Solution Science for Research and Industry

Posts tagged “diode

From near absolute to over one thousand degrees – Lake Shore have a sensor to suit

With the UK’s record breaking hot weather continuing, we thought you might like to know that Lake Shore Cryotronics offer four types of sensor for temperature measurement:

Diodes
A diode temperature sensor is the general name for a class of semiconductor temperature sensors. They are based on the temperature dependence of the forward voltage drop across a p-n junction. The voltage change with temperature depends on the material. The most common is Silicon, but Gallium Arsenide (GaAs) and Gallium Aluminium Arsenide (GaAlAs) are also used.

Resistors
These sensors are based on the change of resistance with temperature, and can be classified as positive temperature coefficient (PTC) or negative temperature coefficient (NTC). Platinum RTDs are the best example of PTC resistance sensors.

Capacitors
Capacitors are also used for low temperatures, but usually not for temperature measurement. Capacitance temperature sensors have the advantage of being insensitive to magnetic fields, but they commonly experience calibration shifts after thermal cycling.

Thermocouples
Thermocouples are only useful where differential temperature measurements or low mass are the main consideration. They must be calibrated in-situ as the entire length of the wire contributes to the output voltage if it traverses a temperature gradient.

Each type sensor has its own particular advantages in terms of temperature range and response, as well as design features and drawbacks, so Elliot Scientific recommends contacting us to discuss your application and its requirements.

Lake Shore also do some nice instruments to go with their sensors!

 

 

 

 

 


July 2017 Newsletter Out Now

July 2017 NewsletterThe Elliot Scientific July newsletter is now available. In this issue we cover the new products announced at LASER World of Photonics last month by our principals. Gamma Scientific: two new spectroradiometers. HOLOEYE: the new PLUTO-2 driver for Spatial Light Modulators. Fibercryst: higher power from the new FEMTO-30 laser. CryoSpectra: A new 1 kW cooling capacity cryorefrigerator. NoIR LaserShields: New frames added to their range. Plus photos from the trade show and more…

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May 2017 Newsletter Out Now

May 2017 NewsletterThe Elliot Scientific May newsletter is now available. In this issue we reveal the latest in miniature spectrometers from Spectral Products, admire a really low-noise diode laser controller from Vescent Photonics, highlight our new brochure for 2017, take a look at the sturdy polarising filters manufactured by CODIXX, and hear how adjuster screw sets from Kozak Micro are superior in pitch to anything else, plus forthcoming events and much more…

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Lake Shore’s Cryogenic Temperature Sensors now on elliotscientific.com

Lake Shore offers four types of sensor for cryogenic temperature measurement based on voltage (diodes) or resistance. Each has its own advantages and disadvantages, and these can be easily seen at-a-glance via our new Cryogenic Temperature Sensors page.

For example: Of the three most common NTC resistor materials, sputter-deposited zirconium oxy-nitride aka Cernox™ – the others being Germanium and Ruthenium Oxide (Rox™) – is the most versatile. Cernox™ thin film resistors are only manufactured by Lake Shore Cryotronics, and incorporated into robust sensor packages.

Cernox™ works over a broad temperature range, does not follow a standard curve, has sensitivity below 1 K, and is highly resistant to ionising radiation and magnetic field-induced errors. These features can be instantly seen on the page via our colourful graphics:

 0.1 to 420  ✘  ✔  ✔  ★★★ (1 K +)

In all, nine different temperature sensor materials are detailed and an informative datasheet is available to download. However, Elliot Scientific still recommends contacting us for expert advice on sensor choice for your application.


More laser safety filters from NoIR LaserShields

female-31NoIR LaserShields continues to expand their range of CE-approved filters for laser safety. Recent additions include the CT2 for use in the visible, and CTR, HYG and YGH filters for the infrared region of the spectrum.

NoIR have been manufacturing high-quality internationally-certified safety eyewear for the protection of laser users in a broad range of fields and applications for many years now, offering protection from:

  • UV, visible, and IR lasers and other ultra-bright light sources
  • Multiple waveband devices
  • Therapeutic and cosmetic treatments (Patients and clinicians)
  • Laser pens (For pilots and the emergency services)

Elliot Scientific’s expert advice will guide you to the best in cost-effective laser safety. Academics, beauticians, clinicians et al, we can protect your eyes from laser mishaps.

Contact us with details of your laser or ultra-bright light source application and we will be happy to help you choose the correct filters for spectacle frames or goggles.


Non-contact Visible Fault Location in fibre added to OZ Optics range

OZ Optics Non-contact VFLOZ Optics has expanded its range of Visible Fibre Optic Fault Locators with the addition of a benchtop non-contact tester, the ideal solution for inspecting devices with no connectors on the fibre ends. Visible Fibre Optic Fault Locators launch either 520 or 635 nm laser diode light into a fibre to enable discovery of breaks or sharp bends, which are revealed by the resulting scattered light emerging from the sides of the cable.

Fault locators are now available in four models: two benchtop and two portable…

  • Benchtop Non-Contact, for CW and pulsed operation
  • Benchtop CW High Power only
  • Portable pen – CW only
  • ‘Pocket size’ offering CW or pulsed output

Pulse modulation aids in locating faults under high ambient light conditions and improves battery life. 2 Hz modulation is easy to detect with the naked eye, while 270 Hz and 2 kHz pulse modulation modes are used for fibre identification by detectors.


New DAli 3: Latest in automated alignment for fibre optics and waveguides

E2300SQ500The Elliot Scientific DAli 3 is the latest version of our popular automated photonic device alignment system for the following applications:

•  Fibre-to-laser diode alignment
•  Fibre-to-waveguide alignment
•  Fibre-to-fibre coupling
•  Fibre array-to-device alignment
•  Compensation for epoxy drift during pigtailing
•  Compensation for drift during long-term characterisation
•  Simultaneous alignment of input & output fibers (or arrays) to waveguide device

A typical DAli 3 system now consists of our new 3-channel E1100 piezo controller, the USB-equipped DAli 3 interface, and a PC or laptop for driving the easy to use software. Although designed to complement the piezo-driven versions of the Elliot Gold™ Series range of flexure stages, it is also suited to other piezo devices working on 0 to 150 volts.

DAli 3 incorporates the latest in electronics and uses complex software algorithms to quickly deliver precision automated alignment. It does this by locating and optimising an optical feedback signal derived from the components being aligned. It then adjusts their relative position to optimise the signal and therefore their accurate alignment.

The software and hardware package includes many features to enhance use, while also providing the necessary flexibility to allow it to be incorporated into a wide range of photonic alignment tasks for development, test and production applications.


December 2015 Newsletter Out Now

December 2015 NewsletterThe Elliot Scientific December newsletter is now available. In this issue, Elliot Scientific and OZ Optics show off their glass-wares, Integrated Optics reveals the new MatchBox 2 series of compact lasers, Micro Laser Systems unveils new collimators for the SWIR waveband, Winter holidays and more.

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Next week, we are in Oxford for Quantum UK 2015

ELLblurred2Quantum UK 2015 will be the first in a series of annual meetings of the UK Quantum Technology Hub Network that was established by the UK government to accelerate the transition of quantum technologies from research to industry.

Elliot Scientific will be attending this meeting, that takes place at St John’s College, Oxford, from the 28th to the 30th of September. We will be exhibiting a wide variety of our systems, solutions, technologies, and products – both home-grown and from the companies we represent based in the USA, Asia and Europe.

The four Quantum Technology Hubs led by the universities of Oxford, York, Glasgow and Birmingham. They are focussed on:

  • Quantum computing
  • Quantum secure communications
  • Quantum-enhanced imaging
  • Quantum-enabled sensing

The conference will discuss the progress, strategy and technical challenges for all these sectors, and will bring together industry, academics, and government with the aim of stimulating new projects and standardising more mature technologies. Contact us for more information.


New additions to laser safety filters from NoIR LaserShields

female-31NoIR LaserShields has had ten of their existing filters for laser safety CE-approved. These are the: 10, 50, 60, 90, 92, 5032, 6032, RT1, RT2 and YG4.

NoIR also revealed, at the recent Laser World of Photonics exhibition, a breakthrough polymer filter for Holmium-doped fibre lasers operating between 2 and 3 microns – the HOY.

NoIR have been manufacturing high-quality internationally-certified safety eyewear for the protection of laser users in a broad range of fields and applications for many years now, offering protection from:

  • UV, visible, and IR lasers
  • Multiple waveband devices
  • Therapeutic and cosmetic treatments (Patients and Clinicians)
  • Laser pens (Pilots and Police)

Elliot Scientific’s expert advice will guide you to the best in cost-effective laser safety. From academics, beauticians and clinicians… we protect the alphabet of laser users. Contact us with details of your laser or application and we will be happy to help you choose the correct filters, spectacle frames or goggles.


Atom Optics & Spectroscopy benefit from Photodigm Laser Diodes

Photodigm specialises in manufacturing high power single spatial and longitudinal mode laser diodes. By incorporating their proprietary DBR – Distributed Bragg Reflector – technology within a monolithic architecture, Photodigm delivers unequalled performance for researchers requiring excellent spectral purity and superior beam quality with high output powers, whilst ensuring long term reliability and stability. Typical high-resolution spectroscopy applications include:

  • Atomic and Molecular Optical Physics
  • Cold Atom Spectroscopy & Precision Instrumentation, for example:Photodigm logo
    • Advanced gravimeters
    • Magnetometers
    • Atomic clocks
    • Gyroscopes
  • Raman Spectroscopy, Interferometry, Lidar and Metrology

With a narrow linewidth on the order of 1 MHz, and powers up to 300 mW, Photodigm DBR lasers are uniquely suited to numerous precision projects.

For more information about Photodigm laser diodes, please contact us.


March 2015 Newsletter Out Now

March 2015 NewsletterThe Elliot Scientific March newsletter is now available. In this issue we hear about the new colorPol® polariser brochures from CODIXX, see how spectroscopy and Atom Optics’ science benefit from Photodigm Laser Diodes, feel the emphasis Micro Laser Systems put on diffraction limited circular beams, get a taste of a superior solution from CRAIC Technologies for analytical challenges, and almost smell the sea air as we visit the SU2P Symposium in Dundee next week, plus the International Year of Light and more…

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Micro Laser Systems adds new fibre products to its range

Micro Laser Systems manufacture diode laser modules and optical assemblies with an emphasis on providing diffraction limited, circular beams with low wavefront error and low divergence. The California-based company has recently developed a new range of products which we are pleased to introduce to the UK and Ireland.

Fibre Focuser

Fiber Focuser-14_43The Micro Laser Systems’ Fibre Focuser generates diffraction limited micron spot sizes at long working distance via its multi-element air spaced Focusing Cell. This element screws onto the main collimator to provide a convenient and compact way to define the focused spot. This method avoids additional optic holders and alignment problems. The Fibre Focuser can be adjusted to work optimally with singlemode fibres, polarisation maintaining (PM) fibres and large mode area (LMA) fibres at any one wavelength within the limits of its AR coating.

The Fibre Focuser’s optical materials have been chosen to eliminate or minimise laser-induced fluorescence, especially in the visible, and are housed in a stainless steel body to shield from the effects of temperature. Custom options, such as alternative housing materials for hazardous environments, mounting holes or slots, and special wavelength ranges, can be ordered.

Fibre Receiver

FiberReceiver_43The FR10 Fibre Receiver has been designed to collect reasonably collimated light and inject it into a 100 µm or larger core fibre with greater than 90% efficiency. The FR10 has been specially engineered specifically by Micro Laser Systems for this task, delivering a much larger signal than if using a reversed collimator in the same situation.

Housed in stainless steel and fitted with an SMA connector, the FR10 Fibre Receiver is delivered with a factory preset focus for collimated light. However, if you are working at the lower or upper end of the spectrum, or if the light source is not as collimated as one would like, focus can be user adjusted for better coupling and optimal signal strength.

The receiver’s 10 mm aperture is threaded to accept sensors or ½” inch optics such as filters. Extra items can be added via the convenience of the FL10 Cell mount, and a ring adapter for mounting to common optical mounts and optical fibre assemblies is also available.

For more about these two products, visit our Micro Laser Systems pages on our website, or contact us directly for more information.

 

 


Integrated Optics add two new laser wavelengths: 445 and 488 nm

Integrated Optics UAB has expanded their range of MatchBox™ series CW Micro Lasers by introducing 445 nm and 488 nm models for applications in chemistry and biophotonics. The MatchBox™ series includes both DPSS and direct diode lasers with a wide range of output wavelengths – from 405 nm to 1342 nm – with either free space or fibre coupled outputs.

With a small, robust and easy to integrate form factor, which is enabled by the monolithic design and semi-automated precision assembly process, the MatchBox™ series has the best power, size, and price ratio in the market, making them ideal as a research-grade laser.

Features

  • Dozens of wavelengthson palm_500px
  • Optional SLM models
  • Ultra-low optical noise
  • Sealed laser head
  • Very compact size
  • Optional fibre coupling

For availability and technical specifications of these lasers, please contact us.


July 2014 Newsletter Out Now

July 2014 NewsletterThe Elliot Scientific July newsletter is now available. In this issue we announce the arrival of two new lasers from Integrated Optics, reveal Energetiq’s new X-series of LDLS illumination systems, cover safety eyewear from NoIR Lasershields, look at Elliot Martock precision slides and stages, and capture the mood of the SPIE International Year of Light 2015 photography competition.

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January 2014 Newsletter Out Now

January 2014 NewsletterThe new 2014-style Elliot Scientific January newsletter is now available. In this issue we welcome Integrated Optics and their ultra-compact high-performance MatchBox series of lasers, cover the Mercury package that enables higher powers from some Photodigm laser diodes, see how FEMTOOPTICS help the ultrafast laser community, bring you Elliot Scientific’s own special catalogue for EXFO R&D telecom test products, and look forward to Photonics West next month..

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December 2013 Newsletter Out Now

December 2013 E-LetterThe Elliot Scientific December newsletter is now available. In this issue we cover Micro Laser Systems’ new green diode laser for microscopy, look at polarising optics and waveplates from OptiSource, discover rugged diode-pumped fibre amplifiers and lasers from IPG Photonics, and learn how physics and the biological sciences can benefit from sensitive magnetometry systems by Tristan Technologies.

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New Green Diode Laser for the more demanding application

“Micro Laser Systems has designed this laser to ensure source imperfection is a thing of the past”

Micro Laser Systems (µLS) has introduced a high stability green diode laser with diffraction limited performance for more demanding applications. These include: confocal microscopy, flow cytometry, fluorescence excitation, particle analysis, direct laser writing and metrology.

This new laser in the Lepton IV OEM series delivers a circular Gaussian beam with high output stability, has a low power requirement, and is built into a smaller package size when compared to typical Argon and diode pumped lasers. Output power is up to 40 mW and can be continuous wave, pulsed, or modulated, while the low wavefront error allows for the generation of micron and  sub-micron spots sizes, or the production of a large clean beam for illumination.

The OEM units are available with or without temperature control – depending on your application – and are provided with numerous threaded mounting holes for secure installation.

For more information on this model, other wavelengths available in this series, or the extensive µLS range of collimators, free-space, and fibre-coupled lasers, then do contact us now.


October 2013 Newsletter Out Now

October 2013 E-LetterThe Elliot Scientific October newsletter is now available. In this issue we explore the range of nanopositioning products available from Mad City Labs, take a look at the new catalogues about Probe Stations from Lake Shore and laser eyewear from Honeywell Safety, feature Laser Driver Modules from OptoSci, wave the flag for the UK at InterOpto in Japan, and take a stand at Photonex in Coventry next week.

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June 2013 Newsletter Out Now

June 2013 E-LetterThe Elliot Scientific June newsletter is now available. In this special Laser Diode issue we welcome Vescent Photonics and their laser products for cold atom science, cover the laser diode ranges from Photodigm, Eblana Photonics and the AKELA Laser Corporation, and look forward to CLEO in San Jose next week.

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Micro Laser Systems offer Stabilised Free Space Lasers and Fibre Collimators

Micro Laser Systems offer their OEM range of high performance Lepton IV free space lasers in both standard and wavelength stabilised versions. The modules are ideal for existing and new applications in a variety of fields such as microscopy, spectroscopy, material characterisation and analysis, scanners and sensors, correlators, interferometers, microlithography, reprographics, flow cytometry, ophthalmology, dermatology, atomic clocks, laser pumps, and telecoms.

Over 30 different laser wavelengths are available with diffraction-limited circular Gaussian beams ranging from 1 mm to 6 mm in diameter, and single transverse and longitudinal modes. Wavelengths range from 375 to 1600 nm, and powers up to 150 mW are available.

Fibre collimators  are of increasing importance to the company’s product line-up.  The FC Series of collimators are designed specifically for singlemode fibre, polarisation maintaining fibre and fibre laser applications that can generate a pure Gaussian beam. Aperture sizes from 5 to 45 mm are available with a very clean output and no diffraction patterns or beam distortions. The output stays Gaussian no matter the distance and the adjustable output is ideal for tuning the desired wavelength to the best collimation.

Three wavelength regions cover from 375 to 2000 nm for use with Ar, YAG, Ti-Sapphire, HeNe, DPSS, and any commercially available fibre coupled diode laser.

 Please contact us for more details.


New Products from EXFO – Tunable Laser Source & Matrix Optical Switch

EXFO has recently launched two new products that Elliot Scientific is able to offer to the UK and Irish telecom sectors.

IQS-2800 ITLA Tunable Laser Source – Up to 36 continuous wave high power lasers in one box

The recent upsurge in bandwidth requirements by carriers is pushing next-generation transmission systems to achieve new capacity limits via use of complex high-order modulation formats like dual-polarisation quadrature phase-shift keying (DPQPSK).

The new EXFO IQS-2800 is a modular test solution, housed in the IQS-636 platform, that provides researchers and engineers with a comprehensive way to design and test these future ultra-high-capacity network architectures. The lasers are continuous wave (CW), tunable, with a high-power output, narrow 100 kHz linewidth, and 10 pm resolution tunability over the C, L or A band.

MXS-9100 MEMS MxN Matrix Optical Switch – Any number of M input fibres can connect to any number of N output fibres

The new MXS-9100 optical switch is the perfect solution for centralised instrument sharing or automated testing in manufacturing. With its all-optical cross-connect technology, the MXS-9100 provides a unique combination of low insertion loss, fast protected switching and high reliability required in the lab or manufacturing environment. It allows any of M input fibres to connect to any of N output fibres in a fully non-blocking manner.

For more information on these or the other telecom products we offer, please visit our EXFO pages or contact us.


April 2013 Newsletter Out Now

April 2013 E-LetterThe Elliot Scientific April newsletter is now available. In this issue we welcome Photodigm’s High Power Single Frequency Monolithic Distributed Bragg Reflector (DBR) Laser Diodes to our portfolio, introduce Lake Shore’s new 4 Additional Input option card for Model 336 and 350 Low Temperature Controllers, cover new systems in the mechOnics micropositioning range, look forward to the 40th Laser World of Photonics in Munich, and more.

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Photodigm High Power Single Spatial & Longitudinal Mode Laser Diodes now available in UK

Photodigm is a leading specialist manufacturer of high power single spatial and longitudinal mode laser diodes that deliver unsurpassed performance for applications where beam quality and spectral purity are critical. Elliot Scientific is now offering the Photodigm range to its customers who have requirements for such precision laser diodes in the following fields:

  • Atom Optics
  • Spectroscopy
  • Non-linear Optics
  • Quantum Computing
  • Precision Instrumentation
  • Fibre Amplifiers
  • High-Speed Pulsed Operations

Photodigm manufacture in their own fab so, by controlling all aspects of design and production, their proprietary DBR lasers deliver the highest standards in beam quality and the highest powers available today in individual single mode laser diodes. 

Photodigm DBR lasers are designed to deliver single frequency, single mode laser output. They offer a range of wavelengths and packing options to suit. Full details on our website.

The precisely fabricated ridge waveguide selects a single spatial mode, and the monolithic DBR grating selects a single longitudinal mode. With a narrow bandwidth on the order of 1 MHz, and powers up to 400 mW, Photodigm DBR lasers are uniquely suited to many precision applications and are available in a variety of packages.

Please contact us for more information.