BPD480 1GHz High-Speed Balanced Photodetector - 1000-1700nm InGaAs

Product Overview

BPD480 is a high-performance 1GHz high-speed balanced photodetector (BPD) specially designed for precision coherent optical detection systems and high-speed near-infrared optical signal measurement. Core built with two precisely matched InGaAs photodiodes and a high-performance low-noise transimpedance amplifier, it achieves an outstanding common mode rejection ratio (CMRR) of >25dB, and realizes effective signal subtraction processing for the two detected optical signals—this unique design can efficiently eliminate common-mode noise in the optical system, accurately capture tiny changes of valid signals from complex interference noise, and greatly improve the signal-to-noise ratio of weak light detection. Covering a 1000-1700nm near-infrared spectral range with a high responsivity of 0.9A/W @1550nm, the BPD480 boasts an ultra-wide 1GHz bandwidth (400k-1GHz) and an ultra-fast 400ps rise time, ensuring high-speed and high-precision capture of dynamic optical signals. With standard FC fiber flange input for seamless coupling with fiber optical systems, SMA female output with 50Ω impedance matching, and a compact, rugged aluminum housing, it is fully adapted to the complex working environments of laboratory research and industrial applications, and is the core optoelectronic component for OCT, DAS, heterodyne detection, laser radar and optical delay measurement systems.

Key Features

• High-speed 1GHz bandwidth (400k-1GHz) with 400ps ultra-fast rise time for dynamic optical signal capture
• Two precisely matched InGaAs photodiodes, delivering >25dB excellent common mode rejection ratio (CMRR)
• 1000-1700nm near-infrared spectral response with 0.9A/W high responsivity @1550nm
• Signal subtraction design eliminates common-mode noise, capturing tiny valid signal changes from interference
• Low-noise transimpedance amplifier for ultra-weak optical signal detection with high signal-to-noise ratio
• Standard FC fiber flange input for seamless integration with fiber optical coherent detection systems
• SMA female output with 50Ω impedance matching, compatible with standard high-frequency RF systems
• Compact and rugged aluminum housing, space-saving design for limited installation space
• AC coupling output, ±0.7V maximum output amplitude for stable high-speed signal transmission
• Wide operating temperature range (-20~65℃) and low power consumption (<200mA) for industrial/lab use
• Reliable structural design for long-term stable operation in continuous working conditions

Applications

• Optical Coherence Tomography (OCT) medical scanning and imaging systems
• Distributed Acoustic Sensing (DAS) fiber optic vibration and sensing systems
• Heterodyne detection and coherent optical communication systems
• Optical delay measurement and high-precision optical parameter testing
• Laser radar (LiDAR) signal detection and ranging systems
• Precision optical metrology and high-speed coherent optical detection
• Academic and industrial laboratory coherent optical research experiments
• Near-infrared weak light signal detection with high noise interference
• Optical fiber sensing and industrial non-contact detection systems
• High-speed laser system dynamic signal analysis and feedback control

Specifications

Core Model Parameters (BPD480C-1G, tested with 50Ω load unless noted)

Common Parameters