LBTEK-Your Trusted Partner For Optoelectronic Experiments!

Product Description

High detection efficiency
300 μm photosensitive area
Low dark count
Low afterpulse
Low timing jitter

LBTEK's Single Photon Detectors are ultra-sensitive photodetectors based on Si-APD. The detection wavelength range covers 400-1100 nm and can operate in both linear mode and Geiger mode. In Geiger mode, the gain exceeds 60 dB. The SPD series features a unique high-performance active quenching circuit, enabling continuous single-photon detection and supporting detection gates of arbitrary width and period. This circuit achieves avalanche quenching with over 20 dB suppression, optimizing the performance of the SPD series. The SPD series detectors operate at a low temperature of -30 °C through internal cooling to achieve the best signal-to-noise ratio. The cooling module is controlled by an efficient TEC with a precision of ±0.2 °C. The effective photosensitive detection area of the detector can reach up to 300 μm. The single-photon counting signal is converted into a digital TTL signal and transmitted via an SMA interface. Its highly integrated modular design facilitates OEM applications and industrial integration.

Attribute

Spectral response range400 nm-1100 nm

Photosensitive area300 μm

Single Photon Detectors

Dark count <500 cps (typical value)
Saturation count rate >10 Mcps
Photosensitive area 300 μm
Free space or fiber input

The LBTEK Single Photon Detector achieves a detection efficiency exceeding 55% at the 700 nm wavelength, with a dark count rate of 200-2000 cps and a dead time of less than 50 ns. It is available in two models: free-space input and fiber input. In special application scenarios, the operating temperature of the module should not exceed 50 °C, as excessively high temperatures may cause the APD's operating temperature to rise, leading to an increase in dark count levels. The APD is a highly sensitive photodetection device, and the input optical signal intensity should be controlled during avalanche operation. Excessive light intensity may damage the APD, potentially reducing its detection sensitivity or, in severe cases, causing diode breakdown.

Quantum Efficiency vs. Wavelength Diagram

Product Model	Spectral response range	Anti-reflective coating	Input method	Unit Price	Lead Time
SPD300B-PC	400 nm-1100 nm	700 nm-1100 nm	FC/PC Fiber Optic Connector	$2493.23	Contact
SPD300A-PC	400 nm-1100 nm	400 nm-700 nm	FC/PC Fiber Optic Connector	$2493.23	Contact
SPD300A-APC	400 nm-1100 nm	400 nm-700 nm	FC/APC Fiber Optic Connector	$2493.23	Contact
SPD300B-APC	400 nm-1100 nm	700 nm-1100 nm	FC/APC Fiber Optic Connector	$2493.23	Contact