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Microsphere laser
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In this study, we demonstrate that starch is a low-cost and good material for microsphere biolasers. By using a simple emulsion method with a dehydration process, dye-doped starch microsphere lasers with diameters ranging from 40 to 180 µm have been successfully obtained.
9p
viengels
25-08-2023
8
4
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The lasing thresholds of microsphere biolasers fabricated at 25 °C and 60 °C are similar. Furthermore, lasing operation under continuous pumping and lasing stability against storing time are also investigated. A typical 42 µm microsphere can still lase upon 2×104 excitation pulses. Lasers can work well after being stored for 12 weeks under ambient conditions.
7p
meyerowitz
25-12-2021
12
1
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The objectives of the thesis: Research, fabricate Er3+-doped silica glass microspheres with different sizes by arc discharge method; building an experimental system to investigate WGM mode laser emission spectrum in the optical communication wavelength region ~ 1550 nm of some fabricated microspheres.
28p
extraenglish
24-05-2021
13
3
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The objectives of the thesis: Research, fabricate Er3+-doped silica glass microspheres with different sizes by arc discharge method; building an experimental system to investigate WGM mode laser emission spectrum in the optical communication wavelength region ~ 1550 nm of some fabricated microspheres.
28p
capheviahe27
23-02-2021
12
3
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In this paper, we present a review of enhancement and wavelength shift of abnormal upconversion green light emission from erbium ions doped in silica with narrow linewidth in the metallic-coated microsphere cavity. Although the phenomenon of the 537 nm- green light emission is not yet understood, its enhancement of several orders of magnitude seems to be due to the excitation of plasmons. The metallic-coated microsphere cavity has led to the lowest threshold so far observed in microsphere cavity lasers from 0.2 mW to 60 nW.
7p
thuyliebe
09-10-2018
36
1
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The wavelength shift effect of the Whispering Gallery Mode (WGM) laser with Er3+ /Yb3+ co-doped phosphate glass microsphere has been investigated. The experiment was carried out by half fiber taper coupling technique. The microsphere lasers have been pumped at 980 nm to take full advantage of energy transfer effect from ion Ytterbium to ion Erbium. The WGM’s wavelength shift were analyzed for sphere diameters of 90 µm. The observed lasing lines extends from 1532 nm to 1611 nm.
8p
tuanlocmuido
19-12-2012
36
2
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