Abstract
Recently, a method of pulse generation has been demonstrated in which a sinusoidally driven electroabsorption modulator optically gates the output of a cw laser, producing transform-limited pulses.1 With this technique, integrated laser/modulators initially developed as non-return-to-zero (NRZ) data transmitters can serve as compact pulse sources with tunable repetition rate, wavelength, and pulse width, well suited to soliton and optical time-division-multiplexing (OTDM) applications. However, an additional modulator is required to encode data onto the pulse stream, adding cost and insertion loss to the transmitter. Wakita et al.2 have added the function of data encoding to a faser/modulator pulse source by integrating a second modulator, thereby increasing the complexity of the chip. Raybon et al. have performed integrated data encoding by directly modulating the laser with NRZ data; however, a small amount of chirp is added by this technique.
© 1995 Optical Society of America
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