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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, 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

New, High Performance, Free Space, 3 kW Faraday Isolators

Applications such as Directed Energy and Materials Processing in the >1 kW regime are now exceeding the limits of current Faraday isolator technology.  Such applications often utilize coherent beam combining from fiber lasers or high aspect ratio Nd slab lasers. At >1 kW, existing Faraday isolators can exhibit both high levels of depolarization due to … Continue reading

Blog, 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

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

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, Lasers