Abstract

We propose and experimentally demonstrate a novel in-band optical signal-to-noise ratio (OSNR) monitoring technique using a phase-modulator-embedded fiber loop mirror. This technique measures the in-band OSNR accurately by observing the output power of a fiber loop mirror filter, where the transmittance is adjusted by an embedded phase modulator driven by a low-frequency periodic signal. The measurement errors are less than 0.5dB for an OSNR between 0 and 40dB in a 10Gbits non-return-to-zero system. This technique was also shown experimentally to have high robustness against various system impairments and high feasibility to be deployed in practical implementation.

© 2007 Optical Society of America

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References

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  1. J. H. Lee, H. Y. Choi, S. K. Shin, and Y. C. Chung, J. Lightwave Technol. 24, 4162 (2006).
    [CrossRef]
  2. M. H. Cheung, L. K. Chen, and C. K. Chan, in Proceedings of IEEE Conference on Lasers and Electro-Optics / Pacific Rim (IEEE, 2003), paper W1J-(13)-5.
  3. M. D. Feuer, IEEE Photon. Technol. Lett. 17, 435 (2005).
    [CrossRef]
  4. Y. C. Ku, C. K. Chan, and L. K. Chen, in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, Technical Digest (CD) (Optical Society of America, 2006), paper OWN6.
    [PubMed]
  5. N. Onodera, K. Tsuji, T. Wantanabe, and M. Saruwatari, in Proceedings of IEEE OptoElectronics and Communications Conference (IEEE, 2005), paper 6E4-4.
  6. Z. Tao, Z. Chen, L. Fu, D. Wu, and A. Xu, Microwave Opt. Technol. Lett. 30, 63 (2001).
    [CrossRef]

2006 (1)

2005 (1)

M. D. Feuer, IEEE Photon. Technol. Lett. 17, 435 (2005).
[CrossRef]

2001 (1)

Z. Tao, Z. Chen, L. Fu, D. Wu, and A. Xu, Microwave Opt. Technol. Lett. 30, 63 (2001).
[CrossRef]

Chan, C. K.

M. H. Cheung, L. K. Chen, and C. K. Chan, in Proceedings of IEEE Conference on Lasers and Electro-Optics / Pacific Rim (IEEE, 2003), paper W1J-(13)-5.

Y. C. Ku, C. K. Chan, and L. K. Chen, in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, Technical Digest (CD) (Optical Society of America, 2006), paper OWN6.
[PubMed]

Chen, L. K.

Y. C. Ku, C. K. Chan, and L. K. Chen, in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, Technical Digest (CD) (Optical Society of America, 2006), paper OWN6.
[PubMed]

M. H. Cheung, L. K. Chen, and C. K. Chan, in Proceedings of IEEE Conference on Lasers and Electro-Optics / Pacific Rim (IEEE, 2003), paper W1J-(13)-5.

Chen, Z.

Z. Tao, Z. Chen, L. Fu, D. Wu, and A. Xu, Microwave Opt. Technol. Lett. 30, 63 (2001).
[CrossRef]

Cheung, M. H.

M. H. Cheung, L. K. Chen, and C. K. Chan, in Proceedings of IEEE Conference on Lasers and Electro-Optics / Pacific Rim (IEEE, 2003), paper W1J-(13)-5.

Choi, H. Y.

Chung, Y. C.

Feuer, M. D.

M. D. Feuer, IEEE Photon. Technol. Lett. 17, 435 (2005).
[CrossRef]

Fu, L.

Z. Tao, Z. Chen, L. Fu, D. Wu, and A. Xu, Microwave Opt. Technol. Lett. 30, 63 (2001).
[CrossRef]

Ku, Y. C.

Y. C. Ku, C. K. Chan, and L. K. Chen, in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, Technical Digest (CD) (Optical Society of America, 2006), paper OWN6.
[PubMed]

Lee, J. H.

Onodera, N.

N. Onodera, K. Tsuji, T. Wantanabe, and M. Saruwatari, in Proceedings of IEEE OptoElectronics and Communications Conference (IEEE, 2005), paper 6E4-4.

Saruwatari, M.

N. Onodera, K. Tsuji, T. Wantanabe, and M. Saruwatari, in Proceedings of IEEE OptoElectronics and Communications Conference (IEEE, 2005), paper 6E4-4.

Shin, S. K.

Tao, Z.

Z. Tao, Z. Chen, L. Fu, D. Wu, and A. Xu, Microwave Opt. Technol. Lett. 30, 63 (2001).
[CrossRef]

Tsuji, K.

N. Onodera, K. Tsuji, T. Wantanabe, and M. Saruwatari, in Proceedings of IEEE OptoElectronics and Communications Conference (IEEE, 2005), paper 6E4-4.

Wantanabe, T.

N. Onodera, K. Tsuji, T. Wantanabe, and M. Saruwatari, in Proceedings of IEEE OptoElectronics and Communications Conference (IEEE, 2005), paper 6E4-4.

Wu, D.

Z. Tao, Z. Chen, L. Fu, D. Wu, and A. Xu, Microwave Opt. Technol. Lett. 30, 63 (2001).
[CrossRef]

Xu, A.

Z. Tao, Z. Chen, L. Fu, D. Wu, and A. Xu, Microwave Opt. Technol. Lett. 30, 63 (2001).
[CrossRef]

IEEE Photon. Technol. Lett. (1)

M. D. Feuer, IEEE Photon. Technol. Lett. 17, 435 (2005).
[CrossRef]

J. Lightwave Technol. (1)

Microwave Opt. Technol. Lett. (1)

Z. Tao, Z. Chen, L. Fu, D. Wu, and A. Xu, Microwave Opt. Technol. Lett. 30, 63 (2001).
[CrossRef]

Other (3)

M. H. Cheung, L. K. Chen, and C. K. Chan, in Proceedings of IEEE Conference on Lasers and Electro-Optics / Pacific Rim (IEEE, 2003), paper W1J-(13)-5.

Y. C. Ku, C. K. Chan, and L. K. Chen, in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, Technical Digest (CD) (Optical Society of America, 2006), paper OWN6.
[PubMed]

N. Onodera, K. Tsuji, T. Wantanabe, and M. Saruwatari, in Proceedings of IEEE OptoElectronics and Communications Conference (IEEE, 2005), paper 6E4-4.

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Figures (7)

Fig. 1
Fig. 1

(a) Schematic diagram of a transmission link with the proposed OSNR monitoring module. PC, polarization controller; (b) Illustrated PM-FLM transfer function when destructive and constructive interference for the data signal occurs.

Fig. 2
Fig. 2

Experimental setup. ATT; optical attenuator.

Fig. 3
Fig. 3

Measured OSNR and monitoring errors.

Fig. 4
Fig. 4

OSNR monitoring results in a 150 km SMF link ( PMD < 1.5 ps ) .

Fig. 5
Fig. 5

Monitoring errors for (a) different DGDs and (b) partially polarized ASE with different DOPs and alignment to signal, for 25 dB OSNR.

Fig. 6
Fig. 6

Measured OSNR (circles) and monitoring errors (squares) for polarized ASE ( DOP = 99.69 % ) that is parallel (black) or orthogonal (white) to signal.

Fig. 7
Fig. 7

Measured OSNR and monitoring errors for 2.5 Gbit s data rate.

Equations (1)

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OSNR ( dB 0.1 nm ) = P sig , in NEB f P ASE , in × 0.1 nm = ( 1 r ) NEB f [ r ( 1 D sig ) ( 1 + D sig ) ] × 0.1 nm ,

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