Magical frequency shift principle
The acousto-optic frequency shifter AOFS, as the name suggests, has the main function of changing the frequency of light. When light and sound waves meet in a specific medium, something amazing happens. When light is scattered from the diffraction grating generated by the sound wave, a Doppler frequency shift occurs. Simply put, if light passes through the crystal in the same direction as the sound wave, the frequency of the diffracted beam will increase; conversely, if the light and sound waves propagate in opposite directions, the frequency of the diffracted beam will decrease. The specific value of the frequency change depends on the output frequency of the acousto-optic RF driver. This process seems simple, but it contains profound physical principles. It is this principle that gives AOFS the ability to accurately control frequency in optical systems.
Frequency shift accuracy ±0.1MHz: the power of precision
In many optical measurement technologies, accuracy is often the key factor that determines success or failure. One of the most striking features of the acousto-optic frequency shifter AOFS is its frequency shift accuracy of up to ±0.1MHz. What does this high accuracy mean? Taking laser Doppler velocimetry as an example, AOFS can provide extremely accurate frequency offsets in scenarios such as speed measurement of high-speed moving objects on industrial production lines and accurate capture of the speed of microscopic particles in scientific research. It can convert tiny speed changes into accurately measurable frequency changes, making the measurement results more reliable. Whether it is detecting the movement speed of parts in automobile manufacturing or studying the flow rate of fluids in scientific research experiments, the frequency shift accuracy of ±0.1MHz can ensure the accuracy of the measurement and provide a solid data foundation for subsequent analysis and decision-making.
The core role of laser Doppler velocimetry
In the laser Doppler velocimetry system, AOFS plays an irreplaceable core role. The principle of laser Doppler velocimetry is based on the Doppler frequency shift effect generated when laser interacts with moving objects. AOFS can precisely control the offset of the optical frequency, making the frequency shift signal generated by the laser after interacting with the moving object clearer and more accurate. It is like a precise "tuner", adjusting the most accurate "frequency note" for the laser Doppler velocimetry system, allowing the system to keenly perceive the speed of the object. With the help of AOFS, the laser Doppler velocimetry system can not only measure the speed of macroscopic objects, but also accurately measure the speed of tiny particles in the microscopic world, greatly expanding the application scope of laser Doppler velocimetry technology.
Technical support behind
The outstanding performance of the acousto-optic frequency shifter AOFS is inseparable from the strong technical support behind it. From the careful selection and processing of crystal materials (such as TeO₂, quartz, etc.) to the coating and manufacturing process of the device, every link has been strictly controlled. The professional R&D and manufacturing team has mastered exquisite craftsmanship in the growth and processing of crystal materials, and is able to find a balance between many parameters that affect each other, ensuring that AOFS can work stably and accurately in different working environments.
The acousto-optic frequency shifter AOFS has become a shining "star" in the field of optoelectronics with its unique frequency shift principle, high-precision frequency shift capability, and core applications in the fields of laser Doppler velocimetry. With the continuous advancement of technology, it is believed that it will play an important role in more fields and bring more surprises to optical measurement technology.