scholarly journals Fiber-optic add-drop device based on a silica microsphere-whispering gallery mode system

1999 ◽  
Vol 11 (6) ◽  
pp. 686-687 ◽  
Author(s):  
Ming Cai ◽  
G. Hunziker ◽  
K. Vahala
Keyword(s):  
Fiber Optic ◽  
Whispering Gallery Mode ◽  
Silica Microsphere ◽  
Whispering Gallery

scholarly journals In-Fiber BaTiO3 Microsphere Resonator for High-Sensitivity Temperature Measurement

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 318
Author(s):  
Chi Li ◽  
Meng Zhu ◽  
Peng Ji ◽  
Cong Xiong ◽  
Changrui Liao
Keyword(s):  
Fiber Optic ◽  
Temperature Response ◽  
High Sensitivity ◽  
Single Mode ◽  
Whispering Gallery Mode ◽  
Transmission Spectra ◽  
Hollow Core ◽  
Polymer Waveguide ◽  
Whispering Gallery ◽  
Core Fiber

A fiber optic whispering gallery mode (WGM) resonator was proposed and realized by integrating an inline polymer waveguide with a microsphere mounted on it. The polymer waveguide with a diameter of 1 μm was printed with femtosecond laser-assisted multiphoton polymerization in a section of a grooved hollow-core fiber, which was sandwiched between two single-mode fibers. Two WGW resonators assembled with microspheres of different sizes were prepared. The transmission spectra of those stimulated WGMs were investigated both in simulation and experimentally. The temperature response of the resonators was particularly studied, and a linear sensitivity of −593 pm/°C was achieved from 20 °C to 100 °C.

scholarly journals Broadband Frequency-Tunable Whispering-Gallery-Mode Superradiant Light from Quantum Dots in Colloidal Solution

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Mohamad S. AlSalhi ◽  
Saradh Prasad ◽  
Mamduh J. Aljaafreh ◽  
Ahmad H. S. Othman
Keyword(s):  
Quantum Dots ◽  
Pump Energy ◽  
Tunable Laser ◽  
Spectral Width ◽  
Whispering Gallery Mode ◽  
Silica Microsphere ◽  
High Q ◽  
Whispering Gallery ◽  
Liquid Laser ◽  
Frequency Tunable

We examine superradiant (SR) light or amplified spontaneous emission (ASE) from a whispering-gallery-mode (WGM) laser comprising various sized (CdSe) ZnS quantum dots (QDs) in colloidal liquid. Laser-induced fluorescence (LIF) with a full width at half maximum (FWHM) of 40 nm is observed when the colloidal QD system is pumped with 2 mJ of laser light at 355 nm (3rd harmonic of Nd:YAG laser). Under optimal conditions of pump energy and focusing, ASE at 520 nm with a bandwidth of Δλ=8 nm (FWHM) and divergence of 9 mrad is observed. When the QDs are embedded on a high-Q factor silica microsphere ((functionalized with an amine), SMA), they generate WGMs with random peak distributions. Finally, when all the QDs embedded in SMAs are mixed and placed in a cuvette, we obtain a “WGM laser” that is almost continuously tunable from 520 nm to 630 nm with a spectral width less than 2 nm (FWHM) in the WGM and less than 1.2 nm in the cavity mode. We believe that this is the first report on a frequency tunable laser obtained using (CdSe) ZnS QDs embedded in an SMA, exhibiting an efficiency of 0.06%.

A STRUCTURE FOR COUPLING WHISPERING GALLERY MODE WITH SURFACE PLASMONS

2010 ◽  
Vol 19 (04) ◽  
pp. 811-817
Author(s):  
KENZO YAMAGUCHI ◽  
MASAMITSU FUJII ◽  
MITSUO FUKUDA
Keyword(s):  
Surface Plasmons ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Silver Film ◽  
Three Dimensional ◽  
Whispering Gallery Mode ◽  
Silica Microsphere ◽  
Whispering Gallery ◽  
Novel Structure ◽  
Difference Time

The three-dimensional finite-difference time-domain method was used to demonstrate a novel structure for coupling whispering gallery mode (WGM) with surface plasmons (SPs). As for this structure, a micrometer-sized optical resonator composed of a silver film coated on a silica microsphere containing apertures is set on a glass substrate. The SPs couple with higher-order WGM, and their intensity is clearly enhanced by this structure.

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