정현파로 구동되는 PZT 광경로 지연기를 이용한 광 간섭 단층촬영시스템
Optical Coherence Tomography with Sinusoidal-Wave Drive an Optical Delay Line using Piezoelectric Stretcher
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참고문헌
초록
광간섭 단층촬영(OCT)용으로 원통형 압전소자(PZT)와 단일모드 광섬유를 이용한 광경로 지연기를 제작하여 정현파로 구동하고 특성을 분석하였다.제작한OCT시스템은 검침단과 기준단을 대칭 구동하는 이중 광경로 지연방식을 사용하였다. 정현파 구동을 통한 PZT 광경로 지연 방식은 삼각파 구동과 비교하여 입력파형의 첨두 부분에서의 비선형현상을 제거하여 높은 반복성을 나타냄을 보였고,삼각파 구동으로는 불가능했던 부분을 영상화 할 수 있었다
Abstract
We fabricated and characterized an optical delay line for optical coherence tomography (OCT). The delay line was composed of a cylindrical piezoelectric transducer (PZT) and a single mode optical fiber. The OCT system used a duplex scanning optical delay line which was symmetrically driven in the reference and sample arms. We showed that the sinusoidal-wave was superior to a triangular-wave for driving the optical delay line for scanning depth and repeatability.
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