We describe the optical design of a free-space interconnect system to be used for a 32 32 sorting... more We describe the optical design of a free-space interconnect system to be used for a 32 32 sorting system. The system uses 4 f imaging relays to connect two hybrid optoelectronic complementary metal-oxide semiconductor chips. These relays are used to implement a perfect-shuffle interconnect necessary for the sorting algorithm to be implemented. The relay lenses are also used with patterned mirrors and polarizing elements to combine read beams necessary for the optoelectronic chips. Issues relating to the basic system design and the detailed design of the lenses and optomechanics are given.
We propose a new method for obtaining unidirectional operation of a ring laser using the asymmetr... more We propose a new method for obtaining unidirectional operation of a ring laser using the asymmetric properties of an absorbing Fabry-Perot 6talon.
Digital optical interconnects for networks and computing systems
Journal of Lightwave Technology, 2000
A novel model for a massively parallel digital optical link is proposed. The model predicts the l... more A novel model for a massively parallel digital optical link is proposed. The model predicts the link performance, sensitivity and power consumption. The model can be used to study the design space or the operating space for a given design. It includes a novel method to evaluate the effect of jitter, clock offset and skew, and it can be used to assist link budget. In this paper, the model is used to study a smart-pixel-based interconnect. Its predictions compare very well with measurements found in the literature
Experimental details are presented of the measured performance of a novel implementation of a cas... more Experimental details are presented of the measured performance of a novel implementation of a cascadable module for the one-dimensional perfect shuffle of a two-dimensional array of optical signals. The design uses an anamorphic telescope to correct the difference in pitch in the two axes resulting from an image split and recombine operation performed with patterned mirrors. The performance of the cylindrical lens limits the scalability of the design.
An optical circuit is successfully operated by interconnecting two arrays of 128 symmetric self-e... more An optical circuit is successfully operated by interconnecting two arrays of 128 symmetric self-electro-opticeffect devices. The holographic interconnect used in this cellular-logic image processor is described. The design issues (noise orders, efficiency, and ease of alignment) associated with the interconnect and and extensions of it are discussed.
We describe the optical design of a free-space interconnect system to be used for a 32 ϫ 32 sorti... more We describe the optical design of a free-space interconnect system to be used for a 32 ϫ 32 sorting system. The system uses 4f imaging relays to connect two hybrid optoelectronic-complementary metal-oxide semiconductor chips. These relays are used to implement a perfect-shuffle interconnect necessary for the sorting algorithm to be implemented. The relay lenses are also used with patterned mirrors and polarizing elements to combine read beams necessary for the optoelectronic chips. Issues relating to the basic system design and the detailed design of the lenses and optomechanics are given.
Design and tolerancing comparisons for S-SEED-based free-space switching fabrics
Optical Engineering, 1992
A series of experiments has been performed to determine the critical practical issues in high-den... more A series of experiments has been performed to determine the critical practical issues in high-density free-space optically interconnected systems. Some ofthese experiments have implemented switching fabrics by optically interconnecting 2-D arrays of symmetric seif-electro-optic ...
<title>Construction and tolerancing of an optical-CLIP</title>
Digital Optical Computing II, 1990
ABSTRACT An all-optical processing loop circuit, pumped entirely by semiconductor diode lasers, h... more ABSTRACT An all-optical processing loop circuit, pumped entirely by semiconductor diode lasers, has been constructed and operated. Functional features include optically programmable logic, thresholding, and synchronization; these are achieved using three bistable interference filter devices. The circuit is presently single-channel, however 15 x 15 capability of the devices has been demonstrated using Dammann holograms and array-to-array coupling of a pair of bistable plates; potential parallelism is in excess of lO. Circuit simulations and tolerancing are also described.
<title>The Prospects For Optically Bistable Devices In Digital Optical Circuits For A Simple Optical Finite State Machine</title>
Optical and Hybrid Computing, 1986
ABSTRACT The physical principles underlying logic decision making and communication for both opti... more ABSTRACT The physical principles underlying logic decision making and communication for both optics and electronics are reviewed. Research directions towards demonstration machines are indicated using the experimentally proven properties of bistable memories, logic gates, and optical transphasors. Results demonstrating a restoring optical logic, a &#39;lock and clock&#39; architecture, and a simple finite-state machine are presented.
Optical computing - Experimental demonstrations of optical digital processor circuits
Nonlinear interference filter devices, with bistable characteristics, have been used to demonstra... more Nonlinear interference filter devices, with bistable characteristics, have been used to demonstrate a number of all-optical digital circuits. These circuits demonstrate the feasibility of using optically bistable devices to construct systems of extensible all-optical logic and, ultimately, optical digital computers.
ABSTRACT The performance of a novel acylate-based thermally stable photo-polymer is presented. Ra... more ABSTRACT The performance of a novel acylate-based thermally stable photo-polymer is presented. Rapid direct writing of the guides and other structures is realized using a high-power 325 nm He:Cd laser. The loss is measured by cut-back to be less than 0.17 dB/cm at 850 nm and less than 0.5 dB/cm at 1310 nm. This material and writing system is used to make 50 micrometers square core cladded guides and compliant bumps for device attachment, and 45 degree(s) TIR mirrors for out of plane coupling.
We describe the optical design of a free-space interconnect system to be used for a 32 32 sorting... more We describe the optical design of a free-space interconnect system to be used for a 32 32 sorting system. The system uses 4 f imaging relays to connect two hybrid optoelectronic complementary metal-oxide semiconductor chips. These relays are used to implement a perfect-shuffle interconnect necessary for the sorting algorithm to be implemented. The relay lenses are also used with patterned mirrors and polarizing elements to combine read beams necessary for the optoelectronic chips. Issues relating to the basic system design and the detailed design of the lenses and optomechanics are given.
We propose a new method for obtaining unidirectional operation of a ring laser using the asymmetr... more We propose a new method for obtaining unidirectional operation of a ring laser using the asymmetric properties of an absorbing Fabry-Perot 6talon.
Digital optical interconnects for networks and computing systems
Journal of Lightwave Technology, 2000
A novel model for a massively parallel digital optical link is proposed. The model predicts the l... more A novel model for a massively parallel digital optical link is proposed. The model predicts the link performance, sensitivity and power consumption. The model can be used to study the design space or the operating space for a given design. It includes a novel method to evaluate the effect of jitter, clock offset and skew, and it can be used to assist link budget. In this paper, the model is used to study a smart-pixel-based interconnect. Its predictions compare very well with measurements found in the literature
Experimental details are presented of the measured performance of a novel implementation of a cas... more Experimental details are presented of the measured performance of a novel implementation of a cascadable module for the one-dimensional perfect shuffle of a two-dimensional array of optical signals. The design uses an anamorphic telescope to correct the difference in pitch in the two axes resulting from an image split and recombine operation performed with patterned mirrors. The performance of the cylindrical lens limits the scalability of the design.
An optical circuit is successfully operated by interconnecting two arrays of 128 symmetric self-e... more An optical circuit is successfully operated by interconnecting two arrays of 128 symmetric self-electro-opticeffect devices. The holographic interconnect used in this cellular-logic image processor is described. The design issues (noise orders, efficiency, and ease of alignment) associated with the interconnect and and extensions of it are discussed.
We describe the optical design of a free-space interconnect system to be used for a 32 ϫ 32 sorti... more We describe the optical design of a free-space interconnect system to be used for a 32 ϫ 32 sorting system. The system uses 4f imaging relays to connect two hybrid optoelectronic-complementary metal-oxide semiconductor chips. These relays are used to implement a perfect-shuffle interconnect necessary for the sorting algorithm to be implemented. The relay lenses are also used with patterned mirrors and polarizing elements to combine read beams necessary for the optoelectronic chips. Issues relating to the basic system design and the detailed design of the lenses and optomechanics are given.
Design and tolerancing comparisons for S-SEED-based free-space switching fabrics
Optical Engineering, 1992
A series of experiments has been performed to determine the critical practical issues in high-den... more A series of experiments has been performed to determine the critical practical issues in high-density free-space optically interconnected systems. Some ofthese experiments have implemented switching fabrics by optically interconnecting 2-D arrays of symmetric seif-electro-optic ...
<title>Construction and tolerancing of an optical-CLIP</title>
Digital Optical Computing II, 1990
ABSTRACT An all-optical processing loop circuit, pumped entirely by semiconductor diode lasers, h... more ABSTRACT An all-optical processing loop circuit, pumped entirely by semiconductor diode lasers, has been constructed and operated. Functional features include optically programmable logic, thresholding, and synchronization; these are achieved using three bistable interference filter devices. The circuit is presently single-channel, however 15 x 15 capability of the devices has been demonstrated using Dammann holograms and array-to-array coupling of a pair of bistable plates; potential parallelism is in excess of lO. Circuit simulations and tolerancing are also described.
<title>The Prospects For Optically Bistable Devices In Digital Optical Circuits For A Simple Optical Finite State Machine</title>
Optical and Hybrid Computing, 1986
ABSTRACT The physical principles underlying logic decision making and communication for both opti... more ABSTRACT The physical principles underlying logic decision making and communication for both optics and electronics are reviewed. Research directions towards demonstration machines are indicated using the experimentally proven properties of bistable memories, logic gates, and optical transphasors. Results demonstrating a restoring optical logic, a &#39;lock and clock&#39; architecture, and a simple finite-state machine are presented.
Optical computing - Experimental demonstrations of optical digital processor circuits
Nonlinear interference filter devices, with bistable characteristics, have been used to demonstra... more Nonlinear interference filter devices, with bistable characteristics, have been used to demonstrate a number of all-optical digital circuits. These circuits demonstrate the feasibility of using optically bistable devices to construct systems of extensible all-optical logic and, ultimately, optical digital computers.
ABSTRACT The performance of a novel acylate-based thermally stable photo-polymer is presented. Ra... more ABSTRACT The performance of a novel acylate-based thermally stable photo-polymer is presented. Rapid direct writing of the guides and other structures is realized using a high-power 325 nm He:Cd laser. The loss is measured by cut-back to be less than 0.17 dB/cm at 850 nm and less than 0.5 dB/cm at 1310 nm. This material and writing system is used to make 50 micrometers square core cladded guides and compliant bumps for device attachment, and 45 degree(s) TIR mirrors for out of plane coupling.
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Papers by Frank Tooley