ILX OMH-6727B Optical Power and Wavelength Measurement Head, 1 W, 950 to 1650nm

The ILX OMH-6727B is an InGaAs optical power and wavelength measurement head engineered for precision near-infrared testing from 950 nm to 1650 nm. Built around integrating sphere technology, it delivers simultaneous power and wavelength measurements without mechanical adjustment, eliminating alignment sensitivity and beam-profile dependencies. Operating with power ranges from 100 nW to 1 W (−40 dBm to +30 dBm), the OMH-6727B achieves ±5.0% power accuracy and wavelength accuracy of ±1.0 nm across 1000–1650 nm and ±1.5 nm from 950–1000 nm.

The 6 mm entrance aperture supports free-space launch and fiber-coupled configurations via optional FC, SC, LC, ST, and DIN adapters, or bare fiber. Wavelength measurement requires minimum optical power of 150 µW (−8.2 dBm) at 950–1200 nm and 10 µW (−20 dBm) at 1200–1630 nm. With typical noise of 5 nW p-p and a temperature coefficient of −0.1%/°C, the head maintains stable measurements across its +10°C to +40°C operating range.

All calibration is NIST traceable. The OMH-6727B integrates with the ILX Lightwave OMM-6810B Optical Multimeter and requires at least one hour warm-up for rated stability.

Technical Specifications

• Spectral Range: 950 nm to 1650 nm


• Power Measurement Range: −40 dBm to +30 dBm (100 nW to 1 W)


• Maximum Power Handling: +37 dBm


• Power Accuracy: ±5.0%


• Wavelength Accuracy: ±1.0 nm (1000–1650 nm); ±1.5 nm (950–1000 nm)


• Minimum Power for Wavelength Measurement: 150 µW / −8.2 dBm (950–1200 nm); 10 µW / −20 dBm (1200–1630 nm)


• Noise: 5 nW p-p (typical)


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


• Detector Material: InGaAs


• Entrance Aperture: 6 mm


• Operating Temperature: +10°C to +40°C


• Storage Temperature: −20°C to +60°C


• Humidity: <85% RH, non-condensing


• Warm-up Time: ≥1 hour


• Dimensions: 69 mm diameter × 28 mm thickness


• Weight: 0.38 kg

Key Features

• Integrating sphere design eliminates detector saturation, alignment, beam-profile, polarization, and back-reflection errors


• Simultaneous power and wavelength acquisition without repositioning


• NIST-traceable calibration


• Supports free-space and fiber-coupled optical launch


• Compatible with FC, SC, LC, ST, DIN connectors and bare fiber adapters

Typical Applications

• Telecommunications laser and component characterization


• Research and development optical system validation


• Near-infrared source power and spectral analysis

Compatibility & Integration Designed for operation with the ILX Lightwave OMM-6810B Optical Multimeter. Optional fiber-coupling adapters enable measurement flexibility across diverse launch geometries.