光子晶体光纤反常色散区的频率转换实验研究  

Frequency conversion in abnormal dispersion region of photonic crystal fiber

作　　者：李立肖[1] 侯蓝田[1] 韩颖[1] 崔海燕[1] 庞辉[1] 闫志伟[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004

出　　处：《燕山大学学报》2010年第4期344-348,共5页Journal of Yanshan University

基　　金：国家自然科学基金重点资助项目(F2008000867;60637010)

摘　　要：利用自制的高非线性光子晶体光纤进行了飞秒激光脉冲传输实验,研究了在不同功率、不同输入波长下高非线性光子晶体光纤的频率转换现象。当输入激光脉冲的中心波长位于光子晶体光纤反常色散区800nm处时,输出光谱向短波方向展宽,其产生的反斯托克斯波强度随输入功率增强逐渐增强;当输入激光脉冲的中心波长在反常色散区不同波长下时,光纤的频率转换效率不同,越接近零色散波长,转换效率越大,当输入脉冲中心波长为760nm时,产生的反斯托克斯波的中心波长为465nm,其强度是抽运波剩余强度的8.1倍,转换效率高达90%。Femtosecond pulses transmit is demonstrated in a highly nonlinear PCF. Erequency conversion in abnormal dispersion region of a highly nonlinear PCF at the different power and wavelength is studied by Femtosecond Laser Pulses. An 800 nm central wavelength of input pulses locates in the abnormal dispersion region of the PCF. The output spectrum spreads to short wavelength, and the anti-stokes emission in output spectrum holds on dominant status gradually when the average power of initial input pulses increases. When the central wavelength of input pulses in the abnormal dispersion region of the PCF is different, the frequency conversion follows the changes, which is bigger as the central wavelength of input pulse is more near to the zero-dispersion wavelength. Especially when central wavelength of input pulses is 760 nm, the central wavelength of anti-stokes wave is 465 nm, the intensity of anti-stokes is 8.1 times the intensity of residual pump energy, and the transform-efficiency exceeds 90%.

关 键 词：光子晶体光纤 飞秒激光脉冲 零色散波长 反常色散区 频率转换 

分 类 号：TN252[电子电信—物理电子学]