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Spectral Shaping in Rapid Scanning Optical Delay Line of Optical Coherence Tomography |
| WU Ji-Gang;XUE Ping;SUN Shan;GUO Ji-Hua |
| Key Laboratory of Atomic and Molecular Nano Sciences of Ministry of Education, Department of Physics, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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WU Ji-Gang, XUE Ping, SUN Shan et al 2003 Chin. Phys. Lett. 20 2172-2174 |
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Abstract A small spatial optical filter is put into the rapid-scanning optical delay line (RSOD) to shape the spectrum of the reference beam in optical coherence tomography (OCT). The experimental results show that the longitudinal resolution can be improved by a factor of 81% with this method, while at the same time, the signal-to-noise ratio of the OCT system is not much affected. This method can be used in OCT systems that use RSOD as the reference arm with a light source of superluminescent diodes, femtosecond lasers and crystal fibre as well.
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| Keywords:
42.62.Be
42.25.Kb
42.25.Hz
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Published: 01 December 2003
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