Experimental demonstration of directly modulated buried heterostructure DFB semiconductor laser based on reconstruction equivalent chirp technique

Abstract

A directly modulated buried heterostructure distributed feedback (DFB) semiconductor laser based on the reconstruction equivalent chirp (REC) technique in the 1.3 μm wavelength domain is experimentally demonstrated. The packaged laser shows a good single longitudinal mode (SLM) property, with the side mode suppression ratio (SMSR) higher than 40 dB when the injection current is higher than 20 mA, as the threshold current is 10 mA. The direct modulation performance of the laser is also delightful, with the modulation bandwidth up to 10GHz at a low injection current (40mA), and the measured spurious free dynamic range (SFDR) up to 86 dB·Hz2/3.