JDS Uniphase VA4503-FPL

The JDS Uniphase VA4503-FPL is a manual variable optical attenuator engineered for precise control of optical signal power in telecommunications, data center, and high-bandwidth testing environments. This handheld instrument delivers attenuation adjustment from 0 to 65 dB with 0.1 dB resolution, enabling accurate signal calibration and system optimization across multiple wavelength bands. Built on JDSU’s ultra-linear attenuator prism and microlens technology, the VA4503-FPL combines laboratory-grade performance with field portability.

## Technical Specifications

• **Attenuation Range:** 0–65 dB (some configurations 60 dB at alternative wavelengths)
• **Attenuation Resolution:** 0.1 dB
• **Maximum Measured Attenuation:** 68 dB
• **Insertion Loss:** < 2.0 dB
• **Polarization Dependent Loss (PDL):** < 0.05 dB
• **Return Loss:** < 60 dB
• **Calibration Wavelengths:** 830/1300 nm and 1300/1550 nm
• **Fiber Type:** 9/125 µm single-mode
• **Power Source:** 9 V lithium battery

## Key Features

• Manual front-panel control with large-scale LCD readout for attenuation level display
• Non-volatile memory maintains set attenuation through power cycles
• Microlens technology ensures highly reliable and repeatable attenuation settings
• Rear panel-mounted connector bulkheads with support for major connector types including FC/PC
• Optional universal connector adapter (UCA) available for multi-platform deployment
• Battery-powered operation enables portable field use without external power infrastructure

## Typical Applications

• Optical signal power management in telecommunications networks
• Calibration and testing in data center fiber optic infrastructure
• Signal level optimization in high-bandwidth communication systems
• Field-deployable attenuation measurement and adjustment

## Compatibility & Integration

The VA4503-FPL integrates with existing fiber optic systems through flexible connector options. Multiple connector type support and optional UCA facilitate seamless integration across diverse optical communication architectures without requiring system reconfiguration.