Laser Components offers pulsable infrared emitters from their EP range, fitted with a tungsten filament providing mid-IR radiation to more than 5 microns. The device comes in a standard TO8 package and has an expected lifetime of three years (suitable for applications such as gas sensing). The manufacturer says the tungsten filament achieves the highest temperature and power of any material and is therefore a cost-effective source of near infra-red radiation.
Glass and quartz glass envelopes are most commonly used in incandescent light bulbs but do not transmit well in the infra-red, sapphire is thus a better choice, according to the company. The EP emitter has a patented design that integrates a sapphire window with a tungsten filament in a sealed metallic package, providing a robust source for spectroscopic instruments.
Tungsten filaments are provided in a variety of sizes to accommodate various frequency and modulation requirements. Operating temperatures up to 1900 K are standard with the EP source, all the devices include a gold plated parabolic reflector and an inert gas backfill.
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