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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 3324–3335

Tunable elastomer-based virtually imaged phased array

Philipp Metz, Hendrik Block, Christopher Behnke, Matthias Krantz, Martina Gerken, and Jost Adam  »View Author Affiliations

Optics Express, Vol. 21, Issue 3, pp. 3324-3335 (2013)

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Virtually imaged phased arrays (VIPAs) offer a high potential for wafer-level integration and superior optical properties compared to conventional gratings. We introduce an elastomer-based tunable VIPA enabling fine tuning of the dispersion characteristics. It consists of a poly-dimethylsiloxane (PDMS) layer sandwiched between silver bottom and top coatings, which form the VIPA’s high reflective and semi-transparent mirror, respectively. The latter also acts as an electrode for Joule heating, such that the optical PDMS resonator cavity tuning is carried out via a combination of thermal expansion and the thermo-optic effect. Analogous to the free spectral range (FSR), based on a VIPA specific dispersion law, we introduce a new characteristic VIPA performance measure, namely the free angular range (FAR). We report a tuning span of one FAR achieved by a 7.2K temperature increase of a 170μm PDMS VIPA. Both resonance quality and tunability are analyzed in numerical simulations and experiments.

© 2013 OSA

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(130.3120) Integrated optics : Integrated optics devices
(250.2080) Optoelectronics : Polymer active devices
(220.1080) Optical design and fabrication : Active or adaptive optics

ToC Category:
Integrated Optics

Original Manuscript: November 15, 2012
Revised Manuscript: January 18, 2013
Manuscript Accepted: January 19, 2013
Published: February 1, 2013

Philipp Metz, Hendrik Block, Christopher Behnke, Matthias Krantz, Martina Gerken, and Jost Adam, "Tunable elastomer-based virtually imaged phased array," Opt. Express 21, 3324-3335 (2013)

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