Temperature Insensitive Optical Fiber Laser Bend Sensor With a Low Detection Limit


A fiber in-line Mach-Zehnder interferometer primarily based on a sandwich structure of single mode fiber-skinny core fiber-single mode fiber is inserted into a fiber ring laser cavity to form a fiber laser bend sensor. Such a sensor is temperature insensitive, incorporates a large output lightweight intensity ~0.61 dBm, a high optical signal-to-noise ratio of ~sixty three dB, a slim spectral width of ~0.01 nm at the lasing wavelength and a sensible bending sensitivity of ~one.04 nm/m-one, which offers a low detection limit of ~four.thirty seven × 10-a pair of m-one.

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