Receiver sensitivity for optically amplified RZ signals with arbitrary duty cycle

Boivin, L.; Pendock, G.J.

doi:10.1364/oaa.1999.thb4

Cited by 22 publications

(19 citation statements)

References 2 publications

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“…In fact, a DB signal spectral width is nearly half of the NRZ-OOK format. Thus, the main consequence of the filtering process is the removal of a large portion of the ASE noise, which reduces the deleterious effects caused by beating terms ASE-ASE and signal-ASE appearing at the photodetector [18].…”

Section: Optical Filtering Cascadementioning

confidence: 99%

A Cost-Benefit Analysis on Modulation Formats for 40-Gb/s Optical Communication Systems

Silveira

Pataca

Romero

et al. 2011

Fiber and Integrated Optics

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This article discusses possible approaches for optical network capacity upgrade by considering the use of different modulation formats at 40 Gb/s. First, a performance evaluation is carried out regarding tolerance to three impairments: spectral narrowing due to filter cascading, chromatic dispersion, and self-phase modulation. Next, a cost-benefit analysis is conducted, considering the specific optoelectronic components required for the optical transmitter/receiver configuration of each format.

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Section: Optical Filtering Cascadementioning

confidence: 99%

A Cost-Benefit Analysis on Modulation Formats for 40-Gb/s Optical Communication Systems

Silveira

Pataca

Romero

et al. 2011

Fiber and Integrated Optics

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“…The ability to maintain transmission efficiency over a wide range of duty cycles, which is facilitated by high-gain and average-power limited properties of optical amplifiers [11,[343][344][345][346], allows for aggressive pulse shaping at the transmitter. This can improve receiver sensitivity and provide flexible multi-rate capabilities with simplified receiver design options [11,12,15], a subject discussed below and further in section 5.…”

Section: High Power Optical Amplifiermentioning

confidence: 99%

“…Due to the square-law detection process, like-polarized signal and noise components mix, generating S × ASE and ASE × ASE noise terms in addition to shot-noise σ 2 sh and thermal noise σ 2 th . After the postdetection filter noise-terms are given by [344,345] …”

Section: Optically Preamplified Direct Detectionmentioning

confidence: 99%

“…The SNR penalty as a function of optical and electrical bandwidths [344,345,[404][405][406]427,428] has been evaluated for a variety of waveforms and filter shapes, often numerically and for the case of optical filters with bandwidths wide relative to the signal spectrum. Below, we evaluate Gaussian-like signal-waveforms and Gaussian-opticaland postdetection-RX filters for which the impact of deviations from the matched condition on SNR can be estimated analytically [429].…”

Section: Combined Optical and Postdetection Filteringmentioning

confidence: 99%

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Laser communication transmitter and receiver design

Caplan

2007

J Optic Comm Rep

117

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Free-space laser communication systems have the potential to provide flexible, high-speed connectivity suitable for long-haul intersatellite and deep-space links. For these applications, power-efficient transmitter and receiver designs are essential for cost-effective implementation. State-of-the-art designs can leverage many of the recent advances in optical communication technologies that have led to global wideband fiber-optic networks with multiple Tbit/s capacities. While spectral efficiency has long been a key design parameter in the telecommunications industry, the many THz of excess channel bandwidth in the optical regime can be used to improve receiver sensitivities where photon efficiency is a design driver. Furthermore, the combination of excess bandwidth and average-power-limited optical transmitters has led to a new paradigm in transmitter and receiver design that can extend optimized performance of a single receiver to accommodate multiple data rates. This paper discusses state-of-the-art optical transmitter and receiver designs that are particularly well suited for average-power-limited photon-starved links where channel bandwidth is readily available. For comparison, relatively simple direct-detection systems used in short terrestrial or fiber optic links are discussed, but emphasis is placed on mature high-performance photon-efficient systems and commercially available technologies suitable for operation in space. The fundamental characteristics of optical sources, modulators, amplifiers, detectors, and associated noise sources are reviewed along with some of the unique properties that distinguish laser communication systems and components from their RF counterparts. Also addressed is the interplay between modulation format, transmitter waveform, and receiver design, as well as practical tradeoffs and implementation considerations that arise from using various technologies.

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“…Finding an accurate receiver model is a difficult problem due to the inherent complexity of the physical phenomena involved in transmission of a digital signal and a variety of optical technologies and modulation schemes presently under investigation. Recently several receiver models have been proposed [1][2][3][4][5][6][7]. In the model presented in [1], the optical filter is omitted, limiting its application to NRZ/RZ signals for a very narrow region of electrical filter bandwidths.…”

Section: Introductionmentioning

confidence: 99%

An Advanced Direct Detection Receiver Model

Djordjević

Vasić²

2004

Journal of Optical Communications

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An advanced receiver model for the optically amplified communication system (based on EDFA, Raman or hybrid Raman/EDF amplifiers) is proposed. It is independent on modulation scheme, pulse shape, type of electrical filter and type of optical filter. The channel is modeled as a stationary additive noise channel with memory (intersymbol interference-ISI), with the noise at its arbitrary statistics. The validity of the model is verified by Monte Carlo simulations for different modulation schemes like non return to zero (NRZ), return to zero (RZ), chirped return to zero (CRZ) and carrier suppressed return to zero (CSRZ) with respect to the amplifier spontaneous emission (ASE) noise. An excellent agreement is obtained for the all considered schemes.

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Receiver sensitivity for optically amplified RZ signals with arbitrary duty cycle

Cited by 22 publications

References 2 publications

A Cost-Benefit Analysis on Modulation Formats for 40-Gb/s Optical Communication Systems

A Cost-Benefit Analysis on Modulation Formats for 40-Gb/s Optical Communication Systems

Laser communication transmitter and receiver design

An Advanced Direct Detection Receiver Model

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