Precise control of broadband frequency chirps using optoelectronic feedback
Abstract
We demonstrate the generation of wideband frequency sweeps using a semiconductor laser in an optoelectronic feedback loop. The rate and shape of the optical frequency sweep is locked to and determined by the frequency of a reference electronic signal, leading to an agile, high coherence swept-frequency source for laser ranging and 3-D imaging applications. Using a reference signal of constant frequency, a transformlimited linear sweep of 100 GHz in 1 ms is achieved, and real-time ranging with a spatial resolution of 1.5 mm is demonstrated. Further, arbitrary frequency sweeps can be achieved by tuning the frequency of the input electronic signal. Broadband quadratic and exponential optical frequency sweeps are demonstrated using this technique.
Additional Information
© 2009 Optical Society of America. Received 23 Apr 2009; revised 14 Aug 2009; accepted 19 Aug 2009; published 25 Aug 2009. This work was supported in part by DARPA's MTO office (Dr R. Esman) and in part by the Caltech Lee Center for Advanced Networking.Attached Files
Published - Satyan2009p5967Opt_Express.pdf
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Additional details
- Eprint ID
- 16141
- Resolver ID
- CaltechAUTHORS:20091001-095735947
- DARPA
- Caltech Lee Center for Advanced Networking
- Created
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2009-10-06Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field