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Acousto-Optic Q-Switches
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Acousto-Optic Q-Switches
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Intracavity Q-switching devices with high damage threshold and high modulation loss
The Acousto-optic Q-switches (AOQS) are a type of Q-switch designed for laser Q-switching applications. At the beginning of pumping, the AOQS increases the diffraction loss in the cavity, causing the cavity to be in a low Q-value state, which increases the oscillation threshold and prevents oscillation from occurring. This allows a large number of inverted particles in the upper energy level to accumulate. When the accumulation reaches saturation, suddenly removing the diffraction loss causes the cavity loss to decrease and the Q-value to suddenly increase, rapidly establishing laser oscillation. In a very short period of time, the inverted particles in the upper energy level are consumed and converted into optical energy in the cavity, resulting in high-peak-power giant pulse laser output.
CASTECH can provide a variety of A-O Q-switches with operating wavelength ranges covering 310 nm-10.6 um. Our products have high transmittance (single pass transmittance up to 99.6%), fast switching speed, strong shut-off capability, high damage threshold, and excellent pulse stability. To achieve higher diffraction efficiency, large aperture A-O Q-switches require higher RF power injection. Therefore, water cooling is needed to ensure proper heat dissipation of the device.
Applications：
●Laser marking
●Medical procedure
●Material processingCASTECH's products are produced independently throughout the entire process and can be customized according to customer needs. Refer to the following list for standard products.
Key words:- Acousto-optic Q-switch
- laser Q-switching
- high switching speed
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