Coherent optical transmission at 565 Mbit/s through five cascaded photonic amplifiers

Malyon, D.J.; Steele, R.C.; Creaner, M.J.; Brain, M.C.; Stallard, W.A.

doi:10.1049/el:19890246

Cited by 11 publications

(3 citation statements)

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“…Studies on travelling (or near travelling) wave semiconductor laser amplifiers (TWAs) have been intensified recently [1][2][3][4]. At present, the commonly used technique of fabricating the TWAs is applying antireflection (AR) coatings on the facets of the ordinary semiconductor diodes [5,6].…”

Section: Introductionmentioning

confidence: 99%

Studies on Active Monitoring Method Adopted to AR Coat Semiconductor Amplifiers

Chen¹,

Lu²,

Li³

et al. 1991

Journal of Optical Communications

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It has been realized that the signal used to control the AR film deposition on the semiconductor diode facets with the active monitoring method (AMM) is related to the relative change of the output power P with respect to the injection current I, instead of P. In order to study the AMM, the rate equations have been employed to analyse the variation of dP/dl with the reflectivity of the facet being coated. The results reveal that the time evolution of the derivative during the film deposition follows almost the same pattern. This has led to the establishment of a new criterion aiding the control of the film deposition for the AMM and provided the possibility of making full use of the on-time information available with the AMM. The coating experiments have confirmed the theoretical predictions, and the reliability of the film control has also been improved substantially with the effective use of the new criterion.

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Section: Introductionmentioning

confidence: 99%

Studies on Active Monitoring Method Adopted to AR Coat Semiconductor Amplifiers

Chen¹,

Lu²,

Li³

et al. 1991

Journal of Optical Communications

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“…Semiconductor TWAs were demonstrated as early as 1982 [85], and broad-band, high-output-power, low noise and polarization insensitive signal-gain have been shown to be achievable in TWA's. As many as 5 laser TWAs have been cascaded to provide communications at 565 Mbit/s through a total loss of 112 dB with differential phase shift keying (DPSK) heterodyne detection [66]. A multiwavelength system has been demonstrated using a semiconductor TWA to provide between 6 Laser amplifiers can also be constructed in fiber using the Raman or Brillouin effects.…”

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confidence: 99%

Architectures for future multigigabit lightwave networks

Burr¹

1990

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“…repeaters were inserted into the system described above, making five amplifiers in all [13]. The measured power budget for the unrepeatered system was 4 5 .…”

Section: 44mentioning

confidence: 99%

DPSK coherent field demonstration system, and use of optical amplifier repeaters

Brain

IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond

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Continued growth in traffic, an emerging demand for transparency, and the development of new services, all place additional burdens on the capacity of telecommunications transmission and switching systems. Coherent transmission may allow high-density WDM systems and passively-routed networks to be realised using existing optical fibre, combined with simple optical amplifier repeaters, by providing the necessary wavelength selectivity and increased power budget. This paper describes practical progress towards these objectives. The first field demonstration of a 565 Mbit/s DPSK heterodyne system in the operational environment is described, using miniaturised external cavity lasers and automated endless polarisation control. The paper goes on to report improvements in receiver performance, and transmission experiments using a cascade of semiconductor optical amplifiers and an erbium-doped fibre amplifier repeater.

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Coherent optical transmission at 565 Mbit/s through five cascaded photonic amplifiers

Cited by 11 publications

References 1 publication

Studies on Active Monitoring Method Adopted to AR Coat Semiconductor Amplifiers

Studies on Active Monitoring Method Adopted to AR Coat Semiconductor Amplifiers

Architectures for future multigigabit lightwave networks

DPSK coherent field demonstration system, and use of optical amplifier repeaters

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