Single Photon Counting

NIR-Optimized Single Photon Counting Module Excelitas Technologies’ SPCM-NIR is a Single Photon Counting Module specifically selected and performance-optimized for the near infra-red wavelength spectrum. The SPCM-NIR uses a specially selected SLiK silicon avalanche photodiode with peak single photon detection efficiency typically better than 73% while maintaining uniformity over a 180µm diameter active area. This module achieves enhanced red and NIR sensitivity while maintaining such other performance parameters of the standard SPCM-AQRH, such as outstanding uniformity, overload protection, temperature stability and linearity. This NIR spectrum enhanced device is designed to support long range LIDAR, quantum communication and microscopy, as well as many other applications. Excelitas’ series of photon counting modules are designed and built to be fully compliant with the European Union Directive 2015/863/EU – Restriction of Hazardous Substances in Electrical and Electronic equipment (RoHS). Applications * LIDAR * Quantum Cryptography * Photon correlation spectroscopy * Astronomical observation * Optical range finding * Adaptive optics * Ultra-sensitive fluorescence * Particle sizing * Microscopy and imaging

Features

* Peak photon detection efficiency (PDE) @ 780nm: 70% typical * Active area: 180 µm * Gated output * Single +5 V supply * RoHS-compliant * Linearity over high count rate

Excelitas SPCM-AQ4C

General Description The SPCM-AQ4C is a four-channel photon counting module capable of detecting single photons of light over the wavelength range from 400 nm to 1060 nm. Each channel is independent from the others. Single Photon Counting Module 4 Channel Array The SPCM-AQ4C uses a unique silicon avalanche photodiode (SLiK) that has a circular active area of 180 µm diameter with a peak photon detection efficiency exceeding 60% at 650 nm. Each photodiode is both thermoelectrically cooled and temperature controlled, ensuring stabilized performance despite changes in the ambient temperature. The SPCM-AQ4C module uses an improved circuit with a peak count rate >4M c/s for short bursts of time on all four channels and a count rate of 1.5 M c/s for continuous operation. There is a "dead time" of 50 nanoseconds (ns) between pulses. The module requires +2 Volts, +5 Volt, and +30 Volt power supplies. The output of each channel – a TTL pulse that is 4.5 Volts high (into a 50 O load) and 25 ns wide – is available at the card edge behind the circuit board. Each TTL pulse corresponds to a detected photon. All input and output signals are available at the card connector. Applications Single molecule detection High throughput single photon experiments LIDAR Photon correlation spectroscopy Astronomical observation Optical range finding Adaptive optics Ultra sensitive fluorescence Particle sizing

Features

Peak photon detection efficiency at 650 nm: 60% typical Afterpulsing probability 0.5% Gated input TTL output FC fiber connector mounted and aligned on each detector Four channels in one package Self-contained APD module with integrated electronics ROHS compliant

Excelitas SPCM-AQRH Series

Excelitas' newly enhanced SPCM-AQRH Single-Photon Counting Module detects single photons over the wavelength range of 400 nm to 1064 nm with performance parameters superior to other solid state or vacuum-tube based photon counters. Single Photon Counting Module The SPCM-AQRH uses a unique silicon avalanche photodiode (SLiK) with a circular active area, achieving peak photon detection efficiency greater than 70% at 650 nm over a 180 µm diameter, with unmatched uniformity over the full active area. A TTL-level pulse is generated for each photon detected and the signal is available at the BNC connector at the rear of the module. The photodiode is both thermoelectrically cooled and temperature controlled, ensuring stabilized performance despite ambient temperature changes. Operating temperature range has been increased and the module will function with case temperatures between 5°C and 70°C. The module comes as standard with a free-space window to the APD, with FC fiber adapter, C-mount or tube cage mount bracket/adapter options. Recent electronic circuit enhancements have reduced the minimum dead time to less than 25 ns, thereby increasing linearity and improving the dynamic range of the module. Timing resolution of the module was also improved significantly. The SPCM-AQRH has internal protection circuitry that protects the avalanche photodiode and the module electronics from damage due to accidental overload from exposure to ambient lighting. Applications - LIDAR - Quantum Cryptography - Photon correlation spectroscopy - Astronomical observation - Optical range finding - Adaptive optics - Ultra-sensitive fluorescence - Particle sizing - Microscopy

Features

- Peak PDE: > 70% @ 650nm - 180µm active area - > 35 Mcps dynamic range - Gated output - Single +5 V supply - RoHS-compliant - Low after pulse probability - High uniformity over large active area - Unmatched linearity - Free space window, FC fiber adaptor, C-mount bracket, Tube cage mount bracket options

Specifications

STANDARD SPCM-AQRH-WX OPTION TABLE (ADD -FC FOR REGULAR FC VERSION)
Model	Output Pulse Options			X - Maximum Dark Count Rates (cps)							Optical Mounting Bracket (Non FC Module only)
SPCM-AQRH-WX (-FC)(-BR_)	Output Pulse Width (ns)	Dead Time (ns)	Output Pulse Height (V)	-W0	-W1	-W2	-W3	-W4	-W5	-W6	-BR1	-BR2
SPCM-AQRH-1X	10	24	2.2	1500	1000	500	250	100	50	25	SM1	C-MOUNT
SPCM-AQRH-2X	18	28	2.2	1500	1000	500	250	100	50	25	SM1	C-MOUNT
SPCM-AQRH-3X	28	35	2.2	1500	1000	500	250	100	50	25	SM1	C-MOUNT
SPCM-AQRH-4X	10	24	4.4	1500	1000	500	250	100	50	25	SM1	C-MOUNT
SPCM-AQRH-5X	18	28	4.4	1500	1000	500	250	100	50	25	SM1	C-MOUNT
SPCM-AQRH-6X	28	42	4.4	1500	1000	500	250	100	50	25	SM1	C-MOUNT