Integrated-optic acoustically-tunable filters for WDM networks

Smith, David A.; Baran, J. E.; Jl, Johnson; Cheung, Kmc

doi:10.1109/49.57821

Cited by 154 publications

(20 citation statements)

References 28 publications

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“…For example, in TDM networks, each switch can be set to different states during different time slots, and such a switch is called time multiplexed switch (TMS) [31], [44]. Similarly, in WDM networks there are wavelength multiplexed switches (WMS's) [9], [38] (also known as wavelength selective crossconnects (WSXC's) [46]). The second type is also sensitive to virtual channels but is more sophisticated, in that a switch of this type can transfer information from one virtual channel to another (in a transparent way).…”

Section: A Lm Versus Pmmentioning

confidence: 99%

Off-line permutation embedding and scheduling in multiplexed optical networks with regular topologies

Qiao

Mei²

1999

IEEE/ACM Trans. Networking

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There are two basic approaches for establishing a connection in a reconfigurable switched optical network, whose links are multiplexed with virtual channels (e.g., wavelengths or time slots). One is called path multiplexing (PM), in which the same virtual channel has to be used on each link along a path, and the other is link multiplexing (LM), in which different virtual channels may be used. In this paper, we focus on the problem of off-line permutation embedding and scheduling as a part of the comparative study of the multiplexing approaches. Specifically, we determine the minimum number of virtual channels per link needed for a given network to be rearrangeably nonblocking in PM and LM, respectively. We also examine the schedule length of a permutation in PM and LM when the network is blocking as a result of having an insufficient number of virtual channels per link. We found that PM and LM are equally effective in linear arrays, and LM is slightly more effective than PM in rings, meshes (grids), tori, and hypercubes. ).Publisher Item Identifier S 1063-6692(99)03379-8. 1 We have reported the results for wide-sense and strict-sense nonblocking in [29].2 Hereafter, the number of virtual channels per link is also referred to as multiplexing degree.

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Section: A Lm Versus Pmmentioning

confidence: 99%

Off-line permutation embedding and scheduling in multiplexed optical networks with regular topologies

Qiao

Mei²

1999

IEEE/ACM Trans. Networking

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“…Acousto-optic (AO) devices using interaction between optical guided waves and surface acoustic waves (SAWs) have been studied for filtering and switching of WDM signals [4][5][6][7][8][9][10][11][12][13][14][15]. Recently, in lowpower-consuming WDM networks, reconfigurable optical add/drop multiplexers (ROADMs) have been regarded as key devices and various configurations using collinear AO devices [14,16], microelectromechanical systems (MEMS) [17,18], and liquidcrystal-on-silicon (LCOS) switches [17,19] have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Noise tolerance in wavelength-selective switching of optical differential quadrature-phase-shift-keying pulse train by collinear acousto-optic devices

Goto

Miyazaki

2014

Appl. Opt.

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Optical switching of high-bit-rate quadrature-phase-shift-keying (QPSK) pulse trains using collinear acousto-optic (AO) devices is theoretically discussed. Since the collinear AO devices have wavelength selectivity, the switched optical pulse trains suffer from distortion when the bandwidth of the pulse train is comparable to the pass bandwidth of the AO device. As the AO device, a sidelobe-suppressed device with a tapered surface-acoustic-wave (SAW) waveguide and a Butterworth-type filter device with a lossy SAW directional coupler are considered. Phase distortion of optical pulse trains at 40 to 100 Gsymbols/s in QPSK format is numerically analyzed. Bit-error-rate performance with additive Gaussian noise is also evaluated by the Monte Carlo method.

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“…[2][3][4] By changing the frequency of the acoustic wave in the acousto-optic crystal, one can tune the central wavelength of the filter. Unfortunately, there are a number of limitations to the acousto-optic tunable filter (AOTF).…”

Section: Introductionmentioning

confidence: 99%

Application of Photorefractive Fiber and Waveguide Gratings to Fast Speed Narrow Band Tunable Filters

Yin¹

1999

J. Nonlinear Optic. Phys. Mat.

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In this paper, the progress of the application of photorefractive fiber and waveguide crystal gratings to a narrow band, fast speed, tunable filter is presented. This novel filter is based on tunable Bragg grating. It uses the diffraction effect of Bragg grating to select the wavelength and the electro-optic effect of the grating to tune the effective grating period. Several approaches of fabricating this type of tunable Bragg grating based filter are discussed and some preliminary results are provided. It is shown that the tuning speed of this type of filter can be in the ns range and the bandwidth can be as narrow as 0.01 nm.

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Integrated-optic acoustically-tunable filters for WDM networks

Cited by 154 publications

References 28 publications

Off-line permutation embedding and scheduling in multiplexed optical networks with regular topologies

Off-line permutation embedding and scheduling in multiplexed optical networks with regular topologies

Noise tolerance in wavelength-selective switching of optical differential quadrature-phase-shift-keying pulse train by collinear acousto-optic devices

Application of Photorefractive Fiber and Waveguide Gratings to Fast Speed Narrow Band Tunable Filters

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