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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 14 — Jul. 2, 2012
  • pp: 16033–16038

Experimental studies of completely closed optical cavities enclosed with total-internal-reflection walls

Tetsuro Kobayashi  »View Author Affiliations

Optics Express, Vol. 20, Issue 14, pp. 16033-16038 (2012)

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In our previous work we proposed the completely closed optical cavity in which light rays with arbitrary directions are completely confined using total internal reflections by a single wall made of a transparent medium. Recently we have succeeded in the experimental confirmation of our proposal. Here, we will demonstrate the experimental results using a prototype cavity composed of GaP. In the cave 640nm LED lights are confined and leakage is less than 10-3. Also, external LED lights are rejected almost 99.9% by the single wall and cannot enter in the cave. Due to the high absorption loss of GaP the Q factor of the cavity is suppressed down and is estimated to be 1.4x106. The higher Q (~109) is expected if the lower loss (>1%/cm) materials are usable. This device will be useful for many applications such as laser cavities, optical filters, tanks storing natural solar light, micro darkrooms, etc.

© 2012 OSA

OCIS Codes
(080.2740) Geometric optics : Geometric optical design
(130.0130) Integrated optics : Integrated optics
(140.4780) Lasers and laser optics : Optical resonators
(230.0230) Optical devices : Optical devices

ToC Category:
Integrated Optics

Original Manuscript: April 26, 2012
Revised Manuscript: June 11, 2012
Manuscript Accepted: June 25, 2012
Published: June 29, 2012

Tetsuro Kobayashi, "Experimental studies of completely closed optical cavities enclosed with total-internal-reflection walls," Opt. Express 20, 16033-16038 (2012)

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