Last edited by Kazicage
Monday, July 27, 2020 | History

1 edition of Fiber optic gradient hydrophone construction and calibration for sea trial found in the catalog.

Fiber optic gradient hydrophone construction and calibration for sea trial

Glenn E. MacDonald

Fiber optic gradient hydrophone construction and calibration for sea trial

by Glenn E. MacDonald

  • 192 Want to read
  • 37 Currently reading

Published .
Written in English

    Subjects:
  • Antisubmarine warfare

  • ID Numbers
    Open LibraryOL25516790M

    Fiber optic hydrophones offer the prospect of overcom-ing some or all of the above limitations. The most practically applicable type of fiber-optic hydrophone is the extrinsic type. This employs a fiber-optic downlead to deliver light to and from an optical sensor, or some transducing mechanism, at the end of the fiber. This “Fiber Optic Basic Training” Guide has been designed to get you started and keep you up to date. It represents the knowledge gained from over 25 years experience in fiber optics – back to when it started – but brought up to date to include the latest innovations.

    The fibre optic hydrophone was first proposed by James Cole (Cole et al) and is significant as one of the earliest ap-plications of optical fibre. The first proof of principle demon-strations were achieved independently by two groups in (Cole et al. , Bucaro et al. ) and, following substan-. The fibre-optic hydrophone system (FOHS) contains a class 1M laser product emitting invisible laser radiation. The optical output power from the connector on the front panel of the system does not exceed 1 mW at an optical wavelength of nm and as such should be “eye safe”.

    defence programs. A thin lightweight Fibre Optic Towed Array (FOTA) system was developed by applying the elec-tro-optic (EO) hydrophone technology successfully developed for previous sea bed array demonstrator systems. In early , a FOTA prototype was built and demonstrated in a meaningful environment showing comparable perfor-.   When an FBG is used as a hydrophone in the transmission mode, laser light is launched into the FBG and its wavelength tuned to the slope of the transmission spectrum curve of the FBG as shown in Fig. 1. Fig. 1 shows the measured reflection spectrum of the FBG, which is used in the experiment in the next section. Denoting the transmittance of the FBG at the .


Share this book
You might also like
Letters to a law student

Letters to a law student

Numerical control in manufacturing

Numerical control in manufacturing

Tobago as a field for cotton cultivation.

Tobago as a field for cotton cultivation.

World religions

World religions

Criminal law and its processes

Criminal law and its processes

Helping to combat chronic wasting disease

Helping to combat chronic wasting disease

Dimetrodon

Dimetrodon

Proceedings [of the] 7th Annual Sir Bernard Crossland Symposium and Postgraduate Research Workshop

Proceedings [of the] 7th Annual Sir Bernard Crossland Symposium and Postgraduate Research Workshop

Little Chicks big day

Little Chicks big day

Laying on of hands asserted: or, A plain discovery of the truth thereof

Laying on of hands asserted: or, A plain discovery of the truth thereof

Life of Liszt

Life of Liszt

Qualification test of welders

Qualification test of welders

Fight the System Poster

Fight the System Poster

Fiber optic gradient hydrophone construction and calibration for sea trial by Glenn E. MacDonald Download PDF EPUB FB2

Fiber optic gradient hydrophone construction and calibration for sea trial. Item Preview remove-circle Fiber optic gradient hydrophone construction and calibration for sea trial. by MacDonald, Glenn E. some content may be lost due to the binding of the book.

Addeddate Call number ocm CameraPages: A Mach-Zehnder interferometric fiber optic gradient hydrophone, for operation at nm wavelength, was designed and constructed for testing in the laboratory.

Two individual fiber optic hydrophone sensing coils with 10 m of fiber each were wound and potted on an epoxy mandrel and their respective sensitivities were obtained. They then were mounted on a rigid bar, Cited by: 2.

Fiber optic gradient hydrophone construction and calibration for sea trial. By Glenn E. MacDonald. Download PDF (7 MB) Abstract. Approved for public release; distribution is unlimitedA Mach-Zehnder interferometric fiber optic gradient hydrophone, for operation at nm wavelength, was designed and constructed for testing in the laboratory.

Author: Glenn E. MacDonald. A laboratory study has been made of the characteristics of an interferometric type optical fiber pressure gradient hydrophone.

The optical system is configured as an all fiber Mach-Zehnder interferometer excited by a single mode gallium arsenide diode laser. A pair of identical fiber coils, one in each arm of the interferometer, forms the sensing portion of the gradient Cited by: 6.

[15] Glenn E. MacDonald, "Fiber optic gradient hydroph one construction and calibration for sea trial." Naval Naval Postgraduate School, Montere y, California, 20 ~ 23 ().

Fiber optic gradient hydrophones Fiber optic gradient hydrophones Yurek, A. M.; Danver, B. A.; Tveten, Alan B. Abstract Two fiber optic pressure gradient hydrophones have been designed, constructed and tested. These devices both exhibit good sensitivity and appropriate directionality.

Their responsivities are linear in the Hz to. in which it is immersed creating a fiber-optic bidirectional hydrophone similar ous fiber-optic pressure gradient/accelerometer configurations The pres-sure-gradient hydrophone has a sensitivity which increases linearly with in- "Fiber Optic Gradient Hydrophone Construction and Calibration for Sea Trial," Master's Thesis, Naval.

A standing wave type acoustic calibrator was constructed and used to determine the sensitivity of each individual coil. The pair then was aligned coaxially and separated by 10 cm to operate as a pressure gradient device. Details of the construction of the system, calibration procedure, and hydrophone sensitivity data are presented.

With this in mind, the four types of FOH that are either the most commonly used or have the potential to find application as practical ultrasound measurement tools are reviewed in detail in Eisenmenger fibre-optic hydrophone, Fabry Perot polymer film fibre-optic hydrophone, Multilayer dielectric fibre-optic hydrophone, Fibre-optic Hydrophones.

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.No. 6, pageJune The fibre optic hydrophone is the latest addition to our hydrophone range.

Fiber Optic Gradient Hydrophone Construction and Calibration for Sea Trial by Glenn E. MacDonald Lieutenant, United States Navy B.S.M.E., University of Mississippi, Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN SYSTEMS TECHNOLOGY (Anti submarine Warfare) FROM THE NAVAL POSTGRADUATE SCHOOL.

Fiber optic gradient hydrophone construction and calibration for sea trial. interferometric fiber optic gradient hydrophone, for operation at. Because of the self-calibration, the Fiber Optic Probe Hydrophone can be used as a measuring standard itself. High spatial resolution: µm.

Bandwidth 0 to 2/20/ MHz, adjustable (up to MHz with deconvolution of hydrophone properties). Risetime 3 ns, electronically limited. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Fiber Optic Equipment Calibration & Maintenance.

Stay compliant with industry standards by taking advantage of our full service calibration lab. All equipment is inspected, calibrated to NIST traceable standards, and verified to be in conformance with the manufacturers specifications.

All calibration services include a calibration certificate. @article{osti_, title = {Fiber optic hydrophone}, author = {Kuzmenko, Paul J and Davis, Donald T}, abstractNote = {A miniature fiber optic hydrophone based on the principles of a Fabry-Perot interferometer.

The hydrophone, in one embodiment, includes a body having a shaped flexible bladder at one end which defines a volume containing air or suitable gas, and. The paper gives out the calibration method of the sensitivity and phase to a vector hydrophone; it analysed the data from the lake trial and the sea trial.

The results indicate that, in the isotropic noise field, the sound pressure and the velocity are not related, but the signals are completely relevant. When there is no coherent interference, both the average sound intensity device and.

The test source should match the type fiber (generally LED for MM or laser for SM) and wavelength (,nm) that will be used on the fiber optic cable you are testing. If you are testing to some standards, you may need to add some mode conditioning, like a mandrel wrap, to meet the standard launch conditions.

The fiber optic probe hydrophone Abstract: We present a new type of hydrophone based on a fiber-optic sensor principle for shock wave and ultrasonic measurements in water. Its detection mechanism is based on the change of the optical reflection coefficient at the end surface of a glass fiber in water by pressure signals.

calculable amount. To check this, we have built a fiber optic probe hydrophone based on one origi-nally proposed by Staudenraus and Eisenmenger [Ultrason ()]. We have adapted the pressure calibration and data analysis of this tool to make it appropriate for precise measurements of tension in liquids.

We have demonstrated the feasibility of employing directly acousto‐optic interactions in an optical fiber to produce a sensitive acoustic detector. Our technique utilizes the phase modulation of an optical beam in a submerged optical fiber coil by sound waves propagating in a fluid.

Analysis of our results indicates that the sensitivity of this technique .work as a pressure-gradient microphone in the acoustic field. Furthermore, the hydrostatic pressure is self-compensated and an ultra-thin dimension is achieved.

Theoretical analysis is given based on the electro-acoustic theory. Field trials are carried out to test the performance of the hydrophone. A sensitivity of nm MPa−1 has been.Two fiber optic pressure gradient hydrophones have been designed, constructed and tested.

These devices both exhibit good sensitivity and appropriate directionality. Their responsivities are linear in the Hz to Hz frequency band.