Exfo FVA-3150

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.