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LASER COMPONENTS Creates Silicon APD Solution for Short-Range Laser Rangefinders

LASER COMPONENTS has created a proven Silicon APD solution for short-range laser rangefinders.

SARF-Series for Low-cost, Short-range Rangefinding Applications

A number of key features have been brought together to offer a real solution to address applications where regular Silicon photodiodes do not quite provide enough gain, and regular Silicon APDs with high-spec’ band-pass filter and all of the associated temperature-gain compensation circuitry is not financially viable.

The SARF-Series has been optimised to have a gradual multiplication curve at low gain, for M=10; the relatively low-gain operation of the APD is where the optimum sign-to-noise ratio is found where high background light is present. This makes it possible to operate without the need to temperature compensate.

An integrated band-pass filter is included in place of the window of the TO-can, on a surface-mound package or directly onto the APD chip itself. The dielectric filter coating is very cost-effective in volume; saving on the cost of mounting and purchasing a separate filter whilst saving space too.

The SARF-Series is based on a “reach-through” structure for excellent quantum efficiency and high-speed, and has been optimised for 905nm range finding with a wide operating temperature range.

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