| 1. |
- Holm, Ulf, et al.
(författare)
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Transmission loss compensation for Faraday effect fibre optic sensors
- 1994
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Ingår i: SENSORS AND ACTUATORS A-PHYSICAL. - : Elsevier. ; , s. 487-490
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Konferensbidrag (refereegranskat)abstract
- We present a novel scheme for compensation of transmission loss variations in Faraday effect-based fibre optic magnetic field sensors. Light is sent through the sensing element in opposite directions to form the two signal channels needed for the compensation. Experiments have been made with a time-multiplexed multimode system in which IR emitting diodes are alternately used as emitters and detectors. With transmission loss variations of less than 25%, which is reasonable in a real system, the resulting error is well below 1%.
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| 2. |
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| 3. |
- Sohlström, Hans, 1952-, et al.
(författare)
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A waveguide-based fiber optic magnetic field sensor with directional sensitivity
- 1991
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Ingår i: SPIE - The International Society for Optical Engineering, vol. 1511. - Bellingham, WA, United States : Int Soc for Optical Engineering. - 0819406201 ; , s. 142-148
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Konferensbidrag (refereegranskat)abstract
- Design and performance of an extrinsic guided wave fiber optic magnetic field sensor is reported. The sensor utilizes a substituted YIG (yttrium iron garnet, Y3Fe5O12) thin film as the waveguiding sensing element. A polarization maintaining fiber downlead was used to provide insensitivity to both power and loss fluctuations. The design makes it possible to determine both the magnitude and the sign of the magnetic field. Measurement results indicate a usable measurement range of at least several mT with a noise equivalent magnetic field level of less than 8 nT/√Hz
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| 4. |
- Sohlström, Hans, 1952-, et al.
(författare)
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The Performance Of A Fiber Optic Magnetic-Field Sensor Utilizing A Magnetooptical Garnet
- 1992
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Ingår i: Fiber and integrated optics (Print). - : Taylor & Francis. - 0146-8030 .- 1096-4681. ; 11:2, s. 135-139
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Tidskriftsartikel (refereegranskat)abstract
- The design and performance of a multimode fiber optic magnetic field sensor utilizing the Faraday effect in an epitaxially grown thick (YbThBi)IG film is reported. The sensor is found to be linear over a range of more than lOO dB.
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