DETUNING ADJUSTABLE MULTIWAVELENGTH MQW-DFB LASER ARRAY GROWN BY EFFECTIVE-INDEX QUANTUM ENERGY CONTROL SELECTIVE-AREA MOVPE

A multiwavelength MQW DFB laser array with novel structure is described. Oscillation wavelength and gain peak wavelength were simultaneously controlled on the same epitaxial wafer by using modulated grown thicknesses of selectively grown InGaAs/InGaAsP/InP MQW active waveguides. The laser array with constant-pitch built-in corrugation fabricated by a simple DFB laser process demonstrated 10.1 nm controllable range for lasing wavelength and 45 nm for gain peak wavelengths, with uniform lasing properties and narrow spectral linewidths. The technique is attractive for light sources used in WDM/FDM applications.