ABSTRACT
The transmitter is directly modulated by the injection current with RZ and NRZ signals in the gigabit per second (Gb/sec range). The jitter and the pulse distortion of the signal resulting from mode partition noise and bursts have an effect particularly on transmission of signals in the Gb/sec range on account of their relatively small horizontal eye opening. A dynamic single-mode laser can be employed or the zero-dispersion wavelength of the fiber can be shifted to the required transmission range. A multimode laser emitting near 1.31 µm wavelength and negligible fiber dispersion was reported for this system. One of the objects is to give an insight into the design of Gb/sec systems for users with limited access to optical and optoelectronic components. The semiconductor laser was temperature-stabilized for all systems. A system for regulating the laser output power is necessary in practical systems but was not provided in the laboratory models.
