Fiber Optics in Medicine Module

Lowe, Mary; Donaldson, Nancy; Spiro, A. G.; Gosselin, C. M.; Nadeau, Mark T.

doi:10.15766/mep_2374-8265.10292

Cited by 1 publication

(1 citation statement)

References 8 publications

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“…The reason for this was the lack of alignment between the crystal and the optical fiber axis. As shown in Figure 7 a, the light that can enter an optical fiber is limited to an acceptance cone defined by the acceptance angle β [ 29 ]. If a white light beam emitted through an optical fiber encounters a photonic crystal capable of Bragg diffraction (i = r) tilted at an angle, t ( Figure 7 b), it is diffracted and reflected at angles related to the wavelength.…”

Section: Resultsmentioning

confidence: 99%

Shaping in the Third Direction: Self-Assembly of Convex Colloidal Photonic Crystals on an Optical Fiber Tip by Hanging Drop Method

Sandu,

Antohe,

Fleaca

et al. 2023

Polymers

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High-quality convex colloidal photonic crystals can be grown on the tip of an optical fiber by self-assembly using the hanging drop method. They are convex-shaped, produce the diffraction of reflecting light with high efficiency (blazing colors), and have a high curvature. The convex colloidal crystals are easily detachable and, as free-standing objects, they are mechanically robust, allowing their manipulation and use as convex reflective diffraction devices in imaging spectrometers. Currently, the same characteristics are obtained by using gratings-based structures. The optical fiber/colloidal crystal interface is disordered; thus, no light diffraction can be registered. The ordering at this interface was highly increased by forming a polystyrene spacer on the optical fiber tip, which served as a self-assembly substrate for silica colloid, as a mechanical bond between the fiber and the crystal, and as a filler reservoir for an inverse-opal synthesis. The silica opal-like grown on the optical fiber tip can be transformed into a high-quality polystyrene (blazing colors) inverse-opal by using the polystyrene spacer as a filler. We found that the colloidal crystal axisymmetric self-assembles onto the optical fiber tip only if a maximum volume of the colloid drop is settled on a flat end of the polystyrene spacer.

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Section: Resultsmentioning

confidence: 99%