Optical Technologies for Challenging Environments Talk Outline

Optical Technologies for Challenging Environments

Talk Outline • • Precision Optics Optical Coating Glass Engineering Assembly and Bonding Technologies Optical Fibre Components and Assemblies Acousto-optics Environmental Performance

Gooch & Housego: a Global Business Geographical revenues: Headcount: >500 Revenue by currency: USD 72% GBP 21% Euro 7% Global locations 8 manufacturing facilities (6 US, 2 UK) 2 R&D centres 6 Sales Offices US Asia Pacific Europe 2010 50% 20% 30% 86% of sales outside the UK 2009 60% 13% 27%

Components & Materials & Systems • • G & H is a global supplier of precision optical components & subassemblies – Acousto-optics – Electro-optics – Crystal Optics – Fibre Optics – Precision Optics Gooch and Housego is a global supplier of optical instrumentation – Hyper-spectral imaging – Optical coherence tomography – Spectroradiometers

Precision Optics • • Crystal Optics – Birefringent filters & waveplates – Rotators & depolarisers – UV through to visible wavelengths – Infra-red crystals grown in-house Prisms Windows Lenses

Super-polishing Super-polished substrates Low scatter mirrors Synchrotron Mirrors (Si) EUV Mirrors Precision Etalons Sapphire Windows (8”) Precision Polished Si Wafers Flow Cells Zerodur, fused silica, silicon carbide, sapphire, Pyrex, BK 7, filter glass Up to 18” parts

Super-polishing Proprietary Process on custom equipment Surface roughness <1Å Surfaces have extremely low scatter <5 ppm Commercial polish Roughness = 5 Å Very good polish Roughness = 1. 9 Å Superpolish Roughness = 0. 5 Å All images taken with 132 X Nomarski microscope Beyond superpolishing Roughness = 0. 2 A

Large high quality mirrors Mirror substrates – very low scatter Sizes: 13. 5” dia x 6” thick, down to 3” dia x 1” thick Up to 18” possible

Optical Coating Technologies 20 Chambers across three sites Coating Technology Resistance Source E-beam Gun Ion-assisted E-beam Ion-beam Sputtering Sol-Gel Typical Chamber sizes Bell Jar - 12” to 18” Box Coater - 500 mm to 1000 mm Sol Gel Baths - parts up to 1 m, 150 kg

Optical Coating Types AR – V, W, multiband broadband • Wavelengths 250 nm – 16 um • high laser damage threshold • (up to 3 GW/cm 2 20 ns pulses 1064 nm) HR – ultra-high reflectivity, low scatter Beamsplitters Edge Filters, Short pass, Long pass, Band pass Polarising filters Custom Dielectric Filter Dielectric Materials -Ti. O 2, Si. O 2, Ta 2 O 5, Hf. O 2, Zr. O 2, Nb 2 O 5, Al 203, Mg. F 2 Si. C etc. Metallic Materials – Cr, Ag, Au, Al, Ni, Pt, Si, Rh

Solgel Coatings

Glass Engineering • Materials • Optical & soda glass • Glass ceramic • Fused silica & crystal quartz • Ruby, sapphire, YAG etc • Ferrite and alumina ceramics • Processes • Multi-axis CNC machining • Shaping, drilling & honing • Grinding & polishing • Flat, Cylindrical, Spherical

Glass Engineering

Cleaning of Substrates • Variety of techniques chosen to suit particular substrates • Automated aqueous multistage cleaners • Proprietary spinner cleaning • Solvent vapour degreasing • Manual wiping with dry high purity chemicals • Custom designed jigging

Optical Assembly and Bonding Technologies • Extensive cleanrooms and laminar flow cabinets • Optical contacting • Cold metal bonding • Adhesive free bonding • Sol-gel bonding • Low outgassing epoxies • Paints • Mechanical assemblies • Custom design

Passive Fibre Optics • • • Fused fibre optical branching components – Wavelength combining – Power combining – Tap coupler/splitter Photonic packaging capability – Fibre coupled sources – Fibre coupled detectors Fibre optic module capability – Optical sub-assemblies

Active Fibre Optics • • Singlemode Pump lasers Multimode Pump lasers Transmission lasers Integrated Modules High Speed Detectors Acousto-Optic Modulators Ruggedised Telcordia and MIL-STD-883 and space qualified products

Photonic Packaging • • Fibre pigtailed, recepticalized & free space sources – Lasers & LEDs – SLEDs & SOAs – DFB, FP & VSELs Fibre pigtailed & recepticalized detectors – APDs & PIN diodes – Arrays – High powered fibre collimators Micro-optic devices – Thin film devices – Isolators – Fibre coupled AO Fibre coupled Isolator

Fibre optic harness for SMOS Mission • • • Low phase noise vs temperature No electromagnetic emissions Low weight and good flexibility Splitter module based of concatenated fused couplers

SMOS Satellite Soil Moisture Ocean Salinity

Case Study – Fibre Optic Gyroscopes • G & H Torquay is a key supplier of gyro coupler • EM 4 is a key supplier of gyro sources • Both supply Honeywell, G & H Torquay achieving this despite ITAR and working through a TAA • Next major programme is an upgrade of the GPS satellites that are used extensively for many global applications

Reliability • • • Regular Telcordia qualification (over 1 million components in the field) – 1221 & 1209 Harsh Environment testing – Military & avionic requirements Customer specific testing programmes – Sub-marine cable customers (outgassing & Gamma radiation) – Avionic gyroscope customers – Satellite customers – Military customers FIT rate <1 (1 FIT is 1 x 10 E 9 hours) ISO 9001 AS 9100 & SC 21 Submarine repeaters

Acousto-optics • • World leader in acousto-optic Q-switches Space qualified Acousto optic modulators UV Acousto-optic Tunable Filter for Altius payload Acousto-optic Frequency shifters for Lisa Pathfinder

Customers

Quality & Assurance • ISO 9001 • AS 9100 ---SC 21