C3092SH-DTC

DATASHEET SENSOR SOLUTIONS Silicon Avalanche Photodiodes C30902 Series High Speed APDs for Analytical and Biomedical Lowest Light Detection Applications Overview PerkinElmer’s C30902EH avalanche photodiode is fabricated with a doublediffused “reach-through” structure. This structure provides high responsivity between 400 and 1000 nm as well as extremely fast rise and fall times at all wavelengths. The responsivity of the device is independent of modulation frequency up to about 800 MHz. The detector chip is hermetically-sealed behind a flat glass window in a modified TO-18 package. The useful diameter of the photosensitive surface is 0.5 mm. PerkinElmer’s C30921EH is packaged in a lightpipe TO-18 which allows efficient coupling of light to the detector from either a focused spot or an optical fiber up to 0.25 mm in diameter. The hermetically-sealed TO-18 package allows fibers to be epoxied to the end of the lightpipe to minimize signal losses without fear of endangering detector stability. The C30902SH and C30921SH are selected C30902EH and C30921EH photodiodes having extremely low noise and bulk dark-current. They are intended for ultra-low light level applications (optical power less than 1 pW) and can be used in either their normal linear mode (VR VBR) where a single photoelectron may trigger an avalanche pulse of about 108 carriers. In this mode, no amplifiers are necessary and single-...