近來光學同調斷層掃描術(OCT)在發展上，由於頻域光學同調斷層掃描術(FD-OCT)在活體生物組織量測上具有快速造影和高靈敏度的特性，逐漸被大家所重視。
在本論文中，我們提出一套新的頻域光學同調斷層掃描術系統應用於相移演算法。藉由極化光的正交特性，我們可以同時記錄到兩組干涉頻譜。這套系統使我們可以消除頻域光學同調斷層掃描術本身具有的自相關雜訊和來自放置於系統上待測物的多層介面所反射而造成多餘的自相干及交相干的訊號，亦可借由此方法來使可量測的範圍加倍。除此之外，由於此系統不需要借由機械式的掃描(M-scan)來達成相移演算法，因此，量測的速度將會加倍而測量結果的準確度比起傳統的頻域光學同調斷層掃描術將較不易受到待測物體及系統本身的震動。
我們亦討論有關待測物的震動和相移的精準度所造成的影響。比較模擬的結果顯示出此系統表現的較傳統的頻域光學同調斷層掃描系統為佳。

Most recent development in optical coherence tomography (OCT) placed its emphasis on Fourier domain implementations for in vivo imaging of biological tissues because of its inherent imaging speed and sensitivity advantages.
In this thesis, we present a novel optical scheme for a phase shifting method of Fourier domain optical coherence tomography (FD-OCT) system. With orthogonal polarization property, two interference patterns can be recorded simultaneously. It is possible to remove the strong autocorrelation noise inherent in FD-OCT and unwanted auto- and cross-coherent terms introduced by the reflections from various optical interfaces present in the system and to double the measurement range with this
method. Furthermore, no mechanical scan for phase shifting (M-scan) is needed, so that the speed of image acquisition will be doubled and the accuracy of the OCT is more affected by the vibration of the sample and the system itself than conventional FD-OCTs.
We also discuss the impact of the vibration of the sample and the accuracy of phase shift. The result of our comparison reveals that the proposed system is better than conventional FD-OCT systems.

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