Horiguchi M, Ohmori Y, Takata H
Appl Opt. 1980 Sep 15;19(18):3159-67. doi: 10.1364/AO.19.003159.
To study profile dispersion effects on transmission bandwidth in high-bandwidth graded-index fibers, baseband frequency responses of various graded-index fibers with different profile parameters have been characterized in the 0.78-1.50-microm wavelength range. The test graded-index fibers were made by the MCVD technique. Intrinsic intermodal dispersions of these fibers were determined using a combination of a GaAlAs laser and a grating monochromator, a mode-locked Nd:YAG laser, an InGaAsP/InP laser, and stimulated Raman scattering in a single-mode fiber as the light sources. Transmission bandwidth functional dependences on wavelength are presented. The transmission bandwidth of the individual fibers changed by more than 400% within the experimental spectral range. The maximum transmission bandwidth so far observed was 3.74 GHz.km at 1.225-microm wavelength for a fiber with 0.20 N.A. Transmission bandwidth spectra were compared with computer calculated results based on Olshansky's theory.
为了研究分布色散对高带宽渐变折射率光纤传输带宽的影响，已在0.78 - 1.50微米波长范围内对具有不同分布参数的各种渐变折射率光纤的基带频率响应进行了表征。测试用的渐变折射率光纤是采用MCVD技术制造的。这些光纤的本征模间色散是通过结合使用GaAlAs激光器和光栅单色仪、锁模Nd:YAG激光器、InGaAsP/InP激光器以及单模光纤中的受激拉曼散射作为光源来确定的。给出了传输带宽与波长的函数关系。在实验光谱范围内，各光纤的传输带宽变化超过400%。目前观察到的最大传输带宽是在1.225微米波长下，对于数值孔径为0.20的光纤，其值为3.74 GHz·km。将传输带宽光谱与基于奥尔尚斯基理论的计算机计算结果进行了比较。
