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首页> 外文会议>Conference on Optical Coherence tomography and coherence domain optical methods in biomedicine XXI >Polarization-sensitive plug-in optical module for a Fourier-domain optical coherence tomography system
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Polarization-sensitive plug-in optical module for a Fourier-domain optical coherence tomography system

机译：傅立叶域光学相干断层扫描系统的偏振敏感插件光学模块

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摘要

In this manuscript we communicate a theoretical study on a plug-in optical module to be used within a Fourier-domain optical coherence tomography system (FD-OCT). The module can be inserted between the object under investigation and any single-mode fiber based FD-OCT imaging instrument, enabling the latter to carry out polarization measurements on the former. Similarly to our previous communication1 this is an active module which requires two sequential steps to perform a polarization measurement. Alternating between the two steps is achieved by changing the value of the retardance produced by two electro-optic polarization modulators, which together behave as a polarization state rotator. By combining the rotation of the polarization state with a projection against a linear polarizer it is possible to ensure that the polarization measurements are free from any undesirable polarization effects caused by the birefringence in the collecting fiber and diattenuation in the fiber-based couplers employed in the system. Unlike our previous work, though, this module adopts an in-line configuration, employing a Faraday rotator to ensure a non-reciprocal behavior between the forward and backward propagation paths. The module design also allows higher imaging rates due to the use of fast electro-optic modulators. Simulations have been carried out accounting for the chromatic effects of the polarization components, in order to evaluate the theoretical performance of the module.
机译：在本手稿中，我们在傅立叶域光学相干断层扫描系统（FD-OCT）内传达对插入光学模块的理论研究。该模块可以在调查和任何单模光纤的FD-OCT成像仪器之间插入物体之间，使后者能够对前者进行极化测量。类似于我们之前的通信1，这是一个有源模块，其需要两个顺序步骤来执行偏振测量。通过改变由两个电光偏振调制器产生的延迟的值来实现两个步骤之间的交替，其在一起作为偏振态旋转器。通过将偏振状态的旋转与突出线相结合，可以确保偏振测量没有由收集纤维的双折射引起的任何不期望的偏振效果，并且在所用的纤维基耦合器中的分发器系统。与我们以前的工作不同，该模块采用了一种在线配置，采用法拉第旋转器，以确保前向和向后传播路径之间的非互量行为。由于使用快速电光调制器，模块设计还允许更高的成像率。已经对偏振分量的色差进行了算法进行了算法，以评估模块的理论性能。

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