A new dynamic model is developed for simulating the widely tunable grating assisted codirectional couplerwith rear sampled grating reflector (GCSR) lasers.The gain section of the device is calculated in timedomainusing traveling-wave method,while the transmission spectrum of the coupler and the reflectionspectrum of the reflector are firstly simulated in frequency-domain,and then transformed into time-domainvia digital filter approach.Both static and dynamic performances based on this model agree well withthe published results.Compared with previous works,this new model is more efficient and applicable,especially in the dynamic simulation.
The sampled-grating distributed Bragg reflector(SGDBR) laser is a typical and important photonic integrated device,and has potential wide application to agile optical networks.A new dynamic model for this device has been developed,which combines the traveling-wave method for the active region and the transfer-matrix method for the passive sections into a single procedure.The behaviors of wave-length switching of the SGDBR laser,which include the transient spectrum and mode competition,have been studied in detail using this model.A new efficient way has been proposed to improve the wavelength switching performance only by increasing the coupling coefficients without changing the carrier density.
