Misalignment distortion penalty in moderate-speed directly modulated WDM systems and its reduction using fiber Bragg grating lasers

Liu, K.; Wang, W.K.

doi:10.1109/68.643300

Cited by 8 publications

(3 citation statements)

References 8 publications

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“…The thermal noise is a zero mean Gaussian noise with variance [50] (22) where is the Boltzman's constant, is the absolute temperature, is the electronic preamplifier noise figure, and is the load resistor.…”

Section: B Signal and Noise Representationmentioning

confidence: 99%

“…In the past, the cascadability of different types of optical MUXs/DMUXs was studied both theoretically [2]- [18] and experimentally [11], [18]- [24] for several bit rates, channel spacings, modulation formats, and other system considerations. Most attention was concentrated on arrayed waveguide grating (AWG) routers [6], [11], [13], [17], [19]- [22], [24], MUXs/DMUXs composed of multilayer interference (MI) filters [4], [5], [8], [10], [14], [17], [18], and MUXs/DMUXs composed of fiber Bragg grating filters [14], [15], [23]. General studies, not bound to a specific optical MUX/DMUX type, but based on arbitrary transfer functions, also exist, e.g., [7] and [16].…”

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confidence: 99%

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Accurate modeling of optical multiplexer/demultiplexer concatenation in transparent multiwavelength optical networks

Roudas¹,

Antoniades²,

Otani³

et al. 2002

J. Lightwave Technol.

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This paper presents an accurate theoretical model for the study of concatenation of optical multiplexers/demultiplexers (MUXs/DMUXs) in transparent multiwavelength optical networks. The model is based on a semianalytical technique for the evaluation of the error probability of the network topology. The error-probability evaluation takes into account arbitrary pulse shapes, arbitrary optical MUX/DMUX, and electronic low-pass filter transfer functions, and non-Gaussian photocurrent statistics at the output of the direct-detection receiver. To illustrate the model, the cascadability of arrayed waveguide grating (AWG) routers in a transparent network element chain is studied. The performance of the actual network is compared to the performance of a reference network with ideal optical MUXs/DMUXs. The optical power penalty at an error probability of 10 9 is calculated as a function of the number of cascaded AWG routers, the bandwidth of AWG routers, and the laser carrier frequency offset from the channel's nominal frequency. Index Terms-Error analysis, optical filters, optical receivers. I. INTRODUCTION I N TRANSPARENT multiwavelength optical networks, each lightwave signal may be optically multiplexed/demultiplexed several times during propagation from its source to its destination [1]. Optical multiplexers/demultiplexers (MUXs/DMUXs) exhibit nonideal amplitude and phase transfer functions within the optical signal band. That is, their amplitude transfer functions might present passband curvature, tilt, and ripple. In addition, their phase transfer functions might not vary linearly with frequency. These impairments are enhanced when a large number of these devices are cascaded together. Consequently, optical MUX/DMUX concatenation

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Section: B Signal and Noise Representationmentioning

confidence: 99%

mentioning

confidence: 99%

Accurate modeling of optical multiplexer/demultiplexer concatenation in transparent multiwavelength optical networks

Roudas¹,

Antoniades²,

Otani³

et al. 2002

J. Lightwave Technol.

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show abstract

“…Any misalignment between grating filter and laser wavelength will cause the grating filter to act as a frequency discriminator and convert chirp to amplitude distortion, which results in system penalty [6]. Power penalty is strongly influenced by the wavelength dependent transfer function from the II (12) port to the O2 (Ol) port for the UT-OXC device especially when a narrow-band grating filter is used.…”

Section: Wavelength Misalignmentmentioning

confidence: 99%

Experimental Investigation of the Critical Issues on Optical Cross-connect Devices using Fiber-Bragg-gratings

Liaw¹,

Chi²,

Ho³

2000

Journal of Optical Communications

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We propose transmission-and reflection types, unidirectional and bidirectional optical cross-connect (OXC) devices based on fiber Bragg gratings. Power penalties induced from several possible impairments such as interaction length effect, intraband crosstalk and misalignment between laser source and grating filter are experimentally investigated. If 1.0 dB power penalty can be tolerated for the OXC device, the interaction length can be up to 20 meter, while the intraband crosstalk and wavelength misalignment should be less than -18 dB and ±0.2 nm, respectively.

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10 Gbit/s directly modulated, high temperature-stability external fibre grating laser for dense WDM networks

et al. 1999

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Misalignment distortion penalty in moderate-speed directly modulated WDM systems and its reduction using fiber Bragg grating lasers

Cited by 8 publications

References 8 publications

Accurate modeling of optical multiplexer/demultiplexer concatenation in transparent multiwavelength optical networks

Accurate modeling of optical multiplexer/demultiplexer concatenation in transparent multiwavelength optical networks

Experimental Investigation of the Critical Issues on Optical Cross-connect Devices using Fiber-Bragg-gratings

10 Gbit/s directly modulated, high temperature-stability external fibre grating laser for dense WDM networks

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