Abstract

We compare the performances of the 0/π-phase-shifted SSFBG (0/π-SSFBG) and the ± π/2-phase-shifted SSFBG (± π/2-SSFBG) en/decoders in the three aspects: the security, coding and system performances. In terms of the security performance, we evaluate the security performance by the investigation on the encoded waveform of both encoders. We also propose and demonstrate the code extraction technique for the ± π/2-SSFBG encoder when input pulse has large pulse width. Then, we analyze the coding performance of these two kinds of en/decoders by the calculation of autocorrelation and cross-correlation with sets of 31-chip, 63-chip and 127-chip Gold codes. Furthermore, we propose and demonstrate the hybrid use of both en/decoders. To demonstrate the performance of both en/decoders and the hybrid use in the different systems, we employ four 31-chip 640 Gchip/s 0/π-SSFBG and ± π/2-SSFBG en/decoders in the 4-user 10 Gbps/user on-off keying and differential phase-shift keying OCDMA systems.

© 2011 OSA

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  1. H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
    [CrossRef]
  2. X. Wang, N. Wada, G. Cincotti, T. Miyazaki, and K. Kitayama, “Demonstration of over 128-gb/s-capacity (12-User/spl times/10.71-gb/s/user) asynchronous OCDMA using FEC and AWG-based multiport optical encoder/decoders,” IEEE Photon. Technol. Lett. 18(15), 1603–1605 (2006).
    [CrossRef]
  3. G. E. Town, K. Chan, and G. Yoffe, “Design and performance of high-speed optical pulse-code generators using optical fiber Bragg gratings,” IEEE J. Sel. Top. Quantum Electron. 5(5), 1325–1331 (1999).
    [CrossRef]
  4. P. C. Teh, P. Petropoulos, M. Ibsen, and D. J. Richardson, “A comparative study of the performance of seven- and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings,” J. Lightwave Technol. 19(9), 1352–1365 (2001).
    [CrossRef]
  5. A. Grunnet-Jepsen, A. E. Johnson, E. S. Maniloff, T. W. Mossberg, M. J. Munroe, and J. N. Sweetser, “Fiber Bragg grating based spectral encoder/decoder for lightwave CDMA,” Electron. Lett. 35(13), 1096–1097 (1999).
    [CrossRef]
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    [CrossRef]
  8. X. Wang, K. Matsushima, A. Nishiki, N. Wada, and K. Kitayama, “High reflectivity superstructured FBG for coherent optical code generation and recognition,” Opt. Express 12(22), 5457–5468 (2004).
    [CrossRef] [PubMed]
  9. X. Wang, K. Matsushima, K. Kitayama, A. Nishiki, N. Wada, and F. Kubota, “High-performance optical code generation and recognition by use of a 511-chip, 640-Gchip/s phase-shifted superstructured fiber Bragg grating,” Opt. Lett. 30(4), 355–357 (2005).
    [CrossRef] [PubMed]
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    [CrossRef]
  15. X. Wang and K. Kitayama, “Analysis of beat noise in coherent and incoherent time-spreading OCDMA,” J. Lightwave Technol. 22(10), 2226–2235 (2004).
    [CrossRef]
  16. X. Wang, T. Hamanaka, N. Wada, and K. Kitayama, “Dispersion-flattened-fiber based optical thresholder for multiple-access-interference suppression in OCDMA system,” Opt. Express 13(14), 5499–5505 (2005).
    [CrossRef] [PubMed]
  17. N. Wada, H. Sotobayashi, and K. Kitayama, “Error-free 100km transmission at 10Gbit/s in optical code division multiplexing system using BPSK picosecond-pulse code sequence with novel time-gating detection,” Electron. Lett. 35(10), 833–834 (1999).
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  19. P. Petropoulos, N. Wada, P. C. Teh, M. Ibsen, W. Chujo, K. Kitayama, and D. J. Richardson, “Demonstration of a 64-chip OCDMA system using superstructured fiber gratings and time-gating detection,” IEEE Photon. Technol. Lett. 13(11), 1239–1241 (2001).
    [CrossRef]

2010 (2)

B. Dai and X. Wang, “Security improvement using ±π/2-phase-shifted SSFBG en/decoder in time-spreading OCDMA,” IEEE Photon. Technol. Lett. 22(12), 881–883 (2010).
[CrossRef]

Z. Si, F. Yin, M. Xin, H. Chen, M. Chen, and S. Xie, “Code extraction from encoded signal in time-spreading optical code division multiple access,” Opt. Lett. 35(2), 229–231 (2010).
[CrossRef] [PubMed]

2006 (2)

A. Agarwal, P. Toliver, R. Menendez, S. Etemad, J. Jackel, J. Young, T. Banwell, B. E. Little, S. T. Chu, Wei Chen, J. Wenlu Chen, F. Hryniewicz, D. Johnson, O. Gill, R. King, K. Davidson, Donovan, and P. J. Delfyett, “Fully programmable ring-resonator-based integrated photonic circuit for phase coherent applications,” J. Lightwave Technol. 24(1), 77–87 (2006).
[CrossRef]

X. Wang, N. Wada, G. Cincotti, T. Miyazaki, and K. Kitayama, “Demonstration of over 128-gb/s-capacity (12-User/spl times/10.71-gb/s/user) asynchronous OCDMA using FEC and AWG-based multiport optical encoder/decoders,” IEEE Photon. Technol. Lett. 18(15), 1603–1605 (2006).
[CrossRef]

2005 (2)

2004 (2)

2002 (1)

P. C. Teh, M. Ibsen, J. H. Lee, P. Petropoulos, and D. J. Richardson, “Demonstration of a four-channel WDM/OCDMA system using 255-chip 320-Gchip/s quarternary phase coding gratings,” IEEE Photon. Technol. Lett. 14(2), 227–229 (2002).
[CrossRef]

2001 (2)

P. Petropoulos, N. Wada, P. C. Teh, M. Ibsen, W. Chujo, K. Kitayama, and D. J. Richardson, “Demonstration of a 64-chip OCDMA system using superstructured fiber gratings and time-gating detection,” IEEE Photon. Technol. Lett. 13(11), 1239–1241 (2001).
[CrossRef]

P. C. Teh, P. Petropoulos, M. Ibsen, and D. J. Richardson, “A comparative study of the performance of seven- and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings,” J. Lightwave Technol. 19(9), 1352–1365 (2001).
[CrossRef]

1999 (4)

N. Wada, H. Sotobayashi, and K. Kitayama, “Error-free 100km transmission at 10Gbit/s in optical code division multiplexing system using BPSK picosecond-pulse code sequence with novel time-gating detection,” Electron. Lett. 35(10), 833–834 (1999).
[CrossRef]

G. E. Town, K. Chan, and G. Yoffe, “Design and performance of high-speed optical pulse-code generators using optical fiber Bragg gratings,” IEEE J. Sel. Top. Quantum Electron. 5(5), 1325–1331 (1999).
[CrossRef]

A. Grunnet-Jepsen, A. E. Johnson, E. S. Maniloff, T. W. Mossberg, M. J. Munroe, and J. N. Sweetser, “Fiber Bragg grating based spectral encoder/decoder for lightwave CDMA,” Electron. Lett. 35(13), 1096–1097 (1999).
[CrossRef]

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

Agarwal, A.

Amano, C.

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

Banwell, T.

Chan, K.

G. E. Town, K. Chan, and G. Yoffe, “Design and performance of high-speed optical pulse-code generators using optical fiber Bragg gratings,” IEEE J. Sel. Top. Quantum Electron. 5(5), 1325–1331 (1999).
[CrossRef]

Chen, H.

Chen, M.

Chu, S. T.

Chujo, W.

P. Petropoulos, N. Wada, P. C. Teh, M. Ibsen, W. Chujo, K. Kitayama, and D. J. Richardson, “Demonstration of a 64-chip OCDMA system using superstructured fiber gratings and time-gating detection,” IEEE Photon. Technol. Lett. 13(11), 1239–1241 (2001).
[CrossRef]

Cincotti, G.

X. Wang, N. Wada, G. Cincotti, T. Miyazaki, and K. Kitayama, “Demonstration of over 128-gb/s-capacity (12-User/spl times/10.71-gb/s/user) asynchronous OCDMA using FEC and AWG-based multiport optical encoder/decoders,” IEEE Photon. Technol. Lett. 18(15), 1603–1605 (2006).
[CrossRef]

Dai, B.

B. Dai and X. Wang, “Security improvement using ±π/2-phase-shifted SSFBG en/decoder in time-spreading OCDMA,” IEEE Photon. Technol. Lett. 22(12), 881–883 (2010).
[CrossRef]

Davidson, K.

Delfyett, P. J.

Donovan,

Etemad, S.

Gill, O.

Goh, T.

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

Grunnet-Jepsen, A.

A. Grunnet-Jepsen, A. E. Johnson, E. S. Maniloff, T. W. Mossberg, M. J. Munroe, and J. N. Sweetser, “Fiber Bragg grating based spectral encoder/decoder for lightwave CDMA,” Electron. Lett. 35(13), 1096–1097 (1999).
[CrossRef]

Hamanaka, T.

Hirano, A.

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

Hryniewicz, F.

Ibsen, M.

P. C. Teh, M. Ibsen, J. H. Lee, P. Petropoulos, and D. J. Richardson, “Demonstration of a four-channel WDM/OCDMA system using 255-chip 320-Gchip/s quarternary phase coding gratings,” IEEE Photon. Technol. Lett. 14(2), 227–229 (2002).
[CrossRef]

P. Petropoulos, N. Wada, P. C. Teh, M. Ibsen, W. Chujo, K. Kitayama, and D. J. Richardson, “Demonstration of a 64-chip OCDMA system using superstructured fiber gratings and time-gating detection,” IEEE Photon. Technol. Lett. 13(11), 1239–1241 (2001).
[CrossRef]

P. C. Teh, P. Petropoulos, M. Ibsen, and D. J. Richardson, “A comparative study of the performance of seven- and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings,” J. Lightwave Technol. 19(9), 1352–1365 (2001).
[CrossRef]

Ishii, T.

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

Jackel, J.

Johnson, A. E.

A. Grunnet-Jepsen, A. E. Johnson, E. S. Maniloff, T. W. Mossberg, M. J. Munroe, and J. N. Sweetser, “Fiber Bragg grating based spectral encoder/decoder for lightwave CDMA,” Electron. Lett. 35(13), 1096–1097 (1999).
[CrossRef]

Johnson, D.

King, R.

Kitayama, K.

X. Wang, N. Wada, G. Cincotti, T. Miyazaki, and K. Kitayama, “Demonstration of over 128-gb/s-capacity (12-User/spl times/10.71-gb/s/user) asynchronous OCDMA using FEC and AWG-based multiport optical encoder/decoders,” IEEE Photon. Technol. Lett. 18(15), 1603–1605 (2006).
[CrossRef]

X. Wang, K. Matsushima, K. Kitayama, A. Nishiki, N. Wada, and F. Kubota, “High-performance optical code generation and recognition by use of a 511-chip, 640-Gchip/s phase-shifted superstructured fiber Bragg grating,” Opt. Lett. 30(4), 355–357 (2005).
[CrossRef] [PubMed]

X. Wang, T. Hamanaka, N. Wada, and K. Kitayama, “Dispersion-flattened-fiber based optical thresholder for multiple-access-interference suppression in OCDMA system,” Opt. Express 13(14), 5499–5505 (2005).
[CrossRef] [PubMed]

X. Wang, K. Matsushima, A. Nishiki, N. Wada, and K. Kitayama, “High reflectivity superstructured FBG for coherent optical code generation and recognition,” Opt. Express 12(22), 5457–5468 (2004).
[CrossRef] [PubMed]

X. Wang and K. Kitayama, “Analysis of beat noise in coherent and incoherent time-spreading OCDMA,” J. Lightwave Technol. 22(10), 2226–2235 (2004).
[CrossRef]

P. Petropoulos, N. Wada, P. C. Teh, M. Ibsen, W. Chujo, K. Kitayama, and D. J. Richardson, “Demonstration of a 64-chip OCDMA system using superstructured fiber gratings and time-gating detection,” IEEE Photon. Technol. Lett. 13(11), 1239–1241 (2001).
[CrossRef]

N. Wada, H. Sotobayashi, and K. Kitayama, “Error-free 100km transmission at 10Gbit/s in optical code division multiplexing system using BPSK picosecond-pulse code sequence with novel time-gating detection,” Electron. Lett. 35(10), 833–834 (1999).
[CrossRef]

Kubota, F.

Kurokawa, T.

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

Lee, J. H.

P. C. Teh, M. Ibsen, J. H. Lee, P. Petropoulos, and D. J. Richardson, “Demonstration of a four-channel WDM/OCDMA system using 255-chip 320-Gchip/s quarternary phase coding gratings,” IEEE Photon. Technol. Lett. 14(2), 227–229 (2002).
[CrossRef]

Little, B. E.

Maniloff, E. S.

A. Grunnet-Jepsen, A. E. Johnson, E. S. Maniloff, T. W. Mossberg, M. J. Munroe, and J. N. Sweetser, “Fiber Bragg grating based spectral encoder/decoder for lightwave CDMA,” Electron. Lett. 35(13), 1096–1097 (1999).
[CrossRef]

Matsushima, K.

Menendez, R.

Miyazaki, T.

X. Wang, N. Wada, G. Cincotti, T. Miyazaki, and K. Kitayama, “Demonstration of over 128-gb/s-capacity (12-User/spl times/10.71-gb/s/user) asynchronous OCDMA using FEC and AWG-based multiport optical encoder/decoders,” IEEE Photon. Technol. Lett. 18(15), 1603–1605 (2006).
[CrossRef]

Mossberg, T. W.

A. Grunnet-Jepsen, A. E. Johnson, E. S. Maniloff, T. W. Mossberg, M. J. Munroe, and J. N. Sweetser, “Fiber Bragg grating based spectral encoder/decoder for lightwave CDMA,” Electron. Lett. 35(13), 1096–1097 (1999).
[CrossRef]

Munroe, M. J.

A. Grunnet-Jepsen, A. E. Johnson, E. S. Maniloff, T. W. Mossberg, M. J. Munroe, and J. N. Sweetser, “Fiber Bragg grating based spectral encoder/decoder for lightwave CDMA,” Electron. Lett. 35(13), 1096–1097 (1999).
[CrossRef]

Nishiki, A.

Okamoto, K.

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

Petropoulos, P.

P. C. Teh, M. Ibsen, J. H. Lee, P. Petropoulos, and D. J. Richardson, “Demonstration of a four-channel WDM/OCDMA system using 255-chip 320-Gchip/s quarternary phase coding gratings,” IEEE Photon. Technol. Lett. 14(2), 227–229 (2002).
[CrossRef]

P. Petropoulos, N. Wada, P. C. Teh, M. Ibsen, W. Chujo, K. Kitayama, and D. J. Richardson, “Demonstration of a 64-chip OCDMA system using superstructured fiber gratings and time-gating detection,” IEEE Photon. Technol. Lett. 13(11), 1239–1241 (2001).
[CrossRef]

P. C. Teh, P. Petropoulos, M. Ibsen, and D. J. Richardson, “A comparative study of the performance of seven- and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings,” J. Lightwave Technol. 19(9), 1352–1365 (2001).
[CrossRef]

Richardson, D. J.

P. C. Teh, M. Ibsen, J. H. Lee, P. Petropoulos, and D. J. Richardson, “Demonstration of a four-channel WDM/OCDMA system using 255-chip 320-Gchip/s quarternary phase coding gratings,” IEEE Photon. Technol. Lett. 14(2), 227–229 (2002).
[CrossRef]

P. C. Teh, P. Petropoulos, M. Ibsen, and D. J. Richardson, “A comparative study of the performance of seven- and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings,” J. Lightwave Technol. 19(9), 1352–1365 (2001).
[CrossRef]

P. Petropoulos, N. Wada, P. C. Teh, M. Ibsen, W. Chujo, K. Kitayama, and D. J. Richardson, “Demonstration of a 64-chip OCDMA system using superstructured fiber gratings and time-gating detection,” IEEE Photon. Technol. Lett. 13(11), 1239–1241 (2001).
[CrossRef]

Sato, K.

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

Si, Z.

Sotobayashi, H.

N. Wada, H. Sotobayashi, and K. Kitayama, “Error-free 100km transmission at 10Gbit/s in optical code division multiplexing system using BPSK picosecond-pulse code sequence with novel time-gating detection,” Electron. Lett. 35(10), 833–834 (1999).
[CrossRef]

Sweetser, J. N.

A. Grunnet-Jepsen, A. E. Johnson, E. S. Maniloff, T. W. Mossberg, M. J. Munroe, and J. N. Sweetser, “Fiber Bragg grating based spectral encoder/decoder for lightwave CDMA,” Electron. Lett. 35(13), 1096–1097 (1999).
[CrossRef]

Takenouchi, H.

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

Teh, P. C.

P. C. Teh, M. Ibsen, J. H. Lee, P. Petropoulos, and D. J. Richardson, “Demonstration of a four-channel WDM/OCDMA system using 255-chip 320-Gchip/s quarternary phase coding gratings,” IEEE Photon. Technol. Lett. 14(2), 227–229 (2002).
[CrossRef]

P. Petropoulos, N. Wada, P. C. Teh, M. Ibsen, W. Chujo, K. Kitayama, and D. J. Richardson, “Demonstration of a 64-chip OCDMA system using superstructured fiber gratings and time-gating detection,” IEEE Photon. Technol. Lett. 13(11), 1239–1241 (2001).
[CrossRef]

P. C. Teh, P. Petropoulos, M. Ibsen, and D. J. Richardson, “A comparative study of the performance of seven- and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings,” J. Lightwave Technol. 19(9), 1352–1365 (2001).
[CrossRef]

Toliver, P.

Town, G. E.

G. E. Town, K. Chan, and G. Yoffe, “Design and performance of high-speed optical pulse-code generators using optical fiber Bragg gratings,” IEEE J. Sel. Top. Quantum Electron. 5(5), 1325–1331 (1999).
[CrossRef]

Tsuda, H.

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

Wada, N.

X. Wang, N. Wada, G. Cincotti, T. Miyazaki, and K. Kitayama, “Demonstration of over 128-gb/s-capacity (12-User/spl times/10.71-gb/s/user) asynchronous OCDMA using FEC and AWG-based multiport optical encoder/decoders,” IEEE Photon. Technol. Lett. 18(15), 1603–1605 (2006).
[CrossRef]

X. Wang, T. Hamanaka, N. Wada, and K. Kitayama, “Dispersion-flattened-fiber based optical thresholder for multiple-access-interference suppression in OCDMA system,” Opt. Express 13(14), 5499–5505 (2005).
[CrossRef] [PubMed]

X. Wang, K. Matsushima, K. Kitayama, A. Nishiki, N. Wada, and F. Kubota, “High-performance optical code generation and recognition by use of a 511-chip, 640-Gchip/s phase-shifted superstructured fiber Bragg grating,” Opt. Lett. 30(4), 355–357 (2005).
[CrossRef] [PubMed]

X. Wang, K. Matsushima, A. Nishiki, N. Wada, and K. Kitayama, “High reflectivity superstructured FBG for coherent optical code generation and recognition,” Opt. Express 12(22), 5457–5468 (2004).
[CrossRef] [PubMed]

P. Petropoulos, N. Wada, P. C. Teh, M. Ibsen, W. Chujo, K. Kitayama, and D. J. Richardson, “Demonstration of a 64-chip OCDMA system using superstructured fiber gratings and time-gating detection,” IEEE Photon. Technol. Lett. 13(11), 1239–1241 (2001).
[CrossRef]

N. Wada, H. Sotobayashi, and K. Kitayama, “Error-free 100km transmission at 10Gbit/s in optical code division multiplexing system using BPSK picosecond-pulse code sequence with novel time-gating detection,” Electron. Lett. 35(10), 833–834 (1999).
[CrossRef]

Wang, X.

Wei Chen,

Wenlu Chen, J.

Xie, S.

Xin, M.

Yin, F.

Yoffe, G.

G. E. Town, K. Chan, and G. Yoffe, “Design and performance of high-speed optical pulse-code generators using optical fiber Bragg gratings,” IEEE J. Sel. Top. Quantum Electron. 5(5), 1325–1331 (1999).
[CrossRef]

Young, J.

Electron. Lett. (3)

H. Tsuda, H. Takenouchi, T. Ishii, K. Okamoto, T. Goh, K. Sato, A. Hirano, T. Kurokawa, and C. Amano, “Spectral encoding and decoding of 10 Gbit/s femtosecond pulses using high resolution arrayed-waveguide grating,” Electron. Lett. 35(14), 1186–1188 (1999).
[CrossRef]

A. Grunnet-Jepsen, A. E. Johnson, E. S. Maniloff, T. W. Mossberg, M. J. Munroe, and J. N. Sweetser, “Fiber Bragg grating based spectral encoder/decoder for lightwave CDMA,” Electron. Lett. 35(13), 1096–1097 (1999).
[CrossRef]

N. Wada, H. Sotobayashi, and K. Kitayama, “Error-free 100km transmission at 10Gbit/s in optical code division multiplexing system using BPSK picosecond-pulse code sequence with novel time-gating detection,” Electron. Lett. 35(10), 833–834 (1999).
[CrossRef]

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Figures (12)

Fig. 1
Fig. 1

Encoded waveforms of 0/π-SSFBG and ± π/2-SSFBG encoders with different chip durations (a) CG1 and (b) NG1.

Fig. 2
Fig. 2

Encoded waveforms of 0/π-SSFBG and ± π/2-SSFBG encoders with different chip durations (a) CG5 and (b) NG5.

Fig. 3
Fig. 3

Demonstration of code extraction technique for the ± π/2-SSFBG encoders (a) NG1 and (b) NG2.

Fig. 4
Fig. 4

Autocorrelation of the 0/π-SSFBG and ± π/2-SSFBG en/decoders with 31-chip, 63-chip and 127-chip Gold code.

Fig. 5
Fig. 5

Cross-correlation of the 0/π-SSFBG and ± π/2-SSFBG en/decoders and the hybrid use with (a) 31-chip, (b) 63-chip and (c) 127-chip Gold code.

Fig. 6
Fig. 6

Measured and calculated correlation of 0/π-SSFBG and ± π/2-SSFBG en/decoders.

Fig. 7
Fig. 7

Experimental setup of 2-user OOK-OCDMA system and measured waveforms and eye diagrams.

Fig. 8
Fig. 8

BER performance of the 0/π-SSFBG and ± π/2-SSFBG en/decoders in the OOK-OCDMA system.

Fig. 9
Fig. 9

Experimental setup of 4-user OOK-OCDMA system with hybrid use of en/decoders and measured waveforms and eye diagrams.

Fig. 10
Fig. 10

Experimental setup of 4-user DPSK-OCDMA system with hybrid use of en/decoders and measured waveforms and eye diagrams.

Fig. 11
Fig. 11

Measured waveforms and eye diagrams in the 4-user DPSK-OCDMA system.

Fig. 12
Fig. 12

BER performance of the 0/π-SSFBG and ± π/2-SSFBG en/decoders in the DPSK-OCDMA system.

Tables (2)

Tables Icon

Table 1 Different SSFBG En/Decoder Used in the Experiment

Tables Icon

Table 2 Average Values of Auto- and Crosscorrelation for Different En/decoder and Chip Length

Metrics