Slow-light-based modulator and transmitter

Toshihiko Baba, Keisuke Kawahara

Keisuke Kuroki, Go Hirano, Koyama Fumio

王甫 Wang Fu, 何志坚 He Zhijian

Liu Yun-hon

In recent years,researches about the controllable group velocity of light propagation are very popular and have made many progresses.But the researches about continuous adjusting on the speed of the light are not mature.As an attempt to avoid disadvantage,the authors designed a new type experiment to adjust the speed of light in the Erbium-doped fiber with CPO technology.Utilize ElvisⅡto design a signal source,modulate the Transmitter Module by using LabVIEW,and generate optical signals that meet the needs of the experiment.Then the signal passing by Erbium-doped fiber can be collected by the data receiver and transferred to PC.After calculating and processing,the time delay and wave forms can be observed on LabVIEW interface.Tests on the experiment system testify that the system can run stably and have well continuous adjustable on the speed of the light.

Yundong Zhang, Huaiyin Su, Yongfeng Wu +3 more

We theoretically demonstrate the transmittion spectra and dispersion characteristics based on the electromagnetically induced transparency like effect in the nested fiber double-ring resonator with the transfer matrix theory; the system which are connected by three directional couplers consists of two inner rings, one outer ring and one straight waveguide. The simulation results show that the tunable group delay can be realized by changing the coupling coefficients. In the NDRR coupled Mach-Zehnder interferometer system, we obtained fast light and slow light simultaneously. By adjusting appropriate parameters, we can archive flat band group delay curve that has a profound application in optical interferometer, optical buffer, optical filter, optical modulator, dynamic or static optical sensing field.

Jesper Mørk