Keysight / Agilent / HP 83403C Lightwave Source Module

The Keysight 83403C is a tunable DFB lightwave source module engineered for optical component characterization and photonic signal generation. Operating at 1550 nm with exceptional wavelength stability of 0.3% per year, this module delivers 2–3 mW of optical output power with spectral width below 50 MHz, making it ideal for precision testing of optical amplifiers, filters, and transceivers. The integrated RF modulation capability supports signals from 300 kHz to 6 GHz with up to +14 dBm RF drive, enabling dynamic device characterization. Single-mode fiber compatible (9/125 µm) with PC optical connector interface, the 83403C integrates directly into the Keysight 8702 Series Lightwave Component Analyzers as a primary accessory module.

– Technical Specifications

• Laser Type: DFB (Distributed Feedback)
• Center Wavelength: 1550 nm ± 30 nm
• Wavelength Stability: 0.3% per year
• Spectral Width: < 50 MHz
• Optical Output Power: 2–3 mW average (maximum 3.0 mW unmodulated)
• Modulation Range: 300 kHz to 6 GHz
• RF Input Power: Up to +14 dBm
• Fiber Compatibility: 9/125 µm single-mode
• Optical Connector: PC (Physical Contact)
• Laser Classification: FDA Class I / IEC Class 1
• Maximum Output Power (Safety): ≤ 5 mW at 1550 nm
• Shipped Weight: 5 lbs

– Key Features

• Ultra-stable wavelength output for repeatable measurements
• Narrow spectral width ensures minimal phase noise in modulated signals
• Direct RF modulation up to 6 GHz for broadband device testing
• Low output power suitable for safe operation in laboratory environments
• Single-mode fiber interface matches standard telecommunications wavelength band

– Typical Applications

• Optical amplifier gain and noise figure characterization
• Wavelength-dependent filter response measurement
• Transceiver performance validation across modulation frequencies
• Optical component spectral analysis

– Compatibility & Integration

Designed as an accessory module for the Keysight 8702 Series Lightwave Component Analyzers. Optical connector interfaces are sold separately.