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Products and Applications
Terahertz Wave Generation
Terahertz (THz) waves are electromagnetic waves located between microwaves and infrared rays, characterized by high frequency stability and short pulse features. The photoconductive effect refers to the increase in electrical conductivity of certain materials when illuminated by light due to the generation of photogenerated carriers. Utilizing this effect, a periodic sequence of optical pulses (i.e., an optical frequency comb) can be injected into photoconductive materials to generate a periodic sequence of current pulses, thereby producing corresponding electromagnetic waves in the terahertz band. Injecting an optical frequency comb into photoconductors can excite high-quality terahertz (THz) waves.
Terahertz optical frequency comb technology combines the high coherence of optical frequency combs with the unique advantages of the terahertz band. It has important applications in high-resolution spectral detection and time-resolved dynamics research, with significant value for the national economy and national security. The main application areas include: 1) Precision measurement and spectral analysis: Due to its high frequency stability and ultra-low phase noise, terahertz optical frequency combs can be used for precise spectral measurements to analyze molecular structures and chemical compositions of substances. This is crucial for fundamental scientific research and materials science. 2) Biomedical imaging: Terahertz waves can penetrate biological tissues and are sensitive to water molecules, giving terahertz optical frequency combs great potential in medical imaging fields such as skin cancer detection and histopathological studies. 3) Security screening: Terahertz optical frequency combs can detect and identify weapons, explosives, and other items hidden under non-metallic materials, making them important in security checks such as airport security and customs inspections. 4) Astronomical observation: Optical frequency combs in the terahertz band are also used in astronomy to study molecular clouds, star-forming regions, and other phenomena in the universe, which is significant for astronomical research. 5) Materials science: Terahertz optical frequency combs can be used to study the electronic structure and dynamic processes of materials, providing important value for research on semiconductors, superconductors, and other physical properties. 6) Industrial process control: In manufacturing, terahertz optical frequency combs can be used for non-destructive testing, monitoring product quality, controlling production processes, and improving industrial efficiency and quality. 7) Environmental monitoring: Terahertz optical frequency combs can monitor atmospheric pollutants and analyze climate change, playing an important role in environmental protection and climate research. 8) Integrated circuits and chip technology: With the development of integrated circuits and chip technology, the demand for terahertz band light sources and detectors is increasing to achieve faster electronic devices and systems. 9) Fundamental physics research: Terahertz optical frequency combs are also applied in fundamental physics research, such as testing physical constants and exploring new physical phenomena.
Our company has developed a highly stable, repetition frequency tunable optical frequency comb for terahertz wave generation, solving the instability issues caused by repetition frequency drift in previous products. It supports one-key locking, is easy to operate, offers high locking accuracy, and has low added noise.
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