Ang 1270nm hanggang 1610nm o 1550nm Fiber Bragg Grating FBGs ay isang uri ng diffraction grating na nabuo sa pamamagitan ng pana-panahong pagmodulate ng refractive index ng core ng fiber sa pamamagitan ng isang tiyak na paraan. Ito ay isang passive filter device. Ang mga grating fibers ay malawakang ginagamit sa mga larangan ng optical fiber communication, optical fiber sensing at optical fiber signal processing dahil sa kanilang maliit na sukat, mababang fusion loss, ganap na compatibility sa optical fibers at naka-embed na intelligent na materyales, at ang kanilang resonant wavelength ay sensitibo sa mga pagbabago. ng temperatura, strain, refractive index, konsentrasyon at iba pang panlabas na kapaligiran.
Ang Fiber Grating Hygrometer Humidity Sensor ay nakabalot sa stainless steel metal tube, at ang humidity sensitivity nito ay ginagamit upang subaybayan ang humidity. Ang sensor ay intrinsically ligtas, walang electromagnetic interference para sa temperatura at halumigmig na pagsubok.
A Phase Shifted FBG Fiber Bragg Grating introduces phase discontinuities into a fiber grating, creating a narrow transmission window in the FBG's reflection spectrum. The transmission wavelength varies with the amount of phase shift. Phase-shifted FBGs can be used as demultiplexers in dense wavelength division multiplexing (DWDM) systems. The magnitude, location, and point of the phase shift have a significant impact on the performance of the demultiplexer.
The wavelength of a pump laser diode varies at different operating temperatures. The 980nm pump FBG Fiber Bragg grating wavelength lock is used to stabilize the wavelength and intensity of the optically amplified pump laser. By precisely locking the pump laser diode through feedback of a small portion of the laser signal, this type of control significantly improves the power and wavelength output accuracy and reliability of the pump laser. Specifically, it eliminates spectral mode jumps in the pump laser, reduces power intensity fluctuations caused by temperature and pump drive current variations, and greatly improves the performance of the pump laser. It is also commonly used for stabilizing distributed feedback lasers in wavelength division multiplexing systems, the optical path of tunable lasers, and fiber resonators in Raman systems. Depending on the customer's locking requirements for the pump laser, single-grating or dual-grating configurations are available. The dual-grating configuration further improves the output spectral characteristics of uncooled pump lasers.
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