101-km Lightwave Undersea System Experiment at 274 Mb/s

Range, P. K.; Brackett, C.A.; Gleason, R. F.; Kalish, David; Lazay, P. D.; Meeker, T.R.; Ross, D.; Swan, C.B.; Wahl, A. R.; Wagner, Richard E.; Williams, J. C.; Jablonowski, D. P.

doi:10.1364/ofc.1982.pd7

Cited by 9 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Unrepeatered spans of more than 100 km at 140 Mbit/s [ l ] , [2] and 274 Mbit/s [3] , and of 51 km at 2 Gbitls [4] have been achieved in the laboratory. Many operational systems are being installed in several countries, on programs accelerating at a rate unthinkable a few years ago.…”

Section: Introductionmentioning

confidence: 99%

“…Striking results have been achieved recently at a wavelength of 1.55 pm where silica-based fibers have minimum attenuation [6] . Unrepeatered spans in excess of 100 km have been reported at 140 [ l ] , [2]: and 274 Mbit/s [3] . Near the wavelength of minimum chromatic dispersion, 1.3 pm, a data rate of 2 Gbit/s has been successfully transmitted over 51 km [4] .…”

Section: Introductionmentioning

confidence: 99%

“…Laser transmitters have been steadily improved also, in the amount of power which it is possible to launch into a monomode fiber [3], [7], in their spectral characteristics [ l ] , [8]', [9] and in their modulation capability. Direct detection receivers for 1.3 and 1.55 pm, using the p-i-n FET technology, now almost match the excellent performance of silicon avalanche photodiodes at 0.85 pm [IO] .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Towards the fundamental limits of optical-fiber communications

Garrett

1983

J. Lightwave Technol.

View full text Add to dashboard Cite

We review the theoretical limits which restrict transmission over optical fibers. The fundamental limit on channel capacity is 1 nat/photon with a coherent detection receiver or with a thermal-noiselimited receiver. With an ideal photon-counting receiver, the theoretical capacity is infinite. A practical limit of a few nats per photon for direct detection requires a bandwidth expansion consistent with monomode fibers and fast digital circuits and is 35-40 dB better than current direct detection receivers. This limit may be approached by receiver improvements (10 dB with direct detection, 17 dB with optimum coherent detection), by using digital pulse-position modulation (PPM) (10-13 dB) and by using error-correcting codes where constraints on system complexity allow.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Towards the fundamental limits of optical-fiber communications

Garrett

1983

J. Lightwave Technol.

View full text Add to dashboard Cite

show abstract

“…Esta limitação foi superada com o uso das fibras mono-modo padrão (Yamada et al, 1981), que removeram a dispersão modal e reduziram a perda na fibra para menos de 0,5 dB/km na região de 1, 3µm. Com a fibra mono-modo padrão, em conjunto com lasers semicondutores (GaAs) operando em temperatura ambiente, foram disponibilizados sistemas de até 274 Mb/s em 1982 (Runge et al, 1982) e logo em seguida sistemas de 1,7 Gb/s ao longo de 50 km em 1987 (JACOBS, 1995).…”

Section: Figura 21unclassified

Amplificador óptico híbrido Raman/EDFA com controle automático de ganho para redes DWDM reconfiguráveis

Oliveira¹

View full text Add to dashboard Cite

Seeking to support the massive deployment of information and communication technologies (ICTs) by means of a more efficient usage of the optical fiber infrastructure, DWDM optical networks have been undergoing a significant capacity evolution, by using advanced modulation formats for optical channels operating at data rates of 100 Gb/s and beyond, as well as by employing dynamic and reconfigurable network topologies. These new generation optical networks impose new performance benchmarks on the optical amplifiers. Specifically, the dynamic characteristics of the network make mandatory the deployment of control schemes which assure stringent optical gain spectral flatness while the usage of high-order advanced modulation formats translate into more strict margins of signal-to-noise ratios for the detected signals. In this context, this thesis proposes and experimentally evaluates an hybrid Raman/EDFA optical amplifier topology, introducing a novel automatic gain control scheme and demonstrating improved performance over the optical amplifiers already in use in DWDM reconfigurable networks. The developed hybrid optical amplifier is based on a distributed counter-propagating Raman stage, displaying excellent noise figure performance (albeit presenting low conversion efficiency-PCE) followed by an EDFA stage, which assures high output power, due to its high PCE. Flat spectral gain was achieved by means of a novel gain control technique, based on the parallel and independently acting of two control schemes, the first applied over the Raman amplifying stage, aiming at a variable target gain and low spectral gain ripple, while the other seeks to attain a fixed target gain at the EDFA, assuring a high output power.

show abstract