wavelengths
 

Extremely low loss laser optics

So-called supermirrors in ring laser gyroscope assemblies or certain scientific applications require coated optics with extremely low losses (i.e. absorption and scattering). These mirrors also have a maximum reflectivity with R > 99.998% and total losses < 10 ppm.

LASEROPTIK uses modified IBS machines that are capable to produce coatings on super-­poli­shed substrates. The cleanliness of the machi­nes and environment is maintained in dedicated cleanrooms, where also the ex­­­­ten­­sive substrate pre- and aftertreatment takes place.

Typical gyro mirrors
Typical gyro mirrors
 Scatter TSBAbsorptionReflection CRD
HR 532 nm / 0° 4.9 ppm1) (int. ARS) 10.2 ppm 2) > 99.997% 2) (T~5 ppm)
HR 633 nm / 0° 1.1 ppm 1)   > 99.998% (T~5 ppm)
HR 1064 nm / 0° (< 1 ppm) 3) < 2 ppm 4) > 99.999% (T~5 ppm)
HR 2940 nm / 0° 24 ±12 ppm6) 99.994% 5) (T=36 ppm)

1) Measured at IOF Jena;  2) Measured at LZH;  3) Calculated from surface roughness;  4) Measured at ILT Aachen;  5) measured by customer;  6) 1-R-T

A view into a cleanroom
A view into a cleanroom