The HP/Agilent 8157A is a programmable single-mode optical attenuator engineered for precise control of optical power levels across telecommunications and research applications. Operating from 1200 nm to 1650 nm, this instrument delivers 60 dB of attenuation with exceptional repeatability and stability. The attenuator’s low insertion loss, high return loss, and minimal polarization sensitivity make it ideal for demanding fiber optic system testing where accurate optical power management is critical.
## Technical Specifications
• **Wavelength Range:** 1200 nm to 1650 nm
• **Attenuation Range:** 60 dB
• **Display Resolution:** 0.01 dB
• **Attenuation Accuracy:** Typically better than ±0.02 dB
• **Linearity (typical):** ±0.05 dB
• **Polarization Sensitivity:** Less than 0.02 dB p-p
• **Insertion Loss (typical):** 1 dB or 2 dB
• **Return Loss:** 45 dB
• **Control Interface:** HP-IB (GPIB)
• **Dimensions:** 89 mm H × 212 mm W × 345 mm D
• **Net Weight:** 5.3 kg
## Key Features
• Programmable attenuation control via GPIB interface
• Single-mode fiber compatibility
• Superior accuracy and linearity for repeatable measurements
• Low polarization sensitivity ensures stable performance across signal states
• High return loss minimizes reflections in optical paths
## Typical Applications
• Telecommunications system characterization and testing
• Optical signal conditioning in research environments
• Fiber optic subsystem development and validation
• Power level calibration and verification in lightwave systems
## Compatibility & Integration
Integrates with Agilent’s Lightwave Solution Platform modules including the 8163A/B, 8164A/B, and 8166A/B. Requires Agilent optical interface connectors (81000xI Series), available separately.
