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Analisis Dan Simulasi Rangkaian Optoelektronik Berbasis Fiber Bragg Grating Gaussian Sebagai Sensor Detak Jantung Manusia
Fiber optic sensors based on Fiber Bragg Grating (FBG), which are small in size, resistant to electromagnetic interference, and can work with non-obtrusive materials, are a good alternative for monitoring human heart rate. The conventional method for monitoring heart rate in a Magnetic Resonance Imaging (MRI) environment, the electrocardiogram faces the problem of magnetohydrodynamic interference that alters the heart signal and magnifies the T wave. As an alternative to the Gaussian FBG sensor used for heart rate detection in MRI conditions. OptiGrating and OptiSystem software were used to design and analyze a Gaussian FBG-based heart rate sensor. The strain sensitivity of the resulting Gaussian FBG design is 3.31×10-5. Through changes in grating length and refractive index, the initial wavelength increases from 1549.46 nm to 1549.5 nm. By using an Optical Spectrum Analyzer and an Optical Power Meter, a consistent shift value of 0.08 nm was produced. In addition, the heart rate seen with an oscilloscope shows a value of 60 beats per minute. Simulation and analysis results show that this sensor shows a good response to pressure changes caused by heartbeats.
Keywords: Bragg, Grating, Heart, Fiber, Optics.
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