The Exfo FVA-3100-BWEI is a variable optical attenuator engineered for precise control of optical power levels across the extended C- and L-band spectrum. This singlemode fiber instrument delivers wavelength-dependent attenuation up to 75 dB across 1200–1400 nm, with carefully managed roll-off at longer wavelengths. It serves critical roles in EDFA characterization, component and system loss simulation, instrument calibration, power meter linearity verification, and spectral tuning applications.
The FVA-3100-BWEI combines low insertion loss (≤1.6 dB at 1550 nm typical), exceptional linearity (±0.1 dB), and fine resolution (0.005 dB) to meet demanding laboratory and field measurement requirements. Three attenuation modes—absolute, relative, and X+B—enable flexible measurement workflows. Remote control via GPIB or RS-232 with full LabVIEW and SCPI support integrates into automated test systems.
## Technical Specifications
• **Wavelength Range:** 1200 to 1650 nm
• **Maximum Attenuation:** ≥75 dB (1200–1400 nm); ≥70 dB (1400–1600 nm); ≥65 dB (1600–1650 nm)
• **Insertion Loss:** Typical 1.5 dB; maximum 1.8 dB; measured ≤1.6 dB @ 1550 nm
• **Resolution:** 0.005 dB
• **Linearity:** ±0.1 dB
• **Repeatability:** ±0.03 dB maximum
• **Spectral Uniformity:** ±0.1 dB
• **Return Loss:** Typical 50 dB (limited by connector return loss)
• **Fiber Type:** 9/125 µm singlemode, optimized for spectral flatness
## Key Features
• Three attenuation modes: absolute (including insertion loss), relative (referenced to 0.00 dB), and X+B (user-defined reference)
• Excellent spectral flatness across extended wavelength range
• Compact benchtop form factor: 222 mm W × 333 mm D × 117 mm H; 2.6 kg
• Optional 19-inch rack mounting
• Standard EXFO PC/UPC connectors; EUI universal optical connectors available separately
## Interfaces & Control
• GPIB (IEEE-488.1, IEEE-488.2) and RS-232 remote control
• LabVIEW instrument drivers and SCPI command set
## Environmental Specifications
• **Operating Temperature:** 0 °C to 40 °C
• **Storage Temperature:** –40 °C to 70 °C
• **Relative Humidity:** 0–80 % non-condensing
