A real-time adaptive second order generalized integrator spreading technique suitable for OFDR is proposed to address the drawbacks of low spatial data utilization and complex phase extraction in the equal optical frequency sampling method. By using the discretized SOGI algorithm, the main components and orthogonal components of the original signal are obtained, and the signal phase is obtained through trigonometric calculation to achieve frequency multiplying. Using the phase signal after frequency multiplying for equal optical frequency sampling can improve the distance utilization of the auxiliary interferometer and be implemented on FPGA. Finally, it has been experimentally proven that this technology can break through the original detection distance without changing the optical path and achieving real-time performance of four frames per second. Realize a testing range of 300m with an auxiliary interferometer arm length difference of 150m and spatial resolution of 80μm.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.