LED Streetlighting: Holy Grail or Unfit for Purpose?

A short informative article entitled “LED Streetlighting: Holy Grail or Unfit for Purpose?” by Fred Bass appears on The Light Review website. Focusing on the topics of color range and lighting control, this article reviews some successes, benefits and shortcomings of LED streetlights in light of research, public opinion and legislation. To read the complete … Continue reading

Blog, LEDs

40 W Fiber-to-Fiber Broadband Isolators from EOT

Empowered by new materials capability from their FEE division and new optics fabrication, polishing, and coating capabilities, EOT’s Custom Solutions Group is excited to offer our customers this family of high power (40 W) Fiber-to-Fiber Isolators to enable select new laser development efforts. Features include: Broadband Isolation Window for rejected beam Same Face Fiber Input/Output … Continue reading

Blog, Electro-Optics Technology (EOT), Optics

New 9 mm TOSA SLDs at 840 nm from SUPERLUM

At the upcoming Laser World of Photonics in Munich, Germany, SUPERLUM Diodes will introduce a new product: miniature uncooled fiber-pigtailed TOSA superluminescent diodes (SLDs), based on standard TO9 cans. SLDs provide output power up to 2.5 mW ex SM fiber and 20-22 nm-wide bell-like spectrum at up to +60 °C case temperature. Various custom options, … Continue reading

Blog, Fiber Optics, SUPERLUM Diodes

EOT Provides >100 W Fiber Beam Delivery Optics and Collimators

Applications such as Materials Processing and Directed Energy often involve directing light from pump diodes to laser oscillators and from lasers to work pieces or targets. Delivery via fiber has proven to be an effective and flexible method to accomplish such tasks. Such applications often require excellent resistance to back reflections, very high levels of beam quality … Continue reading

Blog, Electro-Optics Technology (EOT), Fiber Optics, Optics

Measuring Cryogenic Turbopump Speed

Background An axial-flow pump, or AFP, is a common type of pump that essen­tially consists of a propeller (an axial impeller) in a pipe. Cryogenic turbopumps (CTP) are the heart of a rocket engine. With today’s generation of reusable heavy launch space vehicles, CTPs supply pressurized subcooled fuel and oxidizer fluids which are mixed and … Continue reading

Blog, Detectors, Fiber Optics, PHILTEC

Measuring Embedded Objects

Philtec specializes in the design of fiber optic sensor systems for gaining access to hard-to-reach targets. In March 2019, several dozen model D47 sensors were delivered with long fiber optic cables and very small 90° probes as seen here. The fiber optic cable lengths varied from 21 ft (6.4 m) to 55 ft (16.8 m)… Continue reading

Blog, Detectors, Fiber Optics, PHILTEC

Measuring Total Thickness Variation (TTV) with an Interferometer

  Total Thickness variation (TTV), and often wedge, is specified in optical windows and substrates. There are two methods for measuring TTV: Front-to-Back (left image above) and Direct (right image above). Both methods utilize Fizeau interferometers, a product line of Äpre Instruments. Front-to-Back Measurement TTV can only be calculated if the front and back measurements … Continue reading

Apre Instruments, Blog, Interferometers, Systems

Using Ultrafast Laser in FT-CARS

A published paper by Hashimoto et al. (2018), entitled “Ultra-Broadband Rapid-Scan Fourier-Transform CARS Spectroscopy with Sub-10-fs Optical Pulses”, leverages the benefits of products from Novanta. The experimental set-up contains a venteon ultra oscillator from Laser Quantum. The paper demonstrates ultra-broadband Fourier-Transform Coherent Anti-Stokes Raman Scattering (FT-CARS) spectroscopy. The technique spanned over 3000 cm-1, particularly useful … Continue reading

Blog, Laser Quantum, Lasers