation semiconductor laser systems for key solution bit rate up to 25 Gb/s under relative intensity noise (RIN) control. The bias and peak currents based equations are optimized achieve max Q factor min error (BER) using first proposed model optical/electrical signal power, ratio also enhanced second model. percentage enhancement in max. Q-factor min. BER ranges from 53.25 % 71.63 compared previous In same way, by model, electrical power at optical receiver is within range 48.66 68.88 Optical signal/noise (OSNR) after fiber cable (OFC), (SNR) filter measured with different pulse generators modulators optimization stage. reported better values than addition (direct modulation) has outlined while Q, kept constant. It found that non return zero generator presented other As well as mixed raised cosine modulator OSNR OFC continuous phase frequency shift keying (CPFSK) modulator, While SNR (PSK) modulator.</span></p>