152 photons per bit detection at 622 Mbit/s to 2.5 Gbit/s using an erbium fibre preamplifier

Smyth, P.P.; Wyatt, R.; Fidler, Aleš; Eardley, Philip; Sayles, A.A.; Craig-Ryan, S.P.

doi:10.1049/el:19901028

Cited by 37 publications

(3 citation statements)

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“…The BER is set at 10 À9 for sensitivity calculations unless stated otherwise. To be physically realistic regarding the EDFA, and in keeping with optically preamplified PPM work [4,5], several of the parameters were drawn from the experimental work of Reference [8], in particular gain G ¼ 27 dB, spontaneous emission parameter n sp ¼ 1.08, optical bandpass filter bandwidth B opt ¼ 76.1 GHz. Additionally a quantum efficiency for the PIN photodiode of unity is assumed.…”

Section: Resultsmentioning

confidence: 99%

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Performance evaluation of optically preamplified dicode pulse position modulation receivers

Al-Suleimani

Phillips

Woolfson

2007

Trans Emerging Tel Tech

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SUMMARYAn analysis for optically preamplified dicode pulse position modulation (DiPPM) receivers is presented for the first time. The performance at two different bit rates (622 Mbit/s and 2.5 Gbit/s) is analysed and compared with equivalent optically preamplified pulse position modulation (PPM) and on-off keyed nonreturn-to-zero (OOK NRZ) systems. Additionally a new derivation for the average power of the DiPPM pulse stream is provided and the sensitivity performance is compared with that obtainable from a previous formula, with results that are somewhat more conservative. For optically preamplified systems it is shown that PPM significantly outperforms DiPPM and OOK NRZ, when using the DiPPM average power formula derived here, but DiPPM could still show a sensitivity benefit over OOK NRZ of 4.2 dB.

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Section: Resultsmentioning

confidence: 99%

“…Optical preamplification is known to provide significant sensitivity benefits [7][8][9] and has been considered in conjunction with optical PPM receivers to form very sensitive receiver configurations [4,5]. However, till now, work on dicode PPM has not considered receiver schemes using optical preamplifiers.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of optically preamplified dicode pulse position modulation receivers

Al-Suleimani

Phillips

Woolfson

2007

Trans Emerging Tel Tech

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“…Upon reaching this point, the optical field mixes with the local oscillator field at the photodetector. The optical field can be further written as (4) According to the square law, the detected signal current after the electrical filter is given by [16] (5) where denotes the overall optoelectronic conversion factor of the detection system; is the electrical transfer function of the photodetector, electrical amplifier, and electrical bandpass filter. Applying (4) into (5), we have (6) where represents the input signal power after the optical filter, is the average ASE power after filtering with optical bandwidth , and is the local oscillation power.…”

Section: B Noise Analysismentioning

confidence: 99%

Reducing ASE Effect in Coherent Detection by Employing Double-Pass Fiber Preamplifier and Time-Domain Filter

Chen

Mark

Burnham

et al. 2009

IEEE J. Quantum Electron.

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Abstract-We report on a novel fiber based coherent detection system employing a double-pass fiber preamplifier, a spectral bandpass filter, and a time-domain filter. The time-domain filter, a synchronous time gate, reduces the in-band amplified spontaneous emission (ASE) beat noise, which cannot be achieved by the spectral bandpass filter alone. The double-pass fiber amplifier further reduces the out-band ASE by about 20 dB with a fiber Bragg grating (FBG) at the end of the fiber amplifier. In preliminary experiments with a 100 GHz bandpass filter, no degradation is observed from the optically preamplified coherent detection compared to pure coherent detection. With a 10 ns pulse width, 500 kHz repetition rate, and 10 pW average input power, about 2 dB and 1 dB signal-to-noise ratio (SNR) improvements are achieved when 5% and 50% time gating duty cycles are used, respectively.

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Sensitivity evaluation of EDFA PPM systems under chromatic dispersion

Hussain

Elmirghani

Cryan

1996

Microw. Opt. Technol. Lett.

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I = 0 mm, 1 = 7.5 mm, and 1 = 12.5 mm). For a patch without slots, the current flows primarily in a straight line from one side to the other. From Figures 5(b) and 5k), it is clear that the presence of the slots forces the current to travel through a much longer path. This explains the decrease in the resonance frequency of the meander patch antenna. Also, it is evident from the figures that the patch length of the current flow increases with increasing slot length. This confirms the experimental observation of the reduction in the resonant frequency with an increase of the slot length. From the figures it is also clear that an increase in the slot width does not significantly increase the path length to the flow of the current. This validates the earlier results that the change in the slot width does not bring any significant change in the resonance frequency. CONCLUSIONThe design of a compact meander patch antenna has been presented. The length of the antenna is 70% less than that of a half-wave microstrip patch antenna. It is anticipated that this design will find application in hand-held communication systems where light weight and compactness are the most desirable criteria. Mbit/ s and h = 1.53 p m is analyzed, and is shown to offer a sensiticQ benefit of 9.2 dB oc,er an equiralent OOK system. Fiber chromatic dispersion is taken into account and is used to estimate the receiced pulse shape. Pulse dispersion can potentially induce a significant performance penalty in PPM system because of the temporal nature of the PPM format. Thr results show that for a transmitted pulse of duration 80 ps, the receiced pulses have full widths at half maximum (FWHM) of 160 and 320ps forfiber lengths equaling 120 and 240 km, respectiL,ely. The system sensitivity degradation due to dispersion is explicitly eilaluated. It is shown that a sensitivivpenal(y of up to 5 dB can be incurred over the transmission spans considered. 0 ABSTRACT An optically preamplified pulse position modulation (PPM) system operating at 622

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152 photons per bit detection at 622 Mbit/s to 2.5 Gbit/s using an erbium fibre preamplifier

Cited by 37 publications

References 1 publication

Performance evaluation of optically preamplified dicode pulse position modulation receivers

Performance evaluation of optically preamplified dicode pulse position modulation receivers

Reducing ASE Effect in Coherent Detection by Employing Double-Pass Fiber Preamplifier and Time-Domain Filter

Sensitivity evaluation of EDFA PPM systems under chromatic dispersion

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