Richard Pitwon, Ken Hopkins and Dave Milward
To present work and characterisation results from a project to develop a pluggable optical connector for board to board interconnect.
Abstract
Purpose
To present work and characterisation results from a project to develop a pluggable optical connector for board to board interconnect.
Design/methodology/approach
An optical backplane connection system is described, which allows for repeatable docking and undocking of an active optical interface housed on a daughtercard to waveguides fabricated on an optical backplane.
Findings
The optical backplane connection system described has demonstrated its successful implementation with respect to optical data transfer across multimode polymer waveguides. Measurement results presented show that such a system is a viable approach toward the application of pluggable optical backplane interconnects.
Research limitations/implications
The direct connection to the exposed waveguide interface results in considerable optical loss and scattering. Future designs will have to address this. Additional work should also be undertaken to develop a means of connector engagement that is autonomous and requires no user intervention.
Originality/value
Prior research into the problem of coupling to an optical backplane has been concerned with interfaces that deflect optical signals by 90° into and out of the waveguides. Here, an alternative approach is proposed that launches light directly into the waveguide ends.
Details
Keywords
Richard C.A. Pitwon, Ken Hopkins, Dave Milward, Malcolm Muggeridge, David R. Selviah and Kai Wang
The purpose of this paper is to present the latest results from research and development into future optical printed circuit board (OPCB) interconnects and low‐cost assembly…
Abstract
Purpose
The purpose of this paper is to present the latest results from research and development into future optical printed circuit board (OPCB) interconnects and low‐cost assembly methods.
Design/methodology/approach
A novel method of high‐precision passive alignment and assembly to OPCBs was invented and a full evaluation platform developed to demonstrate the viability of this technique.
Findings
The technique was successfully deployed to passively align and assemble a lens receptacle onto an embedded polymer waveguide array in an electro‐OPCB. The lens receptacle formed a critical part of a dual lens pluggable in‐plane connection interface between peripheral optical devices and an OPCB. A lateral in‐plane mechanical accuracy of ±2 μm has been measured using this technique.
Research limitations/implications
As this is a free space optical coupling process, surface scattering at the exposed waveguide end facet was significant.
Originality/value
This paper details a novel method of passively assembling arbitrary optical devices onto multi‐mode optical waveguides and outlines the procedure and equipment required. A lens coupling solution is also presented which reduces susceptibility of a connecting optical interface to contamination.
Details
Keywords
David R. Selviah, Andy C. Walker, David A. Hutt, Kai Wang, Aongus McCarthy, F. Anibal Fernández, Ioannis Papakonstantinou, Hadi Baghsiahi, Himanshu Suyal, Mohammad Taghizadeh, Paul Conway, John Chappell, Shefiu S. Zakariyah, Dave Milward, Richard Pitwon, Ken Hopkins, Malcolm Muggeridge, Jeremy Rygate, Jonathan Calver, Witold Kandulski, David J. Deshazer, Karen Hueston, David J. Ives, Robert Ferguson, Subrena Harris, Gary Hinde, Martin Cole, Henry White, Navin Suyal, Habib ur Rehman and Chris Bryson
The purpose of this paper is to provide an overview of the research in a project aimed at developing manufacturing techniques for integrated optical and electronic interconnect…
Abstract
Purpose
The purpose of this paper is to provide an overview of the research in a project aimed at developing manufacturing techniques for integrated optical and electronic interconnect printed circuit boards (OPCB) including the motivation for this research, the progress, the achievements and the interactions between the partners.
Design/methodology/approach
Several polymer waveguide fabrication methods were developed including direct laser write, laser ablation and inkjet printing. Polymer formulations were developed to suit the fabrication methods. Computer‐aided design (CAD) tools were developed and waveguide layout design rules were established. The CAD tools were used to lay out a complex backplane interconnect pattern to meet practical demanding specifications for use in a system demonstrator.
Findings
Novel polymer formulations for polyacrylate enable faster writing times for laser direct write fabrication. Control of the fabrication parameters enables inkjet printing of polysiloxane waveguides. Several different laser systems can be used to form waveguide structures by ablation. Establishment of waveguide layout design rules from experimental measurements and modelling enables successful first time layout of complex interconnection patterns.
Research limitations/implications
The complexity and length of the waveguides in a complex backplane interconnect, beyond that achieved in this paper, is limited by the bend loss and by the propagation loss partially caused by waveguide sidewall roughness, so further research in these areas would be beneficial to give a wider range of applicability.
Originality/value
The paper gives an overview of advances in polymer formulation, fabrication methods and CAD tools, for manufacturing of complex hybrid‐integrated OPCBs.
Details
Keywords
Online catalogs from 67 libraries using NOTIS software were searched using Internet connections to determine the positional operators selected as the default keyword operator on…
Abstract
Online catalogs from 67 libraries using NOTIS software were searched using Internet connections to determine the positional operators selected as the default keyword operator on each catalog. The diverse results indicated that there is no standard default positional operator.
This exploration of management history focuses on mass entertainment media to determine the history of the efficiency expert in popular culture. It reviews the history of the…
Abstract
This exploration of management history focuses on mass entertainment media to determine the history of the efficiency expert in popular culture. It reviews the history of the image of the efficiency expert in film and on American‐produced television programs. The review shows that this profession is a universal and pervasive one, permanently embedded in our culture and catholic in background, occupation and workplace. It is generally a man’s job. The most significant historical trend is a sharp change from the efficiency expert as an amusing and relatively harmless character to a malevolent one who is to be feared. Although television has only existed for about half as long as motion pictures, the depiction of the efficiency expert on TV is similar to his movie image. This widely recognized profession needs no introduction to the viewer. He is a negative figure, often laughed at but never admired.
Details
Keywords
1. Documentation, library and book organizations (0) American Documentation Institute
Kjeld Harald Aij and Maurits Teunissen
Emphasis on quality and reducing costs has led many health-care organizations to reconfigure their management, process, and quality control infrastructures. Many are lean, a…
Abstract
Purpose
Emphasis on quality and reducing costs has led many health-care organizations to reconfigure their management, process, and quality control infrastructures. Many are lean, a management philosophy with roots in manufacturing industries that emphasizes elimination of waste. Successful lean implementation requires systemic change and strong leadership. Despite the importance of leadership to successful lean implementation, few researchers have probed the question of ideal leadership attributes to achieve lean thinking in health care. The purpose of this paper is to provide insight into applicable attributes for lean leaders in health care.
Design/methodology/approach
The authors systematically reviewed the literature on principles of leadership and, using Dombrowski and Mielke’s (2013) conceptual model of lean leadership, developed a parallel theoretical model for lean leadership in health care.
Findings
This work contributes to the development of a new framework for describing leadership attributes within lean management of health care.
Originality/value
The summary of attributes can provide a model for health-care leaders to apply lean in their organizations.
Details
Keywords
Aarhus Kommunes Biblioteker (Teknisk Bibliotek), Ingerslevs Plads 7, Aarhus, Denmark. Representative: V. NEDERGAARD PEDERSEN (Librarian).
The purpose of this paper is to present the initial relationship between the Classification Research Group (CRG) and the Center for Documentation and Communication Research (CDCR…
Abstract
Purpose
The purpose of this paper is to present the initial relationship between the Classification Research Group (CRG) and the Center for Documentation and Communication Research (CDCR) and how this relationship changed between 1952 and 1970. The theory of normative behavior and its concepts of worldviews, social norms, social types, and information behavior are used to characterize the relationship between the small worlds of the two groups with the intent of understanding the gap between early classification research and information retrieval (IR) research.
Design/methodology/approach
This is a mixed method analysis of two groups as evidenced in published artifacts by and about their work. A thorough review of historical literature about the groups as well as their own published works was employed and an author co-citation analysis was used to characterize the conceptual similarities and differences of the two groups of researchers.
Findings
The CRG focused on fundamental principles to aid classification and retrieval of information. The CDCR were more inclined to develop practical methods of retrieval without benefit of good theoretical foundations. The CRG began it work under the contention that the general classification schemes at the time were inadequate for the developing IR mechanisms. The CDCR rejected the classification schemes of the times and focused on developing punch card mechanisms and processes that were generously funded by both government and corporate funding.
Originality/value
This paper provides a unique historical analysis of two groups of influential researchers in the field of library and information science.