PDM Series

Application & Methods PDM Series Single Photon Avalanche Diode DESCRIPTION SPECIFICATIONS TECHNICAL DOWNLOADS KEY BENEFITS Precision Timing for Demanding Photon Counting Ultrafast Single-Photon Detection PDM Series delivers high-performance, solid-state SPAD detector modules designed and manufactured by Micro Photon Devices (MPD) for seamless use in time-resolved photon counting. Built around epitaxial silicon Single Photon Avalanche Diodes with patented integrated Active Quenching Circuits (iAQC), they provide excellent photon detection efficiency and timing resolutions down to < 50 ps (FWHM). With multiple active area options, robust daylight tolerance, flexible fiber or free-beam coupling, and stable timing at high count rates, PDM Series is ideally suited for a wide range of time-resolved single-photon techniques, including LiDAR, antibunching and TRPL. Measured IRFs Across the Visible and NIR The instrument response functions of PDM Series highlight their fast and stable timing behavior across the visible and near infrared spectrum. When combined with suitable picosecond excitation sources and time tagging & TCSPC electronics, the modules deliver clean, well-defined IRFs with characteristic SPAD performance at different wavelengths. These measurements demonstrate the reliable temporal response and high sensitivity that make PDM Series well suited for time-resolved photon counting applications with a strong focus on quantum optical setups. Key Timing and Detection Performance Timing resolution down to <50 ps (FWHM) with stable IRF performance across count rates High photon detection efficiency with up to 49% quantum effiency at 550 nm Silicon SPAD architecture with patented iAQC for fast, clean avalanche quenching Multiple active area options (20, 50 and 100 µm) for optimized light collection Robust daylight-tolerant operation and low afterpulsing probability (<3%) Two-output design (TTL + NIM) for seamless integration with Time Tagging and TCSPC electronics Specifications at 400 nm 24 %** at 550 nm 49 %** at 650 nm 37 %** SPAD diameter 20 µm (on request) 50 µm 100 µm Available selections < 25 cps < 5 cps < 250 cps < 100 cps < 50 cps < 25 cps < 500 cps < 250 cps < 100 cps < 50 cps < 25 cps Counting output, TTL signal (FWHM) 250 ps Timing output, NIM signal (FWHM) Down to 50 ps, increases in blue/UV spectral range Maximum 3 % Dead time 77 ns (typical) Output signal TTL for counting output, NIM for timing output Output pulse rise and fall times < 2 ns on 10 pF load Output pulse duration 20 ns (typical) Gating input TTL control (low level gates detector off) Supply input connector Standard 3.5 mm supply socket Supply voltage Unregulated DC, any value 5 V – 12 V * Typical, without FC connector ** Losses due to fiber connector: < 20 % absolute All Information given here is reliable to our best knowledge. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications and external appearances are subject to change without notice. Technical Downloads Datasheet PDM Series Contains specifications, features and applications of SPAD photon counting detectors offering high PDE and timing resolution down to 50 ps.