Fiber Coupled Bias Photodetector – Mini Package

SKU: FBPI

The FBPI Fiber Coupled Linear Photoreceiver is designed for high-speed, high-sensitivity analog and digital applications with bandwidths exceeding 1 GHz. It features a compact, ruggedized metal package with bias and RF pins for easy system integration and an ESD-protected metal enclosure for reliable handling and assembly. The device is rated for operation in harsh environments from –50 °C to +85 °C and under vibration. Both silicon and GaAs PIN detector versions are available to meet diverse application requirements. Unlike amplified detectors, which can distort signals due to internal amplification circuitry, the FBPI operates with a low-noise DC bias, avoiding such distortion. This makes it ideal for measuring fast optical transients while maintaining a linear response to incident light. The photoreceiver operates in photoconductive mode, using reverse bias from an external DC power supply through the bias pins, where incoming light generates a photocurrent. A parallel resistor may be added at the RF output to convert the photocurrent into a voltage signal, optimizing response. For fast transient measurements, a 50 Ω termination should be used; for laser signals longer than 500 ns, a parallel resistor between 1 kΩ and 10 kΩ is recommended.