The new gain adjustable avalanche photodetector
Practitioners in laser waveform acquisition, fiber optic sensing, and precision optical detection often encounter two major challenges: detection gain drift caused by environmental temperature fluctuations, and inability to flexibly adapt sensitivity when switching between strong and weak light signals, ultimately resulting in distorted test data and repeated experimental rework. In response to the common pain points in the above industries, Rofea Optoelectronics has launched the R-APR-50M and R-GAPR-400M temperature compensated gain adjustable avalanche photodetector, which break through the limitations of traditional APD photodetector with dual core technology and create an integrated light detection solution with wide temperature, high speed, and adaptability.
The gain adjustable avalanche photodetector is equipped with a high-precision temperature compensation circuit, which controls the avalanche multiplication M-factor fluctuation within ± 3% in the range of 18-28 ℃. Even if there are temperature differences in the laboratory or industrial site, it can maintain stable response output and completely avoid data errors caused by temperature drift. The side of the body is equipped with a continuously adjustable gain knob, and the M-factor can be accurately adjusted in sections, taking into account both low light ultra high sensitivity detection and strong light anti saturation acquisition, greatly expanding the dynamic detection range. The entire system covers the three mainstream spectral bands of 200-1000nm, 400-1000nm, and 900-1700nm, with a 3dB bandwidth of up to 400MHz. It can fully capture high-speed optical signals such as nanosecond pulse laser, RF modulation, and optical heterodyne beat frequencies. The low-noise circuit design reduces the equivalent noise power to 0.21PW/√ Hz, and with a 1mm large light sensing surface, even weak light signals can be clearly restored.
The whole machine integrates high-voltage bias and amplification circuits, with DC ± 12V standard power supply, BNC DC output compatible with mainstream equipment such as oscilloscopes and acquisition cards, and an ultra wide working temperature range of -40~+70 ℃. It is suitable for multiple scenarios such as fiber optic communication, industrial non-destructive testing, and scientific research optical experiments, and supports customized band and interface solutions to meet the needs of different optoelectronic system construction in one stop.
Post time: Aug-13-2026