J. Mellis
BT Group
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Publication
Featured researches published by J. Mellis.
Coherent Lightwave Communications: Fourth in a Series | 1990
R.C. Steele; M.C. Brain; N.G. Walker; J. Mellis; G.R. Walker; M. C. Creaner; S. Al-Chalabi; D. J. Malyon; T. J. Whitley
This paper reviews recent technological progress on coherent systems. Both devices and system developments are described, though the accent is placed on systems applications. Subjects investigated recently include stabilisation and modulation of LEC lasers, optical amplifiers, FSK based systems and phase modulation in amplifiers.
global communications conference | 1990
M.C. Brain; M.J. Creaner; R.C. Steele; D.M. Spirit; N.G. Walker; G.R. Walker; J. Mellis; S. Al-Chalabi; W. Hale; I. Sturgess; M. Rutherford; D. Trivett
A series of field experiments performed with two-wavelength transmissions at 622 Mb/s over 200-km of installed single-mode fiber using a diode-pumped erbium-doped fiber amplifier repeater are described. Both differential phase-shift keying (DPSK) modulation and frequency-shift keying (FSK) modulation were employed, along with two implementations of automated endless polarization control. In a further field experiment, a power budget of 64 dB was demonstrated in the form of repeaterless DPSK transmission at 622 Mb/s over 264 km of installed fiber. The use of such a large power budget to accommodate the sharing of power between many wavelength channels and the accumulation of spontaneous emission noise through cascaded optical amplifier repeaters is discussed.<<ETX>>
Electronics Letters | 1990
M.J. Creaner; D.M. Spirit; G.R. Walker; N.G. Walker; R.C. Steele; J. Mellis; S. Al Chalabi; W. Hale; I. Sturgess; M. Rutherford; D. Trivett; M.C. Brain
Electronics Letters | 1988
M.J. Creaner; R.C. Steele; I.W. Marshall; G.R. Walker; N.G. Walker; J. Mellis; S. Al Chalabi; I. Sturgess; M. Rutherford; J. Davidson; M.C. Brain
Electronics Letters | 1989
J. Mellis
optical fiber communication conference | 1989
M.J. Creaner; R.C. Steele; I.W. Marshall; G.R. Walker; N.G. Walker; J. Mellis; S. Al Chalabi; J. Davidson; I. Sturgess; P. Cochrane
Electronics Letters | 1990
S.A. Al-Chalabi; J. Mellis; M. Hollier; K.H. Cameron; R. Wyatt; J.E. Regnault; W.J. Devlin; M.C. Brain
Electronics Letters | 1990
M.J. Creaner; R.C. Steele; D.M. Spirit; G.R. Walker; N.G. Walker; J. Mellis; S. Al Chalabi; W. Hale; I. Sturgess; M. Rutherford; D. Trivett; M.C. Brain
Electronics Letters | 1989
J. Mellis; M.J. Creaner
Optical Communication, 1988. (ECOC 88). Fourteenth European Conference on (Conf. Publ. No.292) | 1988
J. Mellis; S.A. Al-Chalabi; K.H. Cameron; R. Wyatt; J.C. Regnault; V.J. Devlin; M.C. Brain
