General Optics provides W-Coatings engineered to minimize reflectance at two distinct laser wavelengths simultaneously. These coatings are ideal for multi-line laser systems and harmonic generation setups where two operating wavelengths must be optimized within the same optical path. Each W-Coating is custom-designed to order, ensuring precise spectral performance, high durability, and full compatibility with customer-specific laser systems.
Representative Wavelength Combinations
- 532 nm & 1064 nm
(Nd:YAG fundamental + second harmonic) - 355 nm & 532 nm
(Third + second harmonic Nd:YAG) - 1064 nm & 1550 nm
(Multi-band laser systems, defense and telecom applications)
Applications
- Frequency-doubled or tripled Nd:YAG laser systems
- Medical laser systems requiring dual-line transmission
- Military and aerospace optics with multi-band operation
- Research-grade multi-wavelength optical instruments

