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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 21 — Nov. 1, 2007
  • pp: 3197–3199

Optical microsphere amplification system

Kouki Totsuka and Makoto Tomita  »View Author Affiliations

Optics Letters, Vol. 32, Issue 21, pp. 3197-3199 (2007)

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We demonstrated a compact optical amplification system using a fiber taper and rare-earth-doped microsphere. Both the signal and pump beams were injected into the microsphere via the fiber taper to increase the spatial matching between two whispering gallery modes. As the pump power was increased, the resonance dip in the transmission spectra due to intrinsic attenuation in the microsphere became filled and then transited to the resonance gain peak. An amplification factor of up to 2.5 was realized with a microsphere of 63 μ m in diameter.

© 2007 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(230.4480) Optical devices : Optical amplifiers

ToC Category:
Optical Devices

Original Manuscript: July 10, 2007
Manuscript Accepted: September 25, 2007
Published: October 26, 2007

Kouki Totsuka and Makoto Tomita, "Optical microsphere amplification system," Opt. Lett. 32, 3197-3199 (2007)

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