NLO Crystals
  LBO
  BIBO
  KTP
  GTR-KTP
  RTP
  KTA
  BBO
Laser Crystals
Electro-optics crystals
Optical Components

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KTP
 Potassium Titanyl Phosphate (KTiOPO4 or KTP) is a nonlinear optical crystal, which possesses excellent nonlinear and electro-optic properties. It has large nonlinear optical coefficients and wide angular bandwidth and small walk-off angle, etc. which make it suitable for various nonlinear frequency conversion and wave guide online-ordering.
Due to very high effective nonlinearity (deff ~8.3×d36 (KDP) at 1.06μ m) and excellent optical properties, KTP perfectly suits as lasing material in various online-ordering. The phase matching range of KTP crystal lies in 0.99-3.3 μ m region .This allows us to use KTP as an intracavity and extracavity frequency double for the most commonly used lasers, such as Nd:YAG, Nd:Glass and Nd:YLF.
Properties

Crystal Structure

Orthorhombic, space group Pna21,point group mm2

Lattice Parameter

Melting Point   

About 1172°C

Mohs Hardness   

5

Density         

3.01g/cm3

Thermal Conductivity  

13W/m·K

Thermal Expansion Coefficient

αx=11x10-6/°C, αy=9x10-6/°C,αz=0.6x10-6/°C

Transparency Range

350～4500nm

SHG PM Range

497～1800nm(Type II)

Thermal-optical Coefficients(/°C)

dnx/dT=1.1X10-5
dny/dT=1.3X10-5
dnz/dT=1.6X10-5

Absorption  Coefficients

<0.1%/cm at 1064nm; <1%/cm at 532nm

For Type II SHG of a Nd:YAG laser at 1064nm

Temperature Acceptance: 24°C-cm
Spectral Acceptance: 0.56nm-cm
Angular Acceptance: 14.2mrad-cm(φ); 55.3mrad-cm (θ)
Walk-off Angle: 0.55°

NLO Coefficients

deff(II)≈(d24-d15)sin2φsin2θ-(d15sin2φ+d24cos2φ)sinθ

Non-vanished NLO susceptibilities

d31=6.5pm/V ;d24=7.6pm/V; d32=5pm/V ;d15=6.1 pm/V; d33=13.7pm/V

Sellmeier  Equations
(λ in μm)     

nx2=3.0065+0.03901/(λ2-0.04251)-0.01327λ2
ny2=3.0333+0.04154/(λ2-0.04547)-0.01408λ2
nz2=3.3134+0.05694/(λ2-0.05658)-0.01682λ2

KTPs Applications

  1. Frequency doubling (SHG) of Nd-doped lasers for green/red outputs.
  2. Frequency mixing (SFM) of Nd lasers and diode lasers for blue outputs.
  3. Parametric sources (OPG, OPA and OPO) for 600nm-4500nm tunable outputs.
  4. E-O modulators, optical switches, directional couplers.
  5. Optical waveguides for integrated NLO and E-O devices

Specification of Sino-crystal's KTP