Ultrafast ranging lidar based on real-time Fourier transformation
Optics Letters, Vol. 34, Issue 14, pp. 2108-2110 (2009)
http://dx.doi.org/10.1364/OL.34.002108
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Abstract
Real-time Fourier-transformation-based ranging lidar using a mode-locked femtosecond fiber laser is demonstrated. The object signal and the reference signal are guided from a fiber Mach–Zehnder interferometer into a dispersive element. The two optical pulses extend and overlap with each other temporally, which yields a microwave pulse on the photodetector with its frequency proportional to the time delay between the two signals. The temporal interferograms are transformed from the time domain into the frequency domain using a time-to-frequency conversion function obtained in the calibration process. The Fourier transform is used in the data processing. A range resolution of 334 nm at a sampling rate of 48.6 MHz over a distance of 16 cm is demonstrated in the laboratory.
© 2009 Optical Society of America
OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(140.3510) Lasers and laser optics : Lasers, fiber
(140.4050) Lasers and laser optics : Mode-locked lasers
(280.3400) Remote sensing and sensors : Laser range finder
(320.7160) Ultrafast optics : Ultrafast technology
ToC Category:
Lasers and Laser Optics
History
Original Manuscript: May 14, 2009
Manuscript Accepted: May 26, 2009
Published: July 7, 2009
Citation
Haiyun Xia and Chunxi Zhang, "Ultrafast ranging lidar based on real-time Fourier transformation," Opt. Lett. 34, 2108-2110 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-14-2108
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