At this stage, fiber Bragg gratings have the characteristics of large reflection bandwidth, low loss, excellent compatibility, strong anti-interference, and small size. They can be used to manufacture wavelength selectors, filters, lasers, displacement sensors, speed/acceleration sensors, temperature sensors, force sensors, etc.

Fiber Bragg grating (FBG) is a type of Bragg grating. It is an optical element with reflection function manufactured by introducing periodic refractive index changes in the fiber core. It is a grating that forms a spatial phase periodic distribution inside the fiber core.

According to the different periodic lengths of the refractive index, fiber Bragg gratings can be divided into two categories: short-period gratings and long-period gratings. The former has a refractive index period of less than 1 micrometer, also known as reflection gratings; the latter has a refractive index period greater than 1 micrometer, also known as transmission gratings. According to the different periodic changes in refractive index, fiber Bragg gratings can be divided into two categories: uniform gratings and non-uniform gratings. The former has a constant refractive index change period, while the latter has a variable refractive index change period.

In the 1980s, to meet the need for wavelength-selective reflection in optical fiber communication systems, British scientists proposed the concept of fiber Bragg gratings, which is based on the Bragg reflection principle. When light passes through the grating, there are differences in the degree of reflection of light with different wavelengths. Light that meets the reflection conditions is reflected, and the rest passes through. Since then, fiber Bragg grating technology has continued to progress, and its application areas have continued to expand.

At this stage, fiber Bragg gratings have the characteristics of large reflection bandwidth, low loss, excellent compatibility, strong anti-interference, and small size. They can be used to manufacture wavelength selectors, filters, lasers, displacement sensors, speed/acceleration sensors, temperature sensors, force sensors, etc. They are widely used in optical communications, electronics, sensing and detection, instrumentation, geological exploration, transportation, aerospace, and other fields. Among them, short-period gratings (reflection gratings) are mainly used in sensing, measurement, and other fields; long-period gratings (transmission gratings) are mainly used in the field of optical communications.

According to the "2024-2029 China Fiber Bragg Grating (FBG) Industry Market In-depth Research and Development Prospect Forecast Report" released by New Thinking Industry Research Center, under the background of continuously expanding downstream demand, the global fiber Bragg grating market continues to grow. In 2023, the global fiber Bragg grating market size was approximately 1.77 billion US dollars. It is expected that from 2023 to 2029, the global fiber Bragg grating market will continue to rise steadily, with a compound annual growth rate of 3.61%. It is expected that by 2029, the global fiber Bragg grating market size will reach 2.19 billion US dollars.

Globally, North America is the largest market for fiber Bragg grating demand, accounting for more than 30%, followed by Europe. The demand in Asia is growing fastest, exceeding the global average. The fiber Bragg grating industry in Europe and the United States started earlier, so relevant manufacturers are mainly concentrated in European and American countries in the global market.

Industry analysts from New Thinking Industry Research Center stated that the main representative companies of global fiber Bragg gratings include Advanced Optics Solutions in Germany, Alnair Labs in Germany, iXBlue in France, Smart Fibres Limited in the United Kingdom, Technica Optical Components in the United States, Technica in the United States, Optromix in the United States, ITF Technologies in Canada, and TeraXion in Canada.