Fibre-optic Hydrophones

Do you want to measure close to the face of the ultrasound transducer or make CW measurements? Would you like to measure the acoustic pressure and associated thermal effects of a high intensity field? If so the fibre-optic hydrophone is the best instrument available.


Fibre-optic Hydrophones

Our FOH system is being redesigned and will not be available until 2022.
If you are still interested in the FOH system, please let us know and we will send an update in Q1 2022 to confirm availability.
Unfortunately our current version of FOH is now out of stock. 

For more information see the paper “A Fabry–Pérot fiber-optic ultrasonic hydrophone for the simultaneous measurement of temperature and acoustic pressure” in J. Acoust. Soc. Am, Vol. 125, No. 6, page 3611, June 2009.

The fibre optic hydrophone is the latest addition to our hydrophone range. Despite its 10um active diameter the sensitivity is similar to larger element needle hydrophones. This, coupled with, its immunity from electro-magnetic radiation makes it particularly suited for high frequency measurements in hostile fields.

The system can be used in high intensity fields where needle or membrane hydrophones may experience serious damage. Replacement fibres are readily available and inexpensive.

The hydrophone can be used to measure temperature and pressure, at the same time, and at the same point in the field. This enables a direct correlation to be made between pressure and thermal change.

The fibre-optic hydrophone system is supplied with tapered tipped sensors which are optimised for optimal frequency response.

Fibre Optic Hydrophone

Fibre Optic Hydrophone

System supplied with replacement fibres.

Tapered Tip

Tapered Tip

Tapered fibre tip to ensure optimum frequency response over a wide frequency range.

Technical Specifications

Output Impedance: 50 ohm terminated system
Typical Probe Sensitivity: tapered sensor 250mV/MPa averaged in the range 2-20MHz
Sensitivity Tolerance: Sensitivity variation between individual probes is approx.
Usable Frequency range: 250kHz to 50MHz (may require calibration at NPL, London for some frequency ranges)
Dynamic range: 10kPa to 15MPa. Note the system has been tested in a field in excess of 700Wcm-2 with no damage
Typical Frequency Response: to be advised please contact us
Sensor Material: 10 micron parylene on glass backing
Sensor Dimension: 10 micron diameter

*Precision Acoustics reserves the right to change the specification without notice.

Software installation: The latest software is version FOH  If you need a copy of this file please email Paul Morris 

Contact Us

If you would like more information about this product please get in touch by phone, email or enquiry form.

+44 (0) 1305 264669

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