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Contents Focus Feature: Silicon Photonics

Greg Blackman addresses some of the issues involved in integrating photonics on silicon chips

Feature: Single photon detection

Tom Eddershaw investigates the technology for detecting single photons

Feature: Materials processing

With the Lasys show fast approaching, Jessica Rowbury looks at industrial laser processing and the rise of solid-state lasers for cutting thick metals


All the latest news from the European Optical Society Show preview: Lasys

A look ahead to the laser materials processing trade fair, to be held in Stuttgart this month

Show preview: CLEO

A preview of the San Jose, California conference on lasers and electro-optics

Product focus: Sensors and detectors

A round-up of the latest detector technology, including photodiodes and sensors for laser power and energy readings


The latest photonics products from around the world Suppliers’ Directory

Find the photonics suppliers you need Technology Focus

Greg Blackman discovers how a lab-on-chip device is promising to slash the cost of diagnosing tuberculosis

EDITORIAL AND ADMINISTRATIVE TEAM Tel: +44 (0)1223 211170 Fax: +44 (0)1223 213385 Editor Greg Blackman Technical writer Jessica Rowbury Technical writer Tom Eddershaw Production editor Tim Gillett Circulation/readership enquiries Pete Vine

32 38 42 42

Electro Optics is audited by the Audit Bureau of Circulations.

30 26 20 24 25 20 16 16 4

Optatec reports l 20 years of spectroscopy l EPIC news from director general Carlos Lee l Photonics to boost US manufacturing Converting light to matter l Sunlight simulator

12 12 Optics power

The optics community met recently at Optatec in Frankfurt, where further progress was made on proposals to exclude lead and cadmium used in optical glass and filters from REACH and RoHS EU regulations. The regulations could restrict development of optical components, which in turn has much wider knock-on effects for a whole range of industries. Jessica Rowbury reports from Optatec on page 4, including an update on the action taken regarding the REACH and RoHS directives. There are also feature articles on silicon photonics (page 12), which is progressing at an astonishing rate thanks to the resources being poured into the field by multinational semiconductor companies like Intel; and on single photon counting (page 16), the detectors for which have also progressed to the point where they can not only count individual photons, but give a temporal measurement as well – useful for certain fluorescence imaging techniques. There is also an article on the latest advances being made in laser materials processing on page 20, as well as a preview of Lasys on page 25. Electro Optics and our sister title, Laser Systems Europe, will be at Lasys, so please feel free to stop by our booth (4A 47) or keep up to date with news from the show at I look forward to seeing you there!

ADVERTISING Advertising manager Jon Hunt +44(0)1223 275470 Advertising production Alex Mappledoram +44(0)1223 275471 Recruitment advertising Sarah Ellis-Miller +44 (0)1223 275466

CORPORATE TEAM Chairman Dr Tom Wilkie Publishing director Warren Clark

Electro Optics is published 10 times a year by Europa Science Ltd, Unit 9, Clifton Court, Cambridge CB1 7BN, UK Tel: +44 (0)1223 211170 Fax: +44 (0)1223 213385 Web: ISSN: 0013-4589

SUBSCRIPTIONS: Free registrations available to qualifying individuals. Subscriptions £300 a year for 10 issues to readers outside registration requirements. Orders to Europa Science, Unit 9, Clifton Court, Cambridge CB1 7BN, UK. Tel: +44 (0)1223 211170. Fax: +44 (0)1223 213385. ©2014 Europa Science Ltd. Whilst every care has been taken in the compilation of this magazine, errors or omissions are not the responsibility of the publishers or of the editorial staff. Opinions expressed are not necessarily those of the publishers or editorial staff. All rights reserved. Unless specifically stated, goods or services mentioned are not formally endorsed by Europa Science Ltd, which does not guarantee or endorse or accept any liability for any goods and/or services featured in this publication. US copies: Electro Optics (ISSN 0013-4589) is published 10 times a year for £300 per year by Europa Science Ltd and distributed in the US by DSW, 75 Aberdeen Road, Emigsville PA 17318-0437. Periodicals postage paid at Emigsville PA.

POSTMASTER: Send address changes to Electro Optics, PO Box 437, Emigsville PA 17318-0437.

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