Lajunen Hanna, Torres-Company Víctor, Lancis Jesús, Friberg Ari T
Departamento de Optica, Universidad de Valencia, ES-46100 Burjasot, Spain.
J Opt Soc Am A Opt Image Sci Vis. 2009 Apr;26(4):1049-54. doi: 10.1364/josaa.26.001049.
We propose a fourth-order interference scheme for optical coherence tomography operating with broadband incoherent (or quasi-incoherent) light. It is shown that using this proposal, an axial resolution improvement by a factor of sqrt 2 and a better sensitivity for weakly reflecting samples are obtained than with the standard second-order correlation scheme. From a practical perspective, we suggest the use of broadband Q-switched pulses and performing ultrafast intensity correlation with a nonlinear crystal. The global performance of our proposal is illustrated by means of numerical simulations.
我们提出了一种用于光学相干断层扫描的四阶干涉方案，该方案采用宽带非相干（或准非相干）光运行。结果表明，与标准的二阶相关方案相比，采用该方案可将轴向分辨率提高到√2倍，并且对弱反射样本具有更好的灵敏度。从实际角度来看，我们建议使用宽带调Q脉冲，并与非线性晶体进行超快强度相关。我们通过数值模拟说明了该方案的整体性能。
