Abstract

We demonstrate experimental all-optical code-division multiplexing (AO-CDM) systems using 64-ps optical pulses and a 2n prime code of n = 3. A distinguishing feature of this experiment is that the modulation of an ultrashort optical clock stream by electrical data is realized without using any optical intensity modulator at each transmitter. Moreover, only low-cost optical 2 × 2 couplers and fiber delay lines are employed to implement all-serial encoders and decoders for a 2n prime code.

© 1999 Optical Society of America

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References

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  1. W.C. Kwong, P.R. Prucnal, “Ultrafast all-optical code-division multiple-access (CDMA) fiber-optic networks,” Computer Networks and ISDN Systems 26(6), 1063–1086 (1994).
    [CrossRef]
  2. R.M. Gagliardi et al., “Fiber-optic digital video multiplexing using optical CDMA,” J. Lightwave Technol. 11(1), 20–26 (1993).
    [CrossRef]
  3. G.J. Pendock et al., “Multi-gigabit per second demonstration of photonic code-division multiplexing,” Electron. Lett. 31(10), 819–820 (1995).
    [CrossRef]
  4. F.R.K. Chung et al., “Optical orthogonal codes: Design, analysis, and applications,” IEEE Trans. Inform. Theory 35(3), 595–604 (1989).
    [CrossRef]
  5. P.R. Prucnal et al., “Spread spectrum fiber-optic local area network using optical processing,”J. Lightwave Technol. LT-4(5), 547–554 (1986).
    [CrossRef]
  6. W.C. Kwong, G.-C. Yang, “Construction of 2n prime-sequence codes for optical code division multiple access.” IEE Proc. Commun. 142(3), 141–150 (1995).
    [CrossRef]
  7. W.C. Kwong et al., “2n prime-sequence code and its optical CDMA coding architecture,” Electron. Lett. 30(6), 509–510 (1994).
    [CrossRef]
  8. Y.-C. Lu et al., “A directly modulated pulse-compressed and time-multiplexed optical source for high-speed multiple-access networks,” IEEE Photon. Technol. Lett. 5(8), 905–907 (1993).
    [CrossRef]

1995

G.J. Pendock et al., “Multi-gigabit per second demonstration of photonic code-division multiplexing,” Electron. Lett. 31(10), 819–820 (1995).
[CrossRef]

W.C. Kwong, G.-C. Yang, “Construction of 2n prime-sequence codes for optical code division multiple access.” IEE Proc. Commun. 142(3), 141–150 (1995).
[CrossRef]

1994

W.C. Kwong et al., “2n prime-sequence code and its optical CDMA coding architecture,” Electron. Lett. 30(6), 509–510 (1994).
[CrossRef]

W.C. Kwong, P.R. Prucnal, “Ultrafast all-optical code-division multiple-access (CDMA) fiber-optic networks,” Computer Networks and ISDN Systems 26(6), 1063–1086 (1994).
[CrossRef]

1993

R.M. Gagliardi et al., “Fiber-optic digital video multiplexing using optical CDMA,” J. Lightwave Technol. 11(1), 20–26 (1993).
[CrossRef]

Y.-C. Lu et al., “A directly modulated pulse-compressed and time-multiplexed optical source for high-speed multiple-access networks,” IEEE Photon. Technol. Lett. 5(8), 905–907 (1993).
[CrossRef]

1989

F.R.K. Chung et al., “Optical orthogonal codes: Design, analysis, and applications,” IEEE Trans. Inform. Theory 35(3), 595–604 (1989).
[CrossRef]

1986

P.R. Prucnal et al., “Spread spectrum fiber-optic local area network using optical processing,”J. Lightwave Technol. LT-4(5), 547–554 (1986).
[CrossRef]

Chung, F.R.K.

F.R.K. Chung et al., “Optical orthogonal codes: Design, analysis, and applications,” IEEE Trans. Inform. Theory 35(3), 595–604 (1989).
[CrossRef]

Gagliardi, R.M.

R.M. Gagliardi et al., “Fiber-optic digital video multiplexing using optical CDMA,” J. Lightwave Technol. 11(1), 20–26 (1993).
[CrossRef]

Kwong, W.C.

W.C. Kwong, G.-C. Yang, “Construction of 2n prime-sequence codes for optical code division multiple access.” IEE Proc. Commun. 142(3), 141–150 (1995).
[CrossRef]

W.C. Kwong, P.R. Prucnal, “Ultrafast all-optical code-division multiple-access (CDMA) fiber-optic networks,” Computer Networks and ISDN Systems 26(6), 1063–1086 (1994).
[CrossRef]

W.C. Kwong et al., “2n prime-sequence code and its optical CDMA coding architecture,” Electron. Lett. 30(6), 509–510 (1994).
[CrossRef]

Lu, Y.-C.

Y.-C. Lu et al., “A directly modulated pulse-compressed and time-multiplexed optical source for high-speed multiple-access networks,” IEEE Photon. Technol. Lett. 5(8), 905–907 (1993).
[CrossRef]

Pendock, G.J.

G.J. Pendock et al., “Multi-gigabit per second demonstration of photonic code-division multiplexing,” Electron. Lett. 31(10), 819–820 (1995).
[CrossRef]

Prucnal, P.R.

W.C. Kwong, P.R. Prucnal, “Ultrafast all-optical code-division multiple-access (CDMA) fiber-optic networks,” Computer Networks and ISDN Systems 26(6), 1063–1086 (1994).
[CrossRef]

P.R. Prucnal et al., “Spread spectrum fiber-optic local area network using optical processing,”J. Lightwave Technol. LT-4(5), 547–554 (1986).
[CrossRef]

Yang, G.-C.

W.C. Kwong, G.-C. Yang, “Construction of 2n prime-sequence codes for optical code division multiple access.” IEE Proc. Commun. 142(3), 141–150 (1995).
[CrossRef]

Computer Networks and ISDN Systems

W.C. Kwong, P.R. Prucnal, “Ultrafast all-optical code-division multiple-access (CDMA) fiber-optic networks,” Computer Networks and ISDN Systems 26(6), 1063–1086 (1994).
[CrossRef]

Electron. Lett.

G.J. Pendock et al., “Multi-gigabit per second demonstration of photonic code-division multiplexing,” Electron. Lett. 31(10), 819–820 (1995).
[CrossRef]

W.C. Kwong et al., “2n prime-sequence code and its optical CDMA coding architecture,” Electron. Lett. 30(6), 509–510 (1994).
[CrossRef]

IEE Proc. Commun.

W.C. Kwong, G.-C. Yang, “Construction of 2n prime-sequence codes for optical code division multiple access.” IEE Proc. Commun. 142(3), 141–150 (1995).
[CrossRef]

IEEE Photon. Technol. Lett.

Y.-C. Lu et al., “A directly modulated pulse-compressed and time-multiplexed optical source for high-speed multiple-access networks,” IEEE Photon. Technol. Lett. 5(8), 905–907 (1993).
[CrossRef]

IEEE Trans. Inform. Theory

F.R.K. Chung et al., “Optical orthogonal codes: Design, analysis, and applications,” IEEE Trans. Inform. Theory 35(3), 595–604 (1989).
[CrossRef]

J. Lightwave Technol.

P.R. Prucnal et al., “Spread spectrum fiber-optic local area network using optical processing,”J. Lightwave Technol. LT-4(5), 547–554 (1986).
[CrossRef]

R.M. Gagliardi et al., “Fiber-optic digital video multiplexing using optical CDMA,” J. Lightwave Technol. 11(1), 20–26 (1993).
[CrossRef]

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Figures (5)

Figure 1
Figure 1

A two-user AO-CDM experiment. (a) Experimental setup. EDFA: erbium-doped fiber amplifier. (b) All-serial encoder or decoder.

Figure 2
Figure 2

(a) Non-return-to-zero electrical data bits “10001” (with ECL logic). (b) The resulting optical bit pattern “10001” from a gain-switched laser diode. Timebase: 5.2 ns/div.

Figure 3
Figure 3

Optical pulse from a gain-switched DFB LD.

Figure 4
Figure 4

(a) Optical pulse sequence encoded with C0 and (b) with C3.

Figure 5
Figure 5

(a) The measured autocorrelation function of C0. (b) The measured cross-correlation function of C0 with C3.

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