| The conventional techniques for all-optical wavelength conversion require high optical power for achieving adequate nonlinear phase shift. In this thesis, we describe the theoretical and experimental results for the low power all-optical wavelength conversion by employing a new technique of dual-wavelength injection locking an Fabry-Perot (FP) laser diode. The method is simple to implement by using a commercially available double-channel planar-buried heterostructure (DC-PBH) FP laser.; Experiments demonstrated that this dual-wavelength injection-locking wavelength converter can perform low power wavelength conversion (∼0.46mW) of 3Gb/s 231-1 pseudorandom signal with a wavelength range of 38nm (from 1526nm to 1564nm) in more than 10dB extinction ratio. The wavelength converted signals were chirp-reduced and can propagate through 25km to 50km (without amplification) with bit-error rates of the order 10−10 s−1 and 10−9s−1 respectively, thus fulfils the standard for 3R repeater distance of 40km.; Some new applications are proposed and demonstrated by modifying this dual-wavelength injection-locking wavelength converter, these are (i) all-optical device for time-division demultiplexing with simultaneous wavelength conversion, (ii) all-optical one-to-three wavelength conversion, (iii) high frequency pulse-train generation by stimulated relaxation oscillation, (iv) wavelength tunable 10Gb/s chirp reduced pulse generation, and (v) all optical modulation.; Furthermore, the theory of chirped pulse self-phase modulation (CPSPM) was proposed in this thesis. By employing this CPSPM technique, a low power scheme for the measurements of nonlinear index n2 in dispersion-shifted fiber (DSF) and an InGaAsP/InP waveguide were demonstrated. Since this method can resolve small nonlinear phase shift by self-phase modulation, the peak power required for measuring the 1.6km DSF was only 245mW and the corresponding maximum phase shift was 0.3π. The n2 of DSF measured by this CPSPM was 2.634 × 10−20 m2/W compared to the reported value 2.6 × 10−20m2/W. Therefore this method can be used for the design of wavelength converter that employing nonlinear effect (e.g. nonlinear optical loop mirror NOLM). (Abstract shortened by UMI.)... |
