The Exfo FVA-3150 is a variable optical attenuator that provides precise control of optical power levels across the 1250 nm to 1650 nm band. It delivers attenuation linearity of ±0.1 dB with repeatability of ±0.01 dB (2σ), making it essential for component characterization, system loss simulation, calibration procedures, and power meter linearity verification. The instrument supports both singlemode and multimode fiber configurations with multiple attenuation modes—absolute, reference, and offset (X+B)—enabling flexible measurement and control strategies.
## Technical Specifications
• **Wavelength Range:** 1250 nm to 1650 nm
• **Maximum Attenuation:** Up to 65 dB (model-dependent configurations available at 45 dB or 20 dB)
• **Attenuation Linearity:** ±0.1 dB
• **Attenuation Repeatability (2σ):** ±0.01 dB
• **Insertion Loss (typical):** 0.002 dB (excluding connectors)
• **Return Loss (typical):** 40 dB
• **Maximum Input Power:** 20 dBm
• **Transition Speed (typical):** Up to 23 dB/s
• **Shutter Isolation (typical):** > 90 dB
• **Monitor Output (typical):** 12.8 dB ratio between output and monitor ports (available on select models)
• **Operating Temperature:** 0 °C to 40 °C
• **Storage Temperature:** −40 °C to 70 °C
• **Relative Humidity:** 0 % to 80 % non-condensing
• **Dimensions:** 117 mm × 222 mm × 333 mm
• **Weight:** 2.6 kg
## Key Features
• Supports singlemode (9/125 µm) and multimode (50/125 µm, 62.5/125 µm) fiber
• Configurable with or without monitor port for real-time power verification
• Up to 100 programmable attenuation steps with dwell times up to 1000 hours per step
• Program mode optimized for automated BER testing and linearity measurements
• GPIB (IEEE-488.1, IEEE-488.2) and RS-232 remote control interfaces
• LabVIEW drivers and SCPI command support
• Dual optomechanical design: rotating motor shutter and linear motor filter for reliability
## Compatibility & Integration
Available connector options include UPC and APC configurations: DIN 47256, HMS-10/AG, FC (narrow key), ST, SC, E-2000, and LC. APC connectors are available for singlemode applications only.
