The research on the relationship between transmittance and thickness of synthetic quartz with ultra-low absorption

As we all know, there is a strong correspondence between the transmittance of synthetic quartz and its thickness, the transmitting ability of synthetic quartz is usually measured based on standard thickness (10 mm). However, the thickness cannot be fixed as the standard in the application, and the value of transmittance needs to be characterized for all devices during precise optical design. Our work measured the transmittance from 1500 to 3300 nm using high-quality and low-hydroxyl synthetic quartz with different thicknesses. Our research verified that the transmittance shows an exponential relationship with thickness in synthetic quartz with ultra-low absorption from 2600 mm to 3300 mm. According to this result, we can get the transmittance of any devices in a specific thickness accurately, though products may not be under standard size.