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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 7 — Mar. 1, 2009
  • pp: C86–C91

Dual-mode single-crystal photoelastic modulator and possible applications

Rok Petkovšek, Ferdinand Bammer, Dieter Schuöcker, and Janez Možina  »View Author Affiliations


Applied Optics, Vol. 48, Issue 7, pp. C86-C91 (2009)
http://dx.doi.org/10.1364/AO.48.000C86


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Abstract

A new type of acousto-optic device based on a Li Ta O 3 crystal is presented. A harmonic voltage with a proper frequency applied to the piezoelectric Li Ta O 3 crystal generates mechanical oscillations in the material. Due to photoelasticity, an artificial modulated birefringence is induced by this oscillation. By using a properly adjusted polarizer and analyzer, the transmission of trough-going polarized light can be modulated. By simultaneous excitation of two modes, an advanced optical response can be achieved. For the applications presented here, the first shear eigenmode must have exactly three times the frequency of the first longitudinal eigenmode.

© 2008 Optical Society of America

OCIS Codes
(140.3540) Lasers and laser optics : Lasers, Q-switched
(230.4110) Optical devices : Modulators

History
Original Manuscript: July 30, 2008
Revised Manuscript: November 4, 2008
Manuscript Accepted: November 4, 2008
Published: December 3, 2008

Citation
Rok Petkovšek, Ferdinand Bammer, Dieter Schuöcker, and Janez Možina, "Dual-mode single-crystal photoelastic modulator and possible applications," Appl. Opt. 48, C86-C91 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-7-C86


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References

  1. J. C. Kemp, “Piezo-optical birefringence modulators: new use for a long-known effect,” J. Opt. Soc. Am. 59, 950-955 (1969).
  2. J. C. Kemp, “Hinds Instruments,” www.hindsinstruments.com.
  3. F. Bammer, B. Holzinger, and T. Schumi, “A single crystal photo-elastic modulator,” Proc. SPIE 6469, 64690O (2007). [CrossRef]
  4. F. Bammer and R. Petkovsek, “Q-switching of a fiber laser with a single crystal photo-elastic modulator,” Opt. Express 15, 6177-6182 (2007). [CrossRef] [PubMed]
  5. F. J. Nye, Physical Properties of Crystals (Oxford Science, 1984), Chap. 14 .
  6. K. K. Wong, ed., Properties of Lithium Niobate (INSPEC, Institution of Electrical Engineers, London, 2002), Chap. 8.
  7. F. Bammer, B. Holzinger, and T. Schumi, “Time multiplexing of high power laser diodes with single crystal photo-elastic modulators,” Opt. Express 14, 3324-3332 (2006). [CrossRef] [PubMed]
  8. T. A. Maldonado and M. Bass, Handbook of Optics (McGraw-Hill, 1995).

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