Free-space optical link with spatial redundancy for misalignment tolerance

Bisaillon, Eric; Brosseau, Daniel F.; Yamamoto, Tsuyoshi; Mony, M.; Bernier, Éric; Goodwill, Dominic; Plant, David V.; Kirk, Andrew G.

doi:10.1109/68.980535

Cited by 35 publications

(19 citation statements)

References 6 publications

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“…A major practical problem of many of these applications is the requirement of strict alignment between the transmitter and the receiver in order to avoid inter-channel interference [1,2,12]. Such a system is termed "pixel matched", i.e.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional binary halftoned optical intensity channels

Mohamed¹,

Hranilovic²

2008

IET Commun.

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This paper considers the capacity of two-dimensional optical intensity channels in which transmit images are constrained to be binary-level. Examples of such links exist in holographic storage, page-oriented memories, optical interconnects, two-dimensional barcodes, as well as MIMO wireless optical links. Data are transmitted by sending a series of time-varying binary-level optical intensity images from transmitter to receiver. Strict spatial alignment between transmitter and receiver is not required nor is independence among the spatial channels assumed. Our approach combines spatial discrete multitone modulation developed for spatially frequency selective channels with halftoning to produce a binary-level output image. Data is modulated in spatial frequency domain as dictated by a water pouring spectrum over the optical transfer function as well as channel and quantization noise. A binary-level output image is produced by exploiting the excess spatial bandwidth available at the transmitter to shape quantization noise out of band. We present a general mathematical framework in which such systems can be analyzed and designed. In a pixelated wireless optical channel application, halftoning achieves 99.8% of the capacity of an equivalent unconstrained continuous amplitude channel using 1 megapixel arrays.

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Section: Introductionmentioning

confidence: 99%

Two-dimensional binary halftoned optical intensity channels

Mohamed¹,

Hranilovic²

2008

IET Commun.

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“…This approach to beam deflection, at the microscopic scale, is similar to previous work where micro-optical elements have been mounted onto finished laser arrays [9,10,11], but we are not aware of a greyscale fabrication method being employed to integrate micro-elements directly onto the device. Integration of micro-optic elements has been achieved before but has involved alternate fabrication techniques, further to the device construction [12,13].…”

Section: Introductionmentioning

confidence: 77%

Integrated polymer microprisms for free space optical beam deflecting

Reardon¹,

Falco²,

Welna³

et al. 2009

Opt. Express

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Abstract:We demonstrate beam deflection and multiple channel communication in free space optical communications using microprisms integrated directly onto an array of vertical cavity surface emitting lasers (VCSELs). The design and fabrication of such a transmitter is presented, and shown to achieve beam deflection of up to 10° in a planar configuration. A location discovery application, for use within a distributed network, is put forward and analysed.

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“…Such systems have the particular advantage of allowing for high density and -due to the use of, e.g., controllable micromirrors -for switching a light beam [11]. However, a rather serious disadvantage of such solutions is the difficulty in coupling of the whole optical system [12]. Another method of connecting optical active elements taken into consideration is the use of glass optical fiber [13] or polymer optical fibers [14][15].…”

Section: Optical Connections In Chip-to-chip Systemsmentioning

confidence: 99%