CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 6572 > Article
Open Access Paper
16 May 2007 MIT/LL development of broadband linear frequency chirp for high resolution ladar
Kevin W. Holman, David G. Kocher, Sumanth Kaushik
Author Affiliations +
Proceedings Volume 6572, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III; 65720J (2007) https://doi.org/10.1117/12.724272
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States
Abstract
The development of a high-resolution laser radar (ladar) exhibiting sub-mm resolution would have a great impact on standoff identification applications. It would provide biometric identification capabilities such as three-dimensional facial recognition, interrogation of skin pore patterns and skin texture, and iris recognition. The most significant technical challenge to developing such a ladar is to produce the appropriate optical waveform with high fideltiy. One implementation of such a system requires a 1.5-THz linear frequency sweep in 75 &mgr;s. Previous demonstrations of imaging with such waveforms achieved a 1 THz sweep in > 100 ms, and required additional corrections to compensate for sweep nonlinearity. The generation of high fidelity, temporally short frequency-swept waveforms is of considerable interest to the DoD community. We are developing a technique that utilizes a novel method to generate a 1 THz sweep in 50 &mgr;s from a mode-locked laser. As a proof-of-principle demonstration of this technique we have successfully generated a 20 GHz sweep in 1 µs with a fidelity sufficient to produce better than -20 dB sidelobes for a range measurement without using any additional corrections. This method is scalable to produce the entire 1 THz sweep in 50 &mgr;s.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Kevin W. Holman, David G. Kocher, and Sumanth Kaushik "MIT/LL development of broadband linear frequency chirp for high resolution ladar", Proc. SPIE 6572, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications III, 65720J (16 May 2007); https://doi.org/10.1117/12.724272
PROCEEDINGS
 8 PAGES
DOWNLOAD PAPER SAVE TO MY LIBRARY
GET CITATION
Lens.org Logo
CITATIONS
Cited by 9 scholarly publications.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
LIDAR
Terahertz radiation
Mode locking
Point spread functions
Heterodyning
Modulators
Sensors
RELATED CONTENT
High definition 3D imaging lidar system using CCD
Proceedings of SPIE (October 19 2016)
Numerical analysis of linewidth demands in heterodyne lidar
Proceedings of SPIE (October 23 2018)
Modern fibre-optic coherent lidars for remote sensing
Proceedings of SPIE (October 16 2015)
Laser field imaging through Fourier transform heterodyne
Proceedings of SPIE (May 28 1999)
Heterodyne Noise Measurements Of A Microstrip, Waveguide Local Oscillator Modulator
Proceedings of SPIE (September 13 1989)
Technology Aspects Of A Coherent Optical M.A.N.
Proceedings of SPIE (February 05 1990)
Quasioptical system design
Proceedings of SPIE (February 12 2009)
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top