A Six-Section Photonic Integrated Transmitter With Chirp Control for Extension of the Transmission Reach

We demonstrate a novel directly modulated transmitter, based on six-section photonic integrated circuit. The device uses unique master-slave configuration with variable optical attenuator in between, allowing decoupling of cavities and independent control the injection power. VOA also provides ability to find an optimum level that balances trade-off between extinction ratio chirp transmitted signal. Using device, error-free transmission 10 Gb/s non-return-to-zero signal over 25 km 50 standard single mode fibre is achieved.