Olshansky R
Appl Opt. 1976 Nov 1;15(11):2773-7. doi: 10.1364/AO.15.002773.
Leaky mode attenuation coefficients for graded index optical fibers are derived using the WKB approximation. For the case of a parabolic index profile, the attenuation coefficients for explicitly evaluated and used to calculate the leaky mode contribution to near field and attenuation measurements. Failure to observe the expected leaky mode contributions in several graded index fibers is interpreted as evidence for the presence of an additional loss mechanism.
采用WKB近似推导了渐变折射率光纤的泄漏模衰减系数。对于抛物线折射率分布的情况，明确计算出衰减系数并用于计算泄漏模对近场和衰减测量的贡献。在几根渐变折射率光纤中未能观察到预期的泄漏模贡献，这被解释为存在额外损耗机制的证据。
