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Tunable single mode lasing from an on-chip optofluidic ring resonator laser
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10.1063/1.3554362
/content/aip/journal/apl/98/6/10.1063/1.3554362
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/6/10.1063/1.3554362
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic of a coupled OFRR laser. The arrows inside the ring resonator show light propagation direction. (b) Image of the coupled OFRR formed on the PDMS substrate. The diameter of the upper (lower) ring is 290 . The gaps between the lower ring and the waveguide and between the two rings are 2 and , respectively. The two rings are filled with dye dissolved in TEG, whereas the waveguide is filled with TEG alone. (c) Scanning electron microscopic image of the gap between the two rings. (d) Photograph of the coupled OFRR during laser operation. The laser emission is coupled into the liquid waveguide and collected at its distal end. Dashed lines show the waveguide position.

Image of FIG. 2.
FIG. 2.

(a) Lasing spectra of the coupled OFRR laser described in Fig. 1(b) at various pump energy densities. Curves are vertically shifted for clarity. (b) Intensity of the laser emission at 569.9 nm as a function of the pump energy density. Inset: lasing spectrum when the pump energy density is . (c) Intensity of the laser emission from a single OFRR of in diameter. Inset: lasing spectrum when the pump energy density is . (d) Lasing spectra of the coupled OFRR laser when the two rings are in contact (contact ). Curves are vertically shifted for clarity. 2 mM R6G is used in the experiments.

Image of FIG. 3.
FIG. 3.

Coupling coefficient between the modes of the OFRRs described in Fig. 1(b).

Image of FIG. 4.
FIG. 4.

(a) Lasing spectrum from a coupled OFRR (190 and in diameter, respectively). The gaps between the lower ring and the waveguide and between the two rings are 2 and , respectively. (b) Lasing spectrum from a single OFRR ( in diameter). Gain medium is 2 mM R6G in TEG.

Image of FIG. 5.
FIG. 5.

(a) Lasing spectra of the coupled OFRR laser described in Fig. 1(b) when the RI of 2 mM R6G solvent is varied by adding methanol to TEG. Inset: lasing wavelength as a function of solvent RI. (b) Lasing spectrum from 2 mM LDS 722 in TEG.

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/content/aip/journal/apl/98/6/10.1063/1.3554362
2011-02-08
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tunable single mode lasing from an on-chip optofluidic ring resonator laser
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/6/10.1063/1.3554362
10.1063/1.3554362
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