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首页> 美国政府科技报告 >Bragg Grating Reflector Fiber Laser for Vibration Measurement: Theoretical andExperimental Investigation with Emphasis on the Frequency Response (Bragg-Gitter Fiber-Laser for Vibrasjonsmaling)
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Bragg Grating Reflector Fiber Laser for Vibration Measurement: Theoretical andExperimental Investigation with Emphasis on the Frequency Response (Bragg-Gitter Fiber-Laser for Vibrasjonsmaling)

机译：用于振动测量的布拉格光栅反射器光纤激光器：强调频率响应的理论和实验研究（用于Vibrasjonsmaling的布拉格 - Gitter光纤激光器）

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We develop a numerical model of an Er-doped optical fiber laser with a fiberBragg grating as one of the cavity mirrors. This model is used to simulate the response to of the system to a harmonic Bragg wavelength change, and also to optimize an experimental laser. The simulations indicate that we should be able to measure strains in the range 50-500 micrometer strain at frequencies of 1-10kHz. The response to small values of strain is not good, except for very low frequencies. We have built and tested a strain sensing Bragg grating fiber laser. The wavelength response to strain was as expected, but the WDM used in the demodulation was too polarization sensitive to be a practical device for this purpose. We tried to do measurements of dynamic strain, but these were not successful.

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