Low detection penalty in an optical DPSK heterodyne system using a saturated optical amplifier as phase modulator

Hoa, D. Hui Bon; Ligne, M. Le; O’Hare, A.

doi:10.1109/50.65885

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…4 and Fig. Three amplitude levels are obtained in the receiver as shown in [3] due to unwanted amplitude modulation. Three amplitude levels are obtained in the receiver as shown in [3] due to unwanted amplitude modulation.…”

Section: Effect Of Phase-amplitude Distortion On Dpskmentioning

confidence: 99%

“…It has been shown [1][2][3][4][5][6] that an injection locked semiconductor laser amplifier can be used as an optical phase modulator in coherent transmission systems. As a consequence of the intrinsic properties of the semiconductor material, modulation of the laser amplifier bias current will yield both amplitude modulation (AM) and phase modulation (PM) of the optical output signal.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Two-section Semiconductor Laser Amplifier used as Phase Modulator in a DPSK Heterodyne System

Ligne¹,

Gleau²,

Hoa³

et al. 1994

Journal of Optical Communications

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This paper presents a two-section near traveling wave optical amplifier used as an external modulator accomplishing phase modulation. A DPSK heterodyne system has been simulated and the eye diagram has been obtained by numerical large-signal analysis at 0.5 and 2.5 Gbit/s. The analysis shows how it is possible to carry out high bit rate by adjustment of the ratio of the modulation currents of two sections. This device can have an important impact on broadband optical networks.

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Section: Effect Of Phase-amplitude Distortion On Dpskmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two-section Semiconductor Laser Amplifier used as Phase Modulator in a DPSK Heterodyne System

Ligne¹,

Gleau²,

Hoa³

et al. 1994

Journal of Optical Communications

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“…The SOA used in the fiber ring laser not only can be used as a gain medium to amplify the lights travelling in the ring, and but also can be taken as a phase modulator for the message encoding. 13 An input light containing the information of the message could be coupled into the SOA-based FRL via an optical coupler and the phase of the travelling light in the fiber loop can be altered dynamically by this input light, based on an effect of the cross-phase modulation (XPM) in the SOA. There are two advantages in the use of the SOA in our scheme.…”

Section: Introductionmentioning

confidence: 99%

Optical chaos communication with a dynamical SOA-based fiber ring laser

Wang

Huang

2004

SPIE Proceedings

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An experimental system used for the optical chaos communication with a semiconductor optical amplifier (SOA) based fiber ring laser as a dynamical light system is presented. The chaotic polarization dynamic of the light source is modulated through a cross phase modulation (XPM) effect in the SOA induced by the input light carrying the message. A chaos receiver based on a time-delayed configuration can establish the synchronization with the transmitter and the message is restored by a dynamical detection for the states of polarization (SOPs) of transmission lights. A fiber link of 1-km long was used as the communication channel. The round-trip time and SOPs of the ring in this system can be used as key parameters to establish the synchronization between the transmitter and receiver. The polarization dynamics of the system were investigated under different input optical powers, and an experiment for the optical chaos communication was carried out, in which the 16-bit RZ sequences at 140 Mb/s were successfully recovered from the chaotic carriers after 1-km long transmission.

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“…optical beam forming networks [l]. Recently, various experiments have demonstrated the feasibility of using optical amplifiers as phase modulators in optical communication systems [2]- [4]. These phase modulators provide the advantages of gain and low modulation power requirements.…”

mentioning

confidence: 99%