## Optical constants of KTiOPO_{4} (Potassium titanyl phosphate, KTP)

Kato and Takaoka 2002: n(β) 0.43–3.54 µm

Wavelength:
µm

(0.43–3.54)

### Complex refractive index (*n+ik)*

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2=3.45018+\frac{0.04341}{λ^2-0.04597}+\frac{16.98825}{λ^2-39.43799}$$### Comments

n_{β}; 20 °C.

### References

K. Kato and E. Takaoka. Sellmeier and thermo-optic dispersion formulas for KTP, *Appl. Opt.* **41**, 5040-5044 (2002).

### Data

## INFO

### Potassium titanyl phosphate, KTiOPO_{4} (KTP)

Potassium titanyl phosphate (KTiOPO_{4}, commonly abbreviated as KTP) is a nonlinear optical material widely used in a variety of photonic applications, including frequency doubling of laser sources, optical parametric oscillation, and electro-optic modulation. KTP exhibits a broad transparency range from approximately 350 nm to 4.5 μm. One of its noteworthy advantages is its high damage threshold, which makes it suitable for high-power laser applications. The crystal also exhibits good phase-matching conditions over an extensive range of wavelengths, making it a material of choice for tunable and multi-wavelength laser sources. It's commonly utilized in green laser pointers via frequency doubling of Nd:YAG or Nd:YVO

_{4}lasers, which emit at 1064 nm. Overall, KTP's combination of optical and mechanical properties make it an important material in the field of nonlinear optics.