The coupling cavity theory is used to analyze the impact of high side mode suppression ratio （SMSR） on fiber grating external cavity semiconductor lasers （FGECSL）. The high SMSR and high stable frequency FGECSLs w...The coupling cavity theory is used to analyze the impact of high side mode suppression ratio （SMSR） on fiber grating external cavity semiconductor lasers （FGECSL）. The high SMSR and high stable frequency FGECSLs were obtained by experiment. The center wavelength is 974 nm, SMSR is 45 dB, the center wavelength change rate reaches 3.08 ppm/℃ in the temperature range of -20 to 80 ℃.展开更多
Fluctuating polarization state-of-light in the optical loop is an important factor that seriously influences the output performance of a multi-carrier source based on re-circulating frequency shifter （RFS）. The reas...Fluctuating polarization state-of-light in the optical loop is an important factor that seriously influences the output performance of a multi-carrier source based on re-circulating frequency shifter （RFS）. The reason for output spectrum instability when no polarization controller （PC） is present in the loop is analyzed theoretically. Numerical simulations for the output spectra of the multi-carrier source with and without PC are conducted, and the trajectories of the several frequency components polarization states on the Poincare sphere with and without PC are compared. The results show that the performance of multi-carrier source based on a RFS can be improved effectively by adjusting the PC in the configuration properly.展开更多
文摘The coupling cavity theory is used to analyze the impact of high side mode suppression ratio （SMSR） on fiber grating external cavity semiconductor lasers （FGECSL）. The high SMSR and high stable frequency FGECSLs were obtained by experiment. The center wavelength is 974 nm, SMSR is 45 dB, the center wavelength change rate reaches 3.08 ppm/℃ in the temperature range of -20 to 80 ℃.
基金supported by the Chinese Universities Scientific Fund (No. BUPT 2011RC009)the BUPT Excellent Ph.D. Students Foundation (No. CX201121)the Research Fund for the Doctoral Program of Higher Education (No. 20110005110014)
文摘Fluctuating polarization state-of-light in the optical loop is an important factor that seriously influences the output performance of a multi-carrier source based on re-circulating frequency shifter （RFS）. The reason for output spectrum instability when no polarization controller （PC） is present in the loop is analyzed theoretically. Numerical simulations for the output spectra of the multi-carrier source with and without PC are conducted, and the trajectories of the several frequency components polarization states on the Poincare sphere with and without PC are compared. The results show that the performance of multi-carrier source based on a RFS can be improved effectively by adjusting the PC in the configuration properly.
