06. Fiber Optic Hydrophone ONDA HFO-690

Fiber Optic Hydrophone ONDA HFO-690 A hydrophone for high pressure applications

The HFO-690 is the latest generation optical fiber hydrophone designed to uniquely support high intensity fields for applications such as HIFU (High Intensity Focus Ultrasound), providing both acoustic pressure and temperature measurements simultaneously.

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The HFO-690 is the latest generation optical fiber hydrophone designed to uniquely support high intensity fields for applications such as HIFU (High Intensity Focus Ultrasound), providing both acoustic pressure and temperature measurements simultaneously. Whereas traditional piezoelectric hydrophones were susceptible to damage, the HFO can withstand acoustic pressures up to 500 MPa. Furthermore, the HFO system was designed to be easy to use. Operation with a visible wavelength makes the alignment process simple and safer to use.

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Features

- Support high acoustic pressures up to 500 MPa

- Bandwidth Limiting filters to reduce /noise Equivalent Pressure

- Easy to use touch screen user interface - Simultaneous temperature measurement

- Simple calibration routine

- Fully integrated system with no separate modules

- Visible light source to simplify alignment

- Simple cleaving procedure to repair probes within minutes

- Immune to electrical interference

- Optically filtered to reject stray environmental light

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Frequency Response	3 kHz to 150 MHz
Nominal Acoustic Sensitivity	6 mV / MPa
Noise Equivalent Pressure	0.25 MPa at 2 MHz BW 0.3 Mpa at 10 MHz BW 0.5 MPa at 100 MHz BW
Laser Source	690 nm
Laser Classification	Class 3B
Spatial Resolution	100 μm
Temperature Sensitivity	10 mV / °C
Operating Water Temperature Range	5 to 95 °C
Length of Optical Fiber	2 m

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