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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 10 — Apr. 1, 2012
  • pp: 1532–1539

Fast response varifocal lenses using KTa1xNbxO3 crystals and a simulation method with electrostrictive calculations

Tadayuki Imai, Shogo Yagi, Seiji Toyoda, Jun Miyazu, Kazunori Naganuma, Sohan Kawamura, Masahiro Sasaura, and Kazuo Fujiura  »View Author Affiliations

Applied Optics, Vol. 51, Issue 10, pp. 1532-1539 (2012)

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We fabricated cylindrical varifocal lenses with fast responses by using the strong Kerr effect of KTa1xNbxO3 (KTN) single crystals. We observed focus shifts of up to 87 mm with the assistance of a 250 mm focal length lens, which corresponds to a focus shift from infinity to 720 mm by the KTN lens itself. The response time was as fast as 1 μs. We also present a simulation method for calculating refractive index distributions in KTN single crystals, which is essential when designing the lens. The method is characterized by the strain contribution, which has not conventionally been typical of electro-optic simulations. We used this method to explain the refractive index modulations that are characteristic of the varifocal lenses.

© 2012 Optical Society of America

OCIS Codes
(160.2100) Materials : Electro-optical materials
(230.2090) Optical devices : Electro-optical devices
(250.0250) Optoelectronics : Optoelectronics

ToC Category:

Original Manuscript: November 17, 2011
Manuscript Accepted: December 30, 2011
Published: March 28, 2012

Tadayuki Imai, Shogo Yagi, Seiji Toyoda, Jun Miyazu, Kazunori Naganuma, Sohan Kawamura, Masahiro Sasaura, and Kazuo Fujiura, "Fast response varifocal lenses using KTa1−xNbxO3 crystals and a simulation method with electrostrictive calculations," Appl. Opt. 51, 1532-1539 (2012)

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