Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Light induced fluidic waveguide coupling

Open Access Open Access


We report on the development of an opto-fluidic waveguide coupling mechanism for planar solar concentration. This mechanism is self-adaptive and light-responsive to efficiently maintain waveguide coupling and concentration independent of incoming light’s direction. Vapor bubbles are generated inside a planar, liquid waveguide using infrared light on an infrared absorbing glass. Visible light focused onto the bubble is then reflected by total internal reflection (TIR) at the liquid-gas interface and coupled into the waveguide. Vapor bubbles inside the liquid are trapped by a thermal effect and are shown to self-track the location of the infrared focus. Experimentally we show an optical to optical waveguide coupling efficiency of 40% using laser light through a single commercial lens. Optical simulations indicate that coupling efficiency > 90% is possible with custom optics.

© 2012 Optical Society of America

Full Article  |  PDF Article
More Like This
Thermal phase change actuator for self-tracking solar concentration

E. J. Tremblay, D. Loterie, and C. Moser
Opt. Express 20(S6) A964-A976 (2012)

Proof of principle demonstration of a self-tracking concentrator

Volker Zagolla, Eric Tremblay, and Christophe Moser
Opt. Express 22(S2) A498-A510 (2014)

Self-tracking solar concentrator with an acceptance angle of 32°

Volker Zagolla, Didier Dominé, Eric Tremblay, and Christophe Moser
Opt. Express 22(S7) A1880-A1894 (2014)

Supplementary Material (1)

Media 1: AVI (2871 KB)     

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.

Alert me when this article is cited.

Figures (7)

Fig. 1
Fig. 1 Principle of the opto-fluidic concentrator. (a) Light is focused to a ring inside the waveguide. (b) Once a bubble is generated, light is reflected from the bubble by TIR and coupled into the waveguide.
Fig. 2
Fig. 2 Theoretical target space: a scale invariant volume space that defines all parameters dependent on the coupling efficiency (a) Efficiency > 50%, (b) Efficiency > 90%. The inset in (a) shows our demonstration system while the inset in (b) shows a solution for 100% coupling efficiency (neglecting scattering and Fresnel reflections).
Fig. 3
Fig. 3 Simulation results on the coupling efficiency in an off-axis illumination configuration as a function of the light’s incident angle.
Fig. 4
Fig. 4 Schematic of the setup. Two lasers are co-propagating and focused on the IR absorbing glass.
Fig. 5
Fig. 5 (a) Photograph of the experimental fluidic chamber. The BG39 is clearly visible (blue glass). (b) Photograph showing the bubble and the focus ring for illustrating purposes.
Fig. 6
Fig. 6 (a) Experiment: Bubble size for specific power levels, as a function of time for an existing bubble. (b) Experiment vs. Simulation: Light reaching Detector vs. Bubble size.
Fig. 7
Fig. 7 Illustration of the tracking of a vapor bubble ( Media 1).


Select as filters

Select Topics Cancel
© Copyright 2023 | Optica Publishing Group. All Rights Reserved