激光与光电子学进展, 2009, 46 (12): 124, 网络出版: 2009-12-17
用于光学相干层析的超连续光纤光源研究
Research on Supercontinuum Fiber Source for Optical Coherence Tomography System
光电子学 超连续光谱 光纤匹配 光学相干层析 optoelectronics supercontinuum spectrum fiber-matched optical coherence tomography
摘要
利用亚皮秒脉冲光源抽运由不同特性光纤级联而成的混合非线性光纤来产生超连续谱,实验发现第一段被抽运光纤的色散和非线性特性最大程度上影响了光谱展宽程度和功率谱平坦度,第二段被抽运光纤可以影响短波一侧光谱的平坦程度。在高非线性光纤(HNLF)后接入色散位移光纤(DSF)进行谱型优化,在抽运120 m HNLF+4570 m DSF+2040 m标准单模光纤(SMF)时得到约1300 nm 处3 dB 谱宽为140.6 nm的宽带光谱。用该光源作为光学相干层析系统光源,可以在生物体探测窗口约1300 nm 处达到小于4.1 mm 的纵向分辨率。
Abstract
The supercontinuum (SC) was generated from the hybrid nonlinear fiber containing of fibers with different characteristics. It is showed that the spectrum quality is affected by the dispersion and nonlinear characteristics of the first pumped fiber. The flatness of spectrum on the short wavelength side is affected by the characteristic of the second segment fiber. Dispersion shifted fiber (DSF) is connected after highly nonlinear fiber (HNLF) to optimize spectral shape. Widely broadened SC spectra is generated in the combination of 120 m HNLF+4570 m DSF +2040 m single mode fiber (SMF). 140.6 nm,3 dB bandwidth spectrum around 1300 nm is obtained. Below 4.1 mm Iongitudinal resolution could be obtained around 1300 nm by using this SC spectrum as the light source of optical coherence tomography system.
郭以平, 王肇颖, 贾东方, 张蕾, 王永福. 用于光学相干层析的超连续光纤光源研究[J]. 激光与光电子学进展, 2009, 46(12): 124. Guo Yiping, Wang Zhaoying, Jia Dongfang, Zhang Lei, Wang Yongfu. Research on Supercontinuum Fiber Source for Optical Coherence Tomography System[J]. Laser & Optoelectronics Progress, 2009, 46(12): 124.