1. High-temperature challenges of material processing to 1064nm spatial AOM
In industrial material processing scenarios (such as laser cutting, welding, and surface treatment), the operation of the equipment generates a lot of heat, and the temperature of the processing area is often at a high level (up to 50-80℃). As a key component of laser modulation, the 1064nm spatial AOM needs to operate stably in a high-temperature environment to ensure that the laser parameters (frequency, intensity, pulse width) are accurately controllable. High temperature may affect the performance of the AOM acousto-optic medium and the working state of the piezoelectric transducer, resulting in a decrease in diffraction efficiency, a slow modulation speed, and a decrease in extinction ratio, which in turn affects the quality of material processing.
2. Test plan design and equipment construction
(I) Test objectives and parameters
Focus on the diffraction efficiency, rise time, extinction ratio, damage threshold and other parameters of 1064nm spatial AOM in high temperature environment, verify its high temperature stability, and simulate the continuous operation scenario of industrial material processing.
(II) Experimental equipment and environment
Select multiple models of 1064nm spatial AOM (such as SGT80-1064-2TA, SGT300-1064-0.2TA), build a high temperature test platform, including a high temperature test chamber (temperature control range 25-100℃), 1064nm high-power laser, high-precision optical power meter, and RF signal generator. Place the AOM in a high temperature chamber to simulate the high temperature environment of material processing and continuously monitor its performance changes.
3. Key performance measurement and analysis
(I) Diffraction efficiency stability
The AOM diffraction efficiency was measured at different temperatures. After continuous operation at 50℃ for 4 hours, the diffraction efficiency of the SGT80-1064-2TA model was still ≥80%, and that of the SGT300-1064-0.2TA was ≥78%. High diffraction efficiency ensures effective use of laser energy. When laser cutting a 3mm thick stainless steel plate, the stable diffraction efficiency at high temperature can make the cutting slit width uniform (≤0.1mm) and the edge smooth, avoiding problems such as rough cutting surface and broken wires caused by energy fluctuations.
(II) Rise time and modulation speed
In high temperature environments, the AOM rise time increases slightly, but the rise time of the SGT200-1064-0.3TA model is still <20ns, which meets the requirements of material processing for fast laser pulse modulation. In laser welding of electronic components, fast modulation can accurately control the laser energy output, achieve small solder joints (diameter ≤ 0.2mm), high strength, and ensure the reliability of electronic components.
(III) Extinction ratio and damage threshold
>1000:1 extinction ratio remains stable at high temperature, and the damage threshold is ≥10W/square millimeter. The high extinction ratio allows the laser to be clearly "on-off". In the laser surface quenching process, the quenching area and depth can be accurately controlled; the high damage threshold enables the AOM to withstand long-term irradiation of high-power lasers, and in continuous laser engraving operations, it ensures the durability of the device and reduces equipment downtime caused by high-temperature damage.
4. Actual measurement summary and application suggestions
Through actual measurements, the 1064nm spatial AOM shows good industrial-grade high-temperature stability, and key performance such as diffraction efficiency and extinction ratio can still meet material processing requirements in high-temperature environments. In practical applications, it is recommended to reasonably select the AOM model according to the temperature characteristics of the processing materials (such as metals, non-metals) and processes (cutting, welding, engraving); with an efficient heat dissipation system (such as air cooling, water cooling), further optimize the high-temperature working environment and improve the overall stability and processing accuracy of the equipment.
The 1064nm spatial AOM has become a reliable optical modulation core in the field of material processing with its industrial-grade stability verified by actual measurements. From high-temperature performance measurements to application adaptation suggestions, it provides technical references for laser processing equipment manufacturers and industrial production enterprises, helps material processing develop in a more refined and stable direction, and promotes industrial manufacturing upgrades.