KTP (potassium titanyl phosphate, KTiOPO4) is a nonlinear optical crystal used for frequency conversion. In a suitably designed green laser, KTP can frequency-double 1064 nm light to 532 nm. Nd:YVO4 has a different role: it is the laser gain medium that generates the fundamental light. These materials are separate components and are not interchangeable.
KTP and Nd:YVO4: different roles in a green laser
| Material | Role | Specification focus |
|---|---|---|
| Nd:YVO4 | Laser gain medium; supports 1064 nm operation in an appropriate cavity | Nd concentration, orientation, dimensions, pump absorption and coatings |
| KTP | Nonlinear crystal; converts part of the fundamental light to its second harmonic | Phase-matching configuration, length, aperture, coatings and operating conditions |
Review the Nd:YVO4 laser crystal specifications for the gain-medium side of the design. That product page describes Nd:YVO4, not a KTP crystal.
What determines frequency-conversion performance?
Frequency doubling requires an appropriate phase-matching configuration. Crystal orientation, polarization and temperature must be considered together with the input beam. Conversion efficiency is a system result, not a fixed percentage guaranteed by the material name.
Published KTP supplier data include type-II second-harmonic-generation configurations for 1064 nm lasers. Use such references to understand the design variables; confirm the cut, coating and acceptance criteria for the actual component being ordered.
Prepare the requirements before requesting a quotation
- Identify whether the inquiry is for a gain crystal, a frequency-conversion crystal or both.
- Specify the input and output wavelengths and the intended optical layout.
- State CW or pulsed operation, optical power or pulse energy, repetition rate and pulse duration where applicable.
- Provide beam dimensions, polarization and the proposed operating-temperature range.
- Include a drawing with crystal dimensions, aperture, orientation, tolerances and coating requirements.
- Agree which inspection records and optical tests are included in the quotation.
Related laser materials and inquiries
Browse ATR Crystal’s laser crystal range for available gain and passive Q-switch materials. For a project-specific material request, send your specifications to technical sales. Availability and the scope of supply must be confirmed before quotation.
Technical reference
Newlight Photonics: KTP properties and applications provides material information and frequency-conversion examples. Its published values describe that supplier’s reference material and are not ATR inspection results or guaranteed specifications.