Abstract

We propose a scheme to achieve regenerative format conversion from a distorted non-return-to-zero-on–off-keying (NRZ-OOK) signal to a return-to-zero-binary-phase-shift-keying (RZ-BPSK) signal of high quality in an integrated device. This proposal is achieved by employing an interferometer on a silicon chip with a coupled ring resonator optical waveguide embedded in one arm. In this scheme the amplified NRZ-OOK signal is injected into the converter together with a locally generated return-to-zero (RZ) pulse train at a different wavelength. Owing to the linear and nonlinear effects in the silicon waveguides, the RZ pulse train changes to a clean RZ-BPSK signal after it is cross modulated by the NRZ-OOK signal. To verify the feasibility of our scheme, we simulate the conversion at 10Gbitss.

© 2008 Optical Society of America

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Kitayama, K.

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B. E. Little, S. T. Chu, H. A. Haus, J. Foresi, and J. P. Laine, J. Lightwave Technol. 15, 998 (1997).
[CrossRef]

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Lu, Y.

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Mitani, S.

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M. A. Popović, T. Barwicz, M. R. Watt, P. T. Rakich, L. Socci, E. P. Ippen, F. X. Kärtner, and H. I. Smith, in Conference on Lasers and Electro-Optics (Optical Society of America, 2005), Vol. 1, p. 266.

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S. Lee, K. Chow, C. Shu, and C. Lin, in Proceedings of the Lasers and Electro-Optics Society (IEEE, 2005), p. 1579.

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M. A. Popović, T. Barwicz, M. R. Watt, P. T. Rakich, L. Socci, E. P. Ippen, F. X. Kärtner, and H. I. Smith, in Conference on Lasers and Electro-Optics (Optical Society of America, 2005), Vol. 1, p. 266.

Socci, L.

M. A. Popović, T. Barwicz, M. R. Watt, P. T. Rakich, L. Socci, E. P. Ippen, F. X. Kärtner, and H. I. Smith, in Conference on Lasers and Electro-Optics (Optical Society of America, 2005), Vol. 1, p. 266.

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[CrossRef]

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[CrossRef]

Turner, A. C.

Vörckel, A.

Wahlbrink, T.

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M. A. Popović, T. Barwicz, M. R. Watt, P. T. Rakich, L. Socci, E. P. Ippen, F. X. Kärtner, and H. I. Smith, in Conference on Lasers and Electro-Optics (Optical Society of America, 2005), Vol. 1, p. 266.

Wen, H.

H. Jiang, H. Wen, L. Han, Y. Guo, and H. Zhang, IEEE Photon. Technol. Lett. 19, 1985 (2007).
[CrossRef]

Xu, X.

C. Yan, Y. Su, L. Yi, L. Leng, X. Tian, X. Xu, and Y. Tian, IEEE Photon. Technol. Lett. 18, 2368 (2006).
[CrossRef]

Yan, C.

T. Ye, C. Yan, Y. Lu, F. Liu, and Y. Su, Opt. Express 16, 15325 (2008).
[CrossRef] [PubMed]

C. Yan, Y. Su, L. Yi, L. Leng, X. Tian, X. Xu, and Y. Tian, IEEE Photon. Technol. Lett. 18, 2368 (2006).
[CrossRef]

Ye, T.

Yi, L.

C. Yan, Y. Su, L. Yi, L. Leng, X. Tian, X. Xu, and Y. Tian, IEEE Photon. Technol. Lett. 18, 2368 (2006).
[CrossRef]

Yin, L.

Zhang, H.

H. Jiang, H. Wen, L. Han, Y. Guo, and H. Zhang, IEEE Photon. Technol. Lett. 19, 1985 (2007).
[CrossRef]

Appl. Phys. Lett.

D. Dimitropoulos, S. Fathpour, and B. Jalali, Appl. Phys. Lett. 87, 261108 (2005).
[CrossRef]

Electron. Lett.

W. Astar and G. M. Carter, Electron. Lett. 42, 1472 (2006).
[CrossRef]

IEEE Photon. Technol. Lett.

H. Jiang, H. Wen, L. Han, Y. Guo, and H. Zhang, IEEE Photon. Technol. Lett. 19, 1985 (2007).
[CrossRef]

C. Yan, Y. Su, L. Yi, L. Leng, X. Tian, X. Xu, and Y. Tian, IEEE Photon. Technol. Lett. 18, 2368 (2006).
[CrossRef]

J. Lightwave Technol.

Opt. Express

Opt. Lett.

Other

M. A. Popović, T. Barwicz, M. R. Watt, P. T. Rakich, L. Socci, E. P. Ippen, F. X. Kärtner, and H. I. Smith, in Conference on Lasers and Electro-Optics (Optical Society of America, 2005), Vol. 1, p. 266.

S. Lee, K. Chow, C. Shu, and C. Lin, in Proceedings of the Lasers and Electro-Optics Society (IEEE, 2005), p. 1579.

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Figures (5)

Fig. 1
Fig. 1

Regenerative NRZ-OOK to RZ-BPSK format converter.

Fig. 2
Fig. 2

Resonance redshift with the increasing of input pump power, where the pump intensity is (a) zero, (b) small, and (c) sufficiently high, respectively.

Fig. 3
Fig. 3

Illustration of the RZ to RZ-BPSK conversion: (a) time and (b) frequency domains.

Fig. 4
Fig. 4

Linear filtering effect of CROW (a) without and (b) with considering the fabrication imprecation; (c) intensity and (d) phase nonlinear transfer functions of the conversion system.

Fig. 5
Fig. 5

10 Gbits s regenerative conversion: (a) initial distorted NRZ signal, (b) RZ signal obtained at the upper arm of the converter, (c) power and (d) phase eye diagram of the output RZ-BPSK signal.

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