OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 13, Iss. 11 — Nov. 1, 1974
  • pp: 2704–2711

Double-Beam Two-Channel Wavelength-Modulated Reflectometer

W. Kardux and H. J. Krusemeyer  »View Author Affiliations

Applied Optics, Vol. 13, Issue 11, pp. 2704-2711 (1974)

View Full Text Article

Enhanced HTML    Acrobat PDF (877 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



A double-beam wavelength-modulated reflectometer utilizing a single detector and without a reflectivity reference has been described. Separate electronic channels are used for the two wavelengths at which the reflectometer alternatively operates. The gain of one of the channels is controlled by feedback to eliminate the instrumental background. The derivative and conventional reflectivity are measured simultaneously. The influence of the photomultiplier dark current and scattered light on the accuracy and of some design parameters on the SNR have been evaluated. The system has been checked by measuring the derivative and conventional reflectivity spectrum of GaAs.

© 1974 Optical Society of America

Original Manuscript: February 22, 1974
Published: November 1, 1974

W. Kardux and H. J. Krusemeyer, "Double-Beam Two-Channel Wavelength-Modulated Reflectometer," Appl. Opt. 13, 2704-2711 (1974)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. See, e.g., M. Cardona, Modulation Spectroscopy (Academic, New York, 1969).
  2. K. L. Shaklee, J. E. Rowe. Appl. Opt. 9, 627 (1970). [CrossRef] [PubMed]
  3. M. Welkowsky, R. Braunstein, Rev. Sci. Instrum. 43, 399 (1972). [CrossRef]
  4. G. P. Hart, J. A. Neely, R. J. Kearney, Rev. Sci. Instrum. 44, 37 (1973). [CrossRef]
  5. R. R. L. Zucca, Y. R. Shen, Appl. Opt. 12, 1293 (1973). [CrossRef] [PubMed]
  6. R. N. Hager, R. C. Anderson, J. Opt. Soc. Am. 60, 1444 (1970). [CrossRef]
  7. F. R. Stauffer, H. Sakai, Appl. Opt. 7, 61 (1968). [CrossRef] [PubMed]
  8. I. Balslev, Sol. State Commun. 3, 213 (1965); Phys. Rev. 143, 636 (1966). [CrossRef]
  9. R. E. Drews, Bull. Am. Phys. Soc. II 12, 384 (1967).
  10. A. Perregaux, G. Ascarelli, Appl Opt. 7, 2031 (1968). [CrossRef] [PubMed]
  11. G. Bonfiglioli, P. Brovetto, Appl. Opt. 3, 1417 (1964). [CrossRef]
  12. E. Sutter, Optik 38, 73 (1973).
  13. R. R. L. Zucca, J. P. Walter, Y. R. Shen, M. L. Cohen, Sol. State Commun. 8, 627 (1970). [CrossRef]
  14. R. R. L. Zucca, Y. R. Shen, Phys. Rev. 1, 2668 (1970). [CrossRef]
  15. R. Braunstein, M. Welkowsky, in Proc. Tenth Intern. Conf. Phys. Semicond. (edited by S. P. Keller, J. C. Hensel, F. Stern, USAEC Division of Technical Information, Oak Ridge, Tennessee, 1970), p. 439.

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1 Fig. 2 Fig. 3
Fig. 4

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited