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Research on Dynamic Grating Cascaded Fiber Bragg Grating Fabry-Perot Cavity | IEEE Conference Publication | IEEE Xplore

Research on Dynamic Grating Cascaded Fiber Bragg Grating Fabry-Perot Cavity


Abstract:

With the development of optical fiber technology, the application of dynamic grating has been widely concerned, such as optical fiber sensor, tunable narrow-band filter, ...Show More

Abstract:

With the development of optical fiber technology, the application of dynamic grating has been widely concerned, such as optical fiber sensor, tunable narrow-band filter, fiber amplifier and so on. The erbium-doped fiber is selected as the dynamic grating, and one end of the erbium-doped fiber is connected. The forward wave is reflected by the Fiber Bragg Grating (FBG) to form a backward wave propagating backward. If the reflectivity of the Bragg grating is very close to 1, the standing wave field formed by the forward wave and the backward wave is perfect standing wave. The transmittance is calculated by the transmission matrix, and the grating parameters are converted into the control parameters in the writing process by the program-aided design, so as to guide the writing of the fiber grating. An important property of Fabry-Perot cavity is that its output spectrum can be dynamically modulated by adjusting parameters. Due to the adjustable parameters of the erbium-doped dynamic grating, compared with Fabry-Perot cavity composed of two identical fiber gratings, the parameters can be flexibly adjusted, and the fiber Bragg gratings at both ends of Fabry-Perot cavity can be fully symmetrical, which theoretically guarantees the optical performance 100% lossless transmission is conducive to the mode selection of Fabry-Perot cavity. The optical fiber Fabry-Perot cavity can be applied to the optical signal processing of optical fiber communication or the field of optical fiber sensing.
Date of Conference: 11-13 December 2020
Date Added to IEEE Xplore: 08 February 2021
ISBN Information:
Conference Location: Shenyang, China
Jilin Vocational College of Industry and Technology, Jilin, China

I. Introduction

FBG with different functions and applications in different situations will be penetrated into every corner of fiber communication and fiber sensing and play an irreplaceable role [1]. Due to its unique advantages, fiber Bragg grating sensor is widely used in modern industrial production and various fields in our daily life. Dynamic grating has important application potential in single frequency CW fiber laser, tunable narrow-band fiber filter, fiber sensor, adaptive interferometer and optical storage element [2]. The dynamic grating is usually formed by two coherent continuous laser waves with the same polarization propagating in the doped single-mode fiber [3]. The wavelength is written according to the absorption of rare earth ions [4].

Jilin Vocational College of Industry and Technology, Jilin, China

References

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