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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 15 — Jul. 29, 2013
  • pp: 17760–17768

Kovacs effect enhanced broadband large field of view electro-optic modulators in nanodisordered KTN crystals

Yun-Ching Chang, Chao Wang, Shizhuo Yin, Robert C. Hoffman, and Andrew G. Mott  »View Author Affiliations

Optics Express, Vol. 21, Issue 15, pp. 17760-17768 (2013)

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The unique physical effect-Kovacs effect is explored to enhance the performance of EO modulators by employing the non-thermal equilibrium state nanodisordered KTN crystals created by super-cooling process, which can have a significant 3.5 fold increase in quadratic electro-optic coefficient. This enables to reduce the switching half wave voltage (almost by half) so that a broadband (~GHz range) and large field of view (+/−30 deg) electro-optic modulator can be realized with much lowered driving power, which can be very useful for a variety of applications: laser Q-switches, laser pulse shaping, high speed optical shutters and modulating retro reflectors.

© 2013 OSA

OCIS Codes
(120.6810) Instrumentation, measurement, and metrology : Thermal effects
(160.2100) Materials : Electro-optical materials
(160.3220) Materials : Ionic crystals
(190.3270) Nonlinear optics : Kerr effect
(260.1180) Physical optics : Crystal optics
(260.1440) Physical optics : Birefringence
(250.6715) Optoelectronics : Switching

ToC Category:

Original Manuscript: April 26, 2013
Revised Manuscript: July 7, 2013
Manuscript Accepted: July 8, 2013
Published: July 18, 2013

Yun-Ching Chang, Chao Wang, Shizhuo Yin, Robert C. Hoffman, and Andrew G. Mott, "Kovacs effect enhanced broadband large field of view electro-optic modulators in nanodisordered KTN crystals," Opt. Express 21, 17760-17768 (2013)

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