Rofea independently developed photodetector integrated photodiode and low noise amplifier circuit, while providing a variety of products, for scientific research users Provide quality product customization service, technical support and convenient after-sales service. The current product line includes: analog signal photodetector with amplification, gain adjustable photodetector, high speed photodetector, High Speed InGaAs Photodetector, snow market detector (APD), balance detector, Low Noise Photodetector, Low Noise PIN Photoreceiver, etc.