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Multi-Addressed Fiber Bragg Structures for Microwave-Photonic Sensor Systems.

Oleg Morozov¹, Airat Sakhabutdinov¹, Vladimir Anfinogentov²

¹Department of Radiophotonics and Microwave Technologies, Kazan National Research Technical University named after A.N. Tupolev-KAI, 10, Karl Marx st., 420111 Kazan, Tatarstan, Russia.

Sensors (Basel, Switzerland)

|May 14, 2020

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A new Multi-Addressed Fiber Bragg Structure (MAFBS) theory enhances Microwave Photonics Sensor Systems (MPSS). This technique uses unique optical notch frequencies to precisely measure sensor shifts via microwave-photonic conversion.

Area of Science:

Photonics
Optical Sensing
Microwave Engineering

Background:

Existing Addressed Fiber Bragg Structure (AFBS) sensors in Microwave Photonics Sensor Systems (MPSS) have limitations.
Advancements in Fiber Bragg Gratings (FBGs) enable more complex spectral features.

Purpose of the Study:

Introduce a novel theory and technique for Multi-Addressed Fiber Bragg Structure (MAFBS) in MPSS.
Develop a mathematical model for the additive response of a single MAFBS.
Enable precise measurement of central frequency shifts in MAFBS sensors.

Main Methods:

Utilized a specialized Fiber Bragg Grating (FBG) with multiple narrow notches (MAFBS).
Developed a mathematical model for the additive optical response of MAFBS.
Employed an optic filter with an oblique amplitude-frequency characteristic.

Keywords:

Addressed Fiber Bragg Structures Fiber Bragg Gratings Multi-Addressed Fiber Bragg Structures microwave-photonic sensor systems

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Published on: November 7, 2016

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Analyzed the complex electrical signal from a photodetector using address frequencies and microwave-photonic conversion.

Main Results:

Presented the mathematical model for MAFBS additive response.
Demonstrated that the photodetector output signal contains information for central frequency shift determination.
Successfully outlined a method for analyzing address frequencies to define MAFBS central frequency shifts.

Conclusions:

The MAFBS theory represents a significant evolution in optical sensing for MPSS.
The proposed method allows for accurate determination of central frequency shifts using microwave-photonic techniques.
MAFBS offers a promising new approach for advanced sensor applications.