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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 11 — May. 29, 2006
  • pp: 4636–4643

Sagnac interferometer based flat-top birefringent interleaver

Chao-Wei Lee, Ruibo Wang, Pochi Yeh, and Wood-Hi Cheng  »View Author Affiliations


Optics Express, Vol. 14, Issue 11, pp. 4636-4643 (2006)
http://dx.doi.org/10.1364/OE.14.004636


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Abstract

We propose and demonstrate a novel Sagnac interferometer based flat-top birefringent optical interleaver employing a ring-cavity as a phase-shift element. The Sagnac interferometer with birefringent crystals provides the optical path difference for interference between the two orthogonal polarization components and the ring-cavity provides the phase shifts needed to achieve a flat-top spectral passband at the output. Fresnel reflections at the prism-air interface of the ring cavity are employed to obtain the desired phase shifts so that highly accurate thin-film coatings are not needed. The Sagnac interferometer based interleaver in a 25-GHz channel spacing (0.2 nm) application exhibits a 0.5-dB passband larger than 0.145 nm, a 25-dB stop band greater than 0.145 nm, and a channel isolation higher than 36 dB over the entire C-band. The superior performance is accompanied with a group velocity dispersion and ripples that can be compensated by using dispersion compensators.

© 2006 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(230.4320) Optical devices : Nonlinear optical devices
(260.1440) Physical optics : Birefringence

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 16, 2006
Revised Manuscript: April 30, 2006
Manuscript Accepted: May 1, 2006
Published: May 29, 2006

Citation
Chao-Wei Lee, Ruibo Wang, Pochi Yeh, and Wood-Hi Cheng, "Sagnac interferometer based flat-top birefringent interleaver," Opt. Express 14, 4636-4643 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-11-4636


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References

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