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An all fiberoptic configuration to generate multi-wavelength picosecond optical pulses by self-seeding of a gain-switched 1.53 μm semiconductor laser has been proposed and experimentally demonstrated. The configuration consists of a 600 m highly dispersive fiber and an optical loop mirror multiplexer. Four-wavelength optical pulses with a spectral separation of 2.6 nm, a side-mode-suppression ratio of 16 to 20 dB, and a pulse width of 75 ps have been generated. The repetition rate of these pulses has been multiplied to 3.4 GHz, and totally 13.6 Gb/s (4×3.4 Gb/s) pulse signals have been produced. With the optical bit patterns generated from the multiplexer, output pulses with one, two, or four wavelengths at different combinations can be obtained. © 1998 American Institute of Physics.
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