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Optical Fiber Sensing Technologies
book

Optical Fiber Sensing Technologies

by Tiegen Liu, Junfeng Jiang, Kun Liu, Shuang Wang
March 2022
Intermediate to advanced content levelIntermediate to advanced
864 pages
28h 54m
English
Wiley-VCH
Content preview from Optical Fiber Sensing Technologies

10Whisper‐Gallery‐Mode‐Based Hollow Microcavity Optical Fiber Sensing Technology

10.1 Whisper‐Gallery‐Mode Theory

The total internal reflection occurs when light propagates from optically denser medium to optically rarer medium. Based on this phenomenon and appropriate design, light at specific wavelengths can be held in a microcavity, as shown in Figure 10.1a. The supported electrical field distribution solution of light is frequently referred as the whisper‐gallery‐mode (WGM) [1], and it is shown as a series of resonant dips in the transmission spectrum of the detection optical fiber, shown in Figure 10.1b. When the absorption loss of the material is very small, an extremely high Q‐factor can be achieved for WGM microcavity.

The WGM microcavity, ...

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Publisher Resources

ISBN: 9783527346363