Optical cross-connect system in broad-band networks: system concept and demonstrators description

Johansson, S.; Lindblom, Mats; Granestrand, P.; Lagerstrom, B.; Thylén, Lars

doi:10.1109/50.233234

Cited by 42 publications

(14 citation statements)

References 10 publications

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“…The ATMOS system presents a number of very challenging device requirements, notably wavelength converters and optical storage. Fig 3, on the other hand, represents an example of a routing system [11], see also [12]. The structure in fig 3 performs routing in the space and wavelength domains.…”

Section: Systems Demonstratorsmentioning

confidence: 99%

“…Therefore the emerging very-largescale integrated circuit/liquid crystal (VLSI/LC) device technology enables the design of devices with optical inputs and outputs that can be coupled with almost any desired electronic functionality. A noteworthy illustration of such an implementation, coupling FLC material with photoaddressable silicon VLSI array of two units in a one-dimensional VLSI/FLC WTA array, has been recently proposed [ 11].…”

Section: Recent Domains Of Applicationsmentioning

confidence: 99%

“…Developments of new materials such as fast smectic A and antiferroelectric liquid crystals (AFLC) [11], with better optical quality than FLCs, (i.e. high contrast, no zig-zag defects etc.)…”

Section: Recent Domains Of Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

Spatial Light Modulators and Applications: Summaries of Papers Presented at the Spatial Light Modulators and Applications Topical Meeting Held on March 15-17, 1993 in Palm Springs, California

Quinn¹

1993

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'a," t .i iiagr~e I hour Per response, including tkte time for review. Design and fabrication aspects of a longitudinal effect PLZT spatial light modulator is described.Experimental data covering the performance in the visible wavelength region is presented. This paper presents the design and fabrication aspects of a longitudinal effect PLZT spatial light modulator designed for operation in the visible and near infrared. Included are experimental data showing the electric field induced phase shift characteristics of a 16 x 16 square array spatial light modulator. Nd:YAG laser damage threshold of bare PLZT is also presented. It is concluded that longitudinal effect PLZT spatial light modulators are rugged devices that can be used in adaptive optics, laser beam quality enhancement and beam steering applications.The following operational parameters were selected as design objectives for the demonstration of the first spatial light modulator:Number Design Aspects--A nonferroelectric PLZT material having a quadratic electro-optic and electrostrictive effects was selected to be the modulator material' 2 . The spatial light modulator configuration is schematically shown in Figure 1. In this configuration, a PLZT wafer is coated with two conductive electrodes; one electrode is optically transpsarent and the other is highly reflective. The application of a voltage in between electrodes results in an index and thickniess change in the PLZT wafer. The differential phase shift (i.e., the phase shift of light upon reflection from the back phase of PLZT when the applied voltage is zero or V) is given by a simple quadratic expression:A--n(n 2 R+2M)V 2 /Ikt where n is the index of refraction of PLZT, X refers to the wavelength of light, and R and M refer to quadratic electrostriction and electro-optic constants. By using reflected light from the second interface a factor of two increase in phase shift is obtained for an applied voltage vs a purely transmissive device. The index of refraction of PLZT (-2.5) enters as a multiplier ;n the phase shift equation. This formula also predicts that the PLZT wafer thickess needs to be minimized, consistent with voltage breakdown, -saturation, and optical-.fabrication concerns, in order to provide high phase shifts with the minimum amount of drive voltage, i.e. the device is electric field driven. AR CoatingSubstrate AR Coating .... Transparent Con-W ductive CoatingGold Pixels Figure 1. Schematic of a longitudinal effect PLZT phase modulator.The spatial light modulator, being a pixel addressable phase shift device, requires application and removal of voltages from individual pixels which can be modeled as an array of capacitors. To bring the dynamic voltage levels into an acceptable value, supported by state of the art commercial drivers, and to linearize the response, the spatial light modulator is operated with a biasing electric field. The phase shift between different pixels is then achieved by the application (removal) of differential voltages from the common bias voltage applied to ...

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Section: Systems Demonstratorsmentioning

confidence: 99%

Section: Recent Domains Of Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

Spatial Light Modulators and Applications: Summaries of Papers Presented at the Spatial Light Modulators and Applications Topical Meeting Held on March 15-17, 1993 in Palm Springs, California

Quinn¹

1993

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“…For this reason, based on intuition, such crossconnects are considered desirable, and sometimes even unavoidable [16]- [18]. There exists some evidence in the literature that there may be significant performance gains by using wavelength conversion.…”

Section: A Wavelength Conversionmentioning

confidence: 99%

Performance of WDM transport networks

Karasan

Ayanoğlu²

1998

IEEE J. Select. Areas Commun.

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Abstract-Wavelength division multiplexed point-to-point transport is becoming commonplace in wide area networks. With the expectation that the next step is end-to-end networking of wavelengths (in the optical domain without conversion to electronics), there is a need for new design techniques, a new understanding of the performance issues, and a new performance evaluation methodology in such networks. This paper describes approaches to that end, summarizes research results, and points to open problems.

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“…All-optical networks (AON) [1,2], which have attracted considerable attentions for their manageability [3,4], transparency [5][6][7][8], and flexibility [9][10][11][12][13], are considered to be the candidates for the future communication networks invariably by scholars. As an important supporting technology of optical communication systems, optical switching is taken account for the key-enabling function for the deployment of the developing all-optical networks and many efforts have been made on trying to accomplish it.…”

Section: Introductionmentioning

confidence: 99%

Single-Nanoweb Suspended Twin-Core Fiber for Optical Switching

Ma¹,

Chen²

2013

PIER M

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Abstract-A novel suspended twin-core fiber (STCF) based on a single-nanoweb structure for optical switching is proposed. The single-nanoweb structure of the STCF is an ultrathin glass membrane (nanoweb) suspended in air and adhered to the inner ring of a glass fiber capillary, which substantially provides a built-in transducing mechanism to boost the pressure-induced index change in the fiber core region of the STCF. Two fiber cores locate symmetrically in the center of the nanoweb, resulting to the mode coupling for the guiding light in the STCF. Optical and mechanical properties of the proposed STCFs under different force are numerically investigated. Optical switching based on the STCF is achieved by controlling the force applied to the STCF. Our simulations show that optical switching from one core to the other in the STCF is realized based on a low switching force of only 8 N. The performances of the optical switching based on STCFs with different structure parameters are presented.

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Optical cross-connect system in broad-band networks: system concept and demonstrators description

Cited by 42 publications

References 10 publications

Spatial Light Modulators and Applications: Summaries of Papers Presented at the Spatial Light Modulators and Applications Topical Meeting Held on March 15-17, 1993 in Palm Springs, California

Spatial Light Modulators and Applications: Summaries of Papers Presented at the Spatial Light Modulators and Applications Topical Meeting Held on March 15-17, 1993 in Palm Springs, California

Performance of WDM transport networks

Single-Nanoweb Suspended Twin-Core Fiber for Optical Switching

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