Iraj Sadegh Amiri
University of Malaya (UM), Malaysia
Title: Generation of tunable dual-wavelength laser by filtering of mode-locked laser using silicon-based microring resonator
Biography
Biography: Iraj Sadegh Amiri
Abstract
Generation of dual-wavelength fiber lasers (DWFLs) has attracted many research interests recently. We demonstrate a stable tunable dual-wavelength erbium-doped fiber laser generated by launching mode-locked laser into an add-drop microring resonator. Two Silicon-based high index contrast microring resonators with Q-factors of 1.2 ×105 and 0.6 ×105 have been used as add-drop filters independently. The two silicon oxynitride (SiOxNy) microring resonators have different diameters and used as narrow band filter for the generation of stable tunable dual-wavelength lasers with variable free spectral range (FSR) accordingly. As a result, multi-wavelength generation was achieved and demonstrated both theoretically and experimentally with free spectral range (FSR) of 0.202 and 0.404 nm corresponding to the microrings’ diameter of D=2.54 and D=1.27 mm. A high resolution tunable band pass filter (TBPF) and FBG are then used to filter out switchable and tunable dual-wavelength signals. The dual-wavelength fiber laser (DWFL) with different FSR from 0.404 to 3.232 nm as an integer coefficient of minimum obtained FSR presents. The resulting dual-wavelength output had a side-mode suppression ratio (SMSR) of more than 30 dB. Therefore, the microring resonator can be readily integrated into a photonics integrated chip (PIC) for multifunctional applications as the achieved FSR is in linear relation with the ring resonators’ diameter.