带有增益的单微环谐振器的光速控制行为  

Control of light speed in single-ring microresonators with gain

作　　者：郝影[1] 孔梅[1] 卢俊[1] 

机构地区：[1]长春理工大学理学院物理系,吉林长春130022

出　　处：《中国光学与应用光学》2009年第6期482-488,共7页Chinese Optics and Applied Optics Abstracts

摘　　要：带有损耗的光波导微环谐振器在实现光速控制时存在输出脉冲能量损耗大、脉冲形状畸变严重等问题。基于带有增益和带有损耗的微环谐振器的传输特性之间的对称性,计算分析了单微环谐振器的透射率、群折射率和群速度色散等特性,分析了增益和损耗对微环谐振器输出特性影响的机制。计算了带有增益的微环谐振器的光速控制行为,并与带有损耗的微环谐振器进行对比。结果显示,带有增益的微环谐振器输出脉冲不分裂且有较大的输出强度。脉冲延迟量和超前量比损耗系统大,可用于光速控制,克服了微环带有损耗时产生的光强损耗和脉冲畸变。Using single-ring microresonators with loss to realize the light speed control encounters difficulties of heavy light loss and serious pulse distortion. Based on the symmetry between the transfer characteristics of resonators with loss and with gain, the transmission, group index, and group velocity dispersion of a single-ring microresonator are calculated and analyzed. The action mechanism of the loss and gain on the transfer characteristics of the micro-ring resonator is demonstrated. The light speed control behavior of the resonator with gain is calculated and compared with that of the resonator with loss. Calculation results indicate that the resonator with gain can produce the nonsplitted pulses with higher intensities and their pulse delay and pulse advancement are greater than those of the resonator with loss. These results show that the resonator with gain can be used to control the speed of light and to overcome the pulse loss and distortion in dissipative resonators.

关 键 词：光波导 微环谐振器 快光 慢光 脉冲畸变 

分 类 号：O436[机械工程—光学工程] TN256[理学—光学]