Terahertz radar cross‐section characterisation using laser feedback interferometry with quantum cascade laser. Issue 22 (13th October 2015)

• Record Type: Journal Article
• Authors: Lui, H.S.; Taimre, T.; Bertling, K.; Lim, Y.L.; Dean, P.; Khanna, S.P.; Lachab, M.; Valavanis, A.; Indjin, D.; Linfield, E.H.; Davies, A.G.; Rakić, A.D.
• Is Part Of: Electronics letters. Volume 51:Issue 22(2015)
• Page Start: 1774
• Page End: 1776
• Publication Date: 2015-10-13
• Subjects: radar cross‐sections -- laser feedback -- light interferometry -- quantum cascade lasers -- numerical analysis -- measurement by laser beam; terahertz radar cross‐section -- laser feedback interferometry -- radar cross‐section measurements -- terahertz quantum cascade laser -- numerical simulations -- nonlinear interferometric signals -- numerical fitting -- excess phase equation; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2015.2878
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Radar cross‐section (RCS) measurements of complex, large objects are usually performed on scale models so that the measurement is carried out in a well‐controlled environment. The feasibility of RCS measurement using a terahertz (THz) quantum cascade laser (QCL) via laser feedback interferometry is explored. Numerical simulations show that the RCS information embedded in the nonlinear interferometric signals obtained from simple targets can be retrieved through numerical fitting of the well‐known excess phase equation. The method is validated experimentally using a THz QCL and the results are well matched with those obtained from numerical simulations.