Abstract

The generation of dual-wavelength ultrashort pulses around 1.55μm is attractive for the development of optical time division multiplexing (TDM) and wavelength division multiplexing (WDM) systems. A simple way to generate such pulses is by self injection seeding of a gain-switched Fabry-Perot laser diode (FP-LD) [1-2]. In this method, the repetition frequency or the length of the external cavity have to be adjusted to let the feedback pulses corresponding to the selected wavelengths arrive at the gain switched FP-LD during the pulse build-up time. Another technique is external injection seeding in which the adjustment of feedback loop or the repetition frequency is not needed. However, a rather expensive continuous wave (CW) tunable laser source is usually required [3]. In this work, we demonstrate a simple external injection seeding system where only two economic FP- LDs and two fiber Bragg gratings (FBGs) are employed.

© 2001 EPS