Broadband Laser Ranging: Signal Analysis and Interpretation
- Nevada National Security Site, National Security Technologies, LLC
- Lawrence Livermore National Laboratory
- Los Alamos National Laboratory
Broadband laser ranging (BLR) is essentially a spectral interferometer used to infer distance to a moving target. The light source is a mode-locked fiber laser, and chromatic dispersion maps the spectral interference pattern into the time domain, yielding chirped beat signals at the detector. A BLR record is a sequence of these chirped signals, representing consecutive target positions. To infer distance to a target, each underlying pulse envelope must be consistently registered and subtracted despite environmentally-induced variability. Then, nonlinear transformation of the phase is applied to remove the chirp, an FFT is performed to determine the peak frequency of the de-chirped signal, and a calibration factor relating de-chirped frequency to distance results in target position. This article discusses these analysis steps are in detail.
- Research Organization:
- Nevada National Security Site, National Security Technologies, LLC
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- DE-NA0003624
- OSTI ID:
- 1507010
- Report Number(s):
- DOE/NV/25946-3101
- Journal Information:
- Proceedings Volume 10089, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II, Vol. 10089, Issue 0G; Conference: SPIE Photonics West Conference, San Francisco, California, January 28 - February 2, 2017
- Country of Publication:
- United States
- Language:
- English
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