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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 25 — Dec. 13, 2004
  • pp: 6335–6340

Optically controlled Sagnac loop comb filter

K. L. Lee, M. P. Fok, S. M. Wan, and C. Shu  »View Author Affiliations


Optics Express, Vol. 12, Issue 25, pp. 6335-6340 (2004)
http://dx.doi.org/10.1364/OPEX.12.006335


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Abstract

We propose a new type of dynamically tunable birefringence comb filter based on a semiconductor optical amplifier Sagnac loop interferometer. By optically modulating the birefringence of the amplifier, we demonstrate a tuning of the output wavelengths. The shift of wavelength increases monotonically with the power of the control light until saturation occurs. The tuning relation is independent of the comb spacing governed by the length and birefringence of the polarization maintaining fiber inside the loop. A tuning range up to 59% of the comb spacing has been achieved at 18.5 dBm input power.

© 2004 Optical Society of America

OCIS Codes
(120.5790) Instrumentation, measurement, and metrology : Sagnac effect
(260.1440) Physical optics : Birefringence
(350.2460) Other areas of optics : Filters, interference

ToC Category:
Research Papers

History
Original Manuscript: November 12, 2004
Revised Manuscript: December 3, 2004
Published: December 13, 2004

Citation
K. Lee, M. Fok, S. Wan, and C. Shu, "Optically controlled Sagnac loop comb filter," Opt. Express 12, 6335-6340 (2004)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-12-25-6335


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References

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