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10 September 2009 Measurement of frequency swept linearly with Fabry-Perot fiber interferometer
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Abstract
Synthetic aperture imaging ladar (SAIL) used a series of pulses in which the optical frequency was swept linearly in time over a bandwidth greater than several gigahertz. The linearity of such broadly tunable sources is often poor which is leading to phase errors. Many methods are adopted to correct for quadratic and higher-order phase errors such as the reference channel or algorithm for unmatched channel of Aerospace and the reference interferometer of Naval Research Laboratory. If the real value of frequency swept quasi-linearly is measured another direct way to mitigate the waveform linearity problem can be developed. At first the frequency curve is measured with Fabry Perot fiber interferometer. Experiment and results are explained in detail in this paper. The quadratic and higher-order terms of frequency swept are calculated. They may be used to deduce the phase errors directly later. At the same time the wavefront is also measured by a Jamin shearing interferometer through the fringe analysis.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhu Luan, Nan Xu, De'an Liu, Yu Zhou, and Liren Liu "Measurement of frequency swept linearly with Fabry-Perot fiber interferometer", Proc. SPIE 7432, Optical Inspection and Metrology for Non-Optics Industries, 74321A (10 September 2009); https://doi.org/10.1117/12.824662
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