High-gain wavelength-selective amplification and cavity ring down spectroscopy in a fluoride glass erbium-doped microsphere

We experimentally demonstrate a compact optical amplifier consisting of a rare-earth-doped whispering-gallery-mode microsphere coupled via a tapered fiber. A gain up to 20 dB is reported in an erbium-doped fluoride glass microsphere 135 mu m in diameter. Below the amplification regime, the optical gain is used to compensate for unavoidable losses due to surface contamination or scattering. Quality factor as high as 2 x 10(9) has been measured by analyzing the transient response of the microsphere excited by a dynamically shifted frequency input signal. (C) 2012 Optical Society of America


Published in:
Optics Letters, 37, 22, 4735-4737
Year:
2012
Publisher:
Washington, Optical Soc Amer
ISSN:
0146-9592
Laboratories:




 Record created 2013-02-27, last modified 2018-09-13


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