Laser Ultrasonic Receiver

Laser Ultrasonic Receiver (AIR-1550-TWM)

AIR-1550-TWM Receiver and Measurement Head

AIR-1550-TWM Receiver and Measurement Head

The AIR-1550-TWM Laser Ultrasonic Receiver represents the state-of-the-art in non-contact laser ultrasonic testing. The AIR-1550-TWM is the first laser ultrasonic receiver operating at the telecom and eye-safe wavelength of 1550 nm. Eye-safe lasers are important for the protection of researchers as well as for workers in production environments.

The operating wavelength also enables the AIR-1550-TWM to work effectively with simple, low-cost laser sources such as DFB or fiber lasers, reducing system cost and eliminating laser maintenance concerns.

The AIR-1550-TWM includes a compact fiber-coupled measurement head. This sensor head enables remote measurement, and is ideal for use with complex configurations or where measurement access is limited.

The non-contact measurement capability of laser ultrasonics and its immunity to test-piece temperature and motion make it ideal for factory use. The AIR-1550-TWM is available configured for factory applications with an optional ruggedized measurement head and fiber optic cables.

When incorporated into a full laser ultrasonic measurement system, the AIR-1550-TWM can measure thickness, density, and temperature with laser precision. In addition, laser ultrasonics can locate subsurface defects such as inner wall corrosion or delaminations. These inspection systems give real time feedback for process control or in-service system inspection.


Model AIR-1550-TWM
Surface Displacement Sensitivity4 x 10-7 nm rms (W/Hz)1/2
Detector Bandwidth125 MHz
Measurement TypeHigh Sensitivity, Fast Response Laboratory and Factory
External Probe Laser Requirement60 mW DFB Laser Diode
Fiber Lasers up to 2W
FHY Fiber Measurement HeadAperture: 25 mm
Focal Distance: 50-100 mm
Spot Size: 100-200 μm
Optional Guide Laser BeamDiode Laser at 650 nm
Analog Output50 Ohm source
Electrical Requirements100/220 V, 50/60 Hz
Alignment SignalProvided by internal piezo mirror
Dimensions325 x 250 x 100 (L x W x H, mm)
Compatible with 19-inch rack mount cabinets
Installation and TrainingFor installation and training, please contact us.

Broad Uses of Laser Ultrasonics

Laser ultrasonics is ideally suited for many applications that are beyond the capabilities of conventional ultrasonic testing. The applications extend over three broad areas:

  • Process monitoring: measurements early in an industrial process on parts that are hot and/or moving at high speed
  • Post-process evaluation: high resolution inspection of small parts; fast areal scans of large components or structures
  • In-service inspection: inspection of complex structures (turbine blades); inspection under hazardous conditions (nuclear power plants); fast scanning of safety-critical oil and gas pipelines

Features of Laser Ultrasonics

Laser ultrasonic testing has many advantages over traditional contact inspection:

  • Remote, non-contact, reconfigurable
  • Can scan measurement head or sample
  • Proven at speeds ≥ 5 m/s
  • Proven at temperatures ≥ 2000°F
  • High bandwidth operation
  • High spatial resolution
  • Micrometer thickness accuracy
  • Small contact area on sample.

Typical Applications:

Thickness measurements

  • Glass containers
  • Ceramic and metallic coatings
  • Steel tubes and cast iron pipes

Defect Detection

  • Laser welds
  • Ceramic coatings
  • Electronic packages
  • Bonded components
  • Small parts

Crack sizing

  • Oil and gas pipelines
AIR-1550 Receiver as part of a system performing tests on a steel tube.

AIR-1550 Receiver as part of a system performing tests on a steel tube.