The growing laser market requires more and more complex coatings working simultaneously at many different wavelengths with different optical requirements.
Besides standard multi-line coatings described in previous chapters, e.g. "Combinations of harmonics" and "OPO", LASEROPTIK offers customized coatings.
For difficult multi-line coatings normally IBS will be the appropriate coating technique of choice as it combines highest precision in film growth and thermal stability.
Besides transmission or reflection of course other optical properties like GD or GDD can be optimized, see item "Dispersive coatings".
Sometimes it is necessary to use different filter coatings on a pair of substrates or on the front and rear surface of an optic.
The example above has a broadband long wave pass coated on the front and a gain flattener on the rear surface for superposition of the deuterium and halogen lamp spectra. As shown, the measured reflection (red line) complies with the computed values (black line). This proofs the high precision of the IBS-coating technique.
All values are given for standard coatings. Customized coatings available for all types.
Coating methods available:
If not mentioned otherwise, all values and diagrams are given
... for the standard substrate material used in the described wavelength area (mostly Fused Silica or CaF2).
... without consideration of the rear surface.
... with EBE coating technique for a good cost-performance ratio.
Customized coatings are available for all types.
–––– dashed lines show the zoomed curve with the stated magnification
1064-1079 nm: R ±2% vs. curve;
1320-1340 nm + 1430-1450 nm: R ±5% vs. curve
500 nm: T ±2%; linear progress with about (avg)
±2% vs. curve; 800 nm: T > 98% (IBS-coating)
360-390 nm: T < 1%; 410-680 nm: gain flattening
filter; 720-1100 nm: T < 1% (IBS-coating)
633 nm: T > 30%; 750-1470 nm: Tavg < 0.5%;
1535 nm: T > 90%; 1600-1800 nm: Tavg < 1%
460 nm: Rp < 2%; 525 nm: Rp < 8%;
532 nm: Rs > 98.5%;
630 nm: Rp < 8%; 637 nm: Rs > 97%
399 nm: R > 99.5%; 532-578 nm: Ravg < 0.5%;
660+759 nm: R > 99.8%; 1064 nm: R < 0.5%
Every coating type can be optimized
• substrate material
• angle of incidence
• GDD value
Alternatively we can create
a totally new design for you.