ILX Lightwave LPH-6708B – Ingaas Powerhead

The ILX Lightwave LPH-6708B is an InGaAs powerhead for precise optical power measurements across the near-infrared spectrum. Built around an integrating sphere design, it characterizes laser diodes, LEDs, and discrete optical components with high accuracy. The powerhead integrates with ILX Lightwave optical power meters to deliver quantitative power analysis in R&D and production test environments.

Note: This is a legacy product superseded by the OMH-6708B.

Technical Specifications

• Sensor Type: InGaAs (Indium Gallium Arsenide)


• Wavelength Range: 800 nm to 1600 nm


• Measurement Range: −40 dBm to +20 dBm


• Maximum Input Power: +42 dBm (1 W damage threshold)


• Accuracy: ±5.0%


• Entrance Aperture: 6 mm


• Noise Level: 1 nW p-p (typical)


• Temperature Coefficient: 0.1%/°C (typical)


• Optical Connector: SC adapter included

Key Features

• Integrating sphere geometry ensures uniform spatial response across the measurement aperture


• Low noise floor at 1 nW p-p enables detection of weak optical signals


• Wide dynamic range from −40 dBm to +20 dBm accommodates diverse source characterization


• ±5.0% accuracy across the specified wavelength band


• Minimal temperature drift of 0.1%/°C maintains measurement stability in variable lab conditions

Typical Applications

• Characterization of laser diodes and LEDs in development and qualification


• Production testing of optical transmitters and receiver modules


• Power budgeting and loss analysis in fiber-optic system design


• Absolute power measurement across 800 nm to 1600 nm near-infrared spectrum

Compatibility & Integration The LPH-6708B connects to ILX Lightwave optical power meters, including the OMM-6810B model. SC optical adapter is provided; compatibility with FC and ST adapters is supported depending on configuration.