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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 10 — Apr. 1, 2010
  • pp: 1757–1763

Highly efficient refractive Gaussian-to-tophat beam shaper for compact terahertz imager

Roman Kleindienst, Lothar Moeller, and Stefan Sinzinger  »View Author Affiliations

Applied Optics, Vol. 49, Issue 10, pp. 1757-1763 (2010)

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We describe an efficient and compact terahertz (THz) illumination system as part of an active THz imager. The design and fabrication methods are verified by comparing measurements with wave optical simulations that form a basis for the design of a Gaussian-to-tophat beam shaper. Introducing realistic alignment tolerances in the simulations led to an improved agreement with the experimental data. Furthermore, we propose a method to reduce the alignment effort for THz beam shaping elements by correlating measured results with simulated data of a misaligned system.

© 2010 Optical Society of America

OCIS Codes
(220.2945) Optical design and fabrication : Illumination design
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Optical Design and Fabrication

Original Manuscript: January 6, 2010
Manuscript Accepted: February 14, 2010
Published: March 24, 2010

Roman Kleindienst, Lothar Moeller, and Stefan Sinzinger, "Highly efficient refractive Gaussian-to-tophat beam shaper for compact terahertz imager," Appl. Opt. 49, 1757-1763 (2010)

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  1. J. F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, and D. Zimdars, “THz imaging and sensing for security applications,” Semicond. Sci. Technol. 20, S266-S280 (2005). [CrossRef]
  2. E. R. Mueller, “Terahertz radiation: applications and sources,” Industrial Physicist 9(4), 27-29 (2003).
  3. F. M. Dickey and S. Holswade, “Gaussian beam shaping: diffraction theory and design,” Laser Beam Shaping: Theory and Techniques (CRC, 2000). [CrossRef]
  4. E. Noponen, A. Tamminen, and M. Vaaja, “Design of transmission-type phase holograms for a compact radar-cross-section measurement range at 650 GHz,” Appl. Opt. Vol. 46, 4181-4196 (2007). [CrossRef] [PubMed]
  5. J. F. Johansson and N. D. Whyborn, “The diagonal horn as a sub-millimeter wave antenna,” IEEE Trans. Microwave Theory Tech. 40, 795-800 (1992). [CrossRef]
  6. Virginia Diodes, Inc., “Nominal horn specifications,” http://virginiadiodes.com/VDI/pdf/VDI%20Feedhorn%20Summary%202009_04_30.pdf.
  7. C. Brückner, B. Pradarutti, O. Stenzel, R. Steinkopf, S. Riehemann, G. Notni, and A. Tünnermann, “Broadband antireflective surface-relief structure for THz optics,” Opt. Express 15, 779-789 (2007). [CrossRef] [PubMed]
  8. H. Aagedal, F. Wyrowski, M. Schmid, S. Egner, J. Müller-Quade, and T. Beth, “Analytical beam shaping with application to laser-diode arrays,” J. Opt. Soc. Am. A 14, 1549-1553 (1997). [CrossRef]
  9. R. W. Gerchberg and W. O. Saxton, “A practical algorithm for the determination of phase from image and diffraction plane figures,” Optik (Jena) 35, 237-246 (1972).
  10. S. Sinzinger and J. Jahns, Microoptics, 2nd ed. (Wiley-VCH, 2003). [CrossRef]
  11. S. Stoebenau and S. Sinzinger, “Ultraprecision machining techniques for the fabrication of freeform surfaces in highly integrated optical microsystems,” Proc. SPIE 7426, 742637 (2009).
  12. R. H. Abd El-Maksoud and J. M. Sasian, “Paraxial ghost image analysis,” Proc. SPIE 7428, 742807 (2009). [CrossRef]

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