The Newport / New Focus 1554-B-50 is a DC-coupled amplified photoreceiver that converts optical signals into electrical signals across the 800–1650 nm band. Built around an InGaAs PIN detector with multimode 50/125 µm fiber input, it delivers 12 GHz electrical bandwidth and 0.75 A/W responsivity for high-speed optical communications, laser characterization, and time-domain component analysis.
Technical Specifications
• Bandwidth: DC to 12 GHz
• Wavelength Range: 800–1650 nm
• Detector: InGaAs PIN, multimode 50/125 µm fiber input (FC/UPC connector)
• Peak Responsivity: 0.75 A/W
• Maximum Conversion Gain: −700 V/W
• Maximum Transimpedance Gain: −1000 V/A
• Noise Equivalent Power: 27 pW/√Hz
• Rise Time: 32 ps
• Saturation Power: 0.7 mW
• Output Impedance: 50 Ω (Wiltron K connector)
• Power Supply: ±15 VDC, 200 mA
– Key Features
• DC/AC coupling switch with front-panel indicator (red for DC, green for AC)
• DC bias monitor output (SMA connector) with 50 kHz bandwidth and 1 V/mA transimpedance gain
• Negative output polarity; signal inversion may be required for positive display
• ESD-sensitive device requiring proper grounding during handling
– Typical Applications
• High-speed optical communications measurement
• Laser characterization and performance analysis
• Time-domain optical component testing
• Wideband photocurrent-to-voltage conversion
– Compatibility & Integration
The −50 designation confirms 50/125 µm multimode fiber compatibility. For optimal performance with multimode fiber, graded-index 50/125 µm fiber is recommended. The device accepts both single-mode and 50/125 µm multimode inputs at the FC/UPC connector. Electrical output couples via Wiltron K connector at 50 Ω impedance.
