Tunable wavelength filtr in extrinsic fabry-perot of optical fiber

Jiang, Yan; Pang, Shuming

doi:10.1007/bf02678398

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…Literature provides examples of optical fiber sensors (FOS) that utilize an air-gap. These include extrinsic Fabry-Perot interferometer sensors (EFPI) [11][12][13][14][15]. In such sensors the second fiber is a reflecting one.…”

Section: Theoretical Analysismentioning

confidence: 99%

Non-Contact Interaction of Ultrasonic Wave on Laser Beam

2011

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The article presents the results of Matlab simulations and experimental studies of non-contact influence of ultrasonic wave on laser beam. A role of the air-gap and the influence of the air-gap on laser-ultrasonic transmission in optical fiber were examined. Two optical fibers were used with air-gap between them. One fiber was attached to a laser diode and positioned to pass through a hole in a sandwich type transducer and in a velocity transformer. In the velocity transformer (at its end), after leaving small air-gap, to the end of the transformer, the other optical fiber is attached. The second fiber can interact with a given biological structure.

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Section: Theoretical Analysismentioning

confidence: 99%

Non-Contact Interaction of Ultrasonic Wave on Laser Beam

2011

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“…In recent years, fiber optic sensors of different configurations based on Michelson, Mach-Zehnder, Sagnac, Fabry-Perot interferometers (FPIs) and LPGs have been proposed and studied for various applications [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Simple structure, small size, electromagnetic immunity, fast response time, high sensitivity and resolution are very attractive futures of such sensors allowing for numerous practical applications.…”

Section: Introductionmentioning

confidence: 99%

“…Simple structure, small size, electromagnetic immunity, fast response time, high sensitivity and resolution are very attractive futures of such sensors allowing for numerous practical applications. FPIs in optical fibers can be divided into two categories: extrinsic and intrinsic, depending on the localization of reflectors-outside or inside the fiber [4][5][6][7][8][9][10][11][12][13]. Different approaches to obtain fiber extrinsic FPIs are reported in literature.…”

Section: Introductionmentioning

confidence: 99%

“…Different approaches to obtain fiber extrinsic FPIs are reported in literature. For example, the FP cavity can be formed between two cleaved fiber ends which are mounted into a hollow tube [5,6] or between the cleaved fiber end and the surface of the sensing element which could be either a reflective diaphragm [7] or a polymer tip [8]. Although such solutions allow to obtain a high finesse interference signal, their practical applicability is limited by a need for careful alignment, difficulty in bonding and high coupling loss.…”

Section: Introductionmentioning

confidence: 99%

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Bragg grating-based Fabry–Perot interferometer fabricated in a polymer fiber for sensing with improved resolution

Statkiewicz-Barabach

Mergo

Urbańczyk

2016

J. Opt.

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We demonstrate for the first time a Bragg grating-based Fabry–Perot interferometer (FPI) fabricated in the polymer fiber with a core made of PMMA/PS copolymer and pure PMMA cladding. The FPI was formed by two gratings with the same Bragg wavelength, λB = 1312 nm, separated by a small gap. The FP cavity was created directly during the grating inscription process by placing a narrow blocking aperture, in the center of the UV beam. Good long-term stability was achieved by fabricating the gratings of type II with long irradiation time (8 min). By choosing an appropriate width of the blocking aperture, we could control the number and the width of interference fringes visible in the grating’s reflection spectrum. Sharp fringes were obtained, of 3 dB width within the range of 50–100 pm, allowing for a significant increase in measurement resolution compared to direct interrogation of a single grating. The proposed interferometer was tested in measurements of strain and temperature in the range of 0–20 mstrain and 20 °C–70 °C, showing the sensitivity of 1.074 nm mstrain−1 and −25.1 pm °C−1, respectively.

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A Study of Interaction of Ultrasonic and Optical Wave in Optical Fiber Using the Air Gap

Gudra¹,

Muc²

2011

Archives of Acoustics

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There exist some possibilities for simultaneous delivery of laser radiation and ultrasounds of low frequency and high intensity: introducing ultrasound oscillations in the optical fiber by the rigid connection of the fiber to the vibrating element and non-contact influence of the ultrasonic wave on the laser beam. The article presents the results of Matlab simulations and experimental studies of influence of the ultrasonic wave on the laser beam. A role of the air gap, and its influence on laserultrasonic transmission in optical fiber was examined. Advantages and disadvantages of both solutions of interaction of ultrasonic and optical waves in, e.g., surgical applications are discussed.

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Tunable wavelength filtr in extrinsic fabry-perot of optical fiber

Cited by 3 publications

References 5 publications

Non-Contact Interaction of Ultrasonic Wave on Laser Beam

Non-Contact Interaction of Ultrasonic Wave on Laser Beam

Bragg grating-based Fabry–Perot interferometer fabricated in a polymer fiber for sensing with improved resolution

A Study of Interaction of Ultrasonic and Optical Wave in Optical Fiber Using the Air Gap

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