All-Optical Logic AND in a SOA-Based Mach-Zehnder Inteferometer

摘要

PURPOSE: An all optical AND logic operation method of a Mach-Zehnder interferometer type all optical wavelength converter is provided, which realizes a ultra high speed logic operator having a compact size and a small input intensity using an XPM wavelength converter constituted with a semiconductor optical amplifier of Mach-Zehnder interferometer type. CONSTITUTION: The configuration of the method comprises a mode locked laser(100), and an attenuator(120) attenuating an optical output, and a multiplexer(MUX)(140), and the first optical delay line(160) delaying a speed of the optical output. A 3-dB optical fiber coupler(180) separates the optical intensity into a ratio of 50:50, and a polarization controller(200) controls a polarization state to obtain a maximum optical wavelength efficiency. The second optical delay line(220) delays the speed of the optical output, and an optical isolator(240) transmits the optical wavelength. The configuration also comprises an XPM wavelength converter(260), an erbium doped fiber amplifier(EDFA)(280), a wavelength filter(300) and a signal analyzer(320).