Caesium lithium borate

CsLiB₆O₁₀ (Cesium Lithium Borate, CLBO) is a non-linear crystal for UV applications and generates the 4th. and 5th. harmonics of the Nd:YAG fundamental laser wavelength (1064nm).

Properities

• Transparency range : 180(nm) - 2750(nm)
• Symmetry : tetragonal, point group 4m2
• Cell parameters : a = 10.494, c = 8. 939 Å
• Mohs hardness : 4
• Refractive indexes:
  • at 1064 nm : no= 1.4852; ne = 1.4353
  • at 532 nm : no = 1.4985; ne = 1.4462
  • Sellmeier equations (Range:of 400 - 2400nm ; Ref: Proc. SPIE , 4453, 106 (2001))

    $n_{o}^{2}=2.2145+{\frac {0.00890}{\lambda ^{2}-0.02051}}-0.01413\lambda ^{2}$

    $n_{e}^{2}=2.0588+{\frac {0.00866}{\lambda ^{2}-0.01202}}-0.00607\lambda ^{2}$

• Non-linear coefficient at 1064 nm : d36 = 0.86(pm/V)
• Optical damage threshold : 25 GW/cm2 (1064 nm; 1,1 ns pulses)
• Work off:
  • at 532 nm : 1.83°
  • at 488 nm : 0.98°
• Cut off SHG : 471 nm
• Chemical properties : slightly hygroscopic

Nonlinear Optical Properties of CLBO

File:NLO Properties of CLBO.jpg
(Ref:Y. Mori, I. Kuroda, S. Nakajima, T. Sasaki, and S. Nakai, Appl. Phys. Lett. 67, 1818 (1995)
Y. Mori, Y. K. Yap, M. Inagaki, S. Nakajima, A. Taguchi, W. L. Zhou, and T. Sasaki, in Advanced Solid-State Lasers, Vol. 1 of Topics in Optics and Photonics(OSA, Washington, D.C., 1996),p. 341.)

Applications

• generation highest harmonics (SHG, THG, 4HG, 5HG) of laser radiation Nd:YAG
• generation second, third lasers harmonics on the alexandrite, Ti:Sapphire

Further reading

• D. Gerstenberger, T. Trautmann, and M. Bowers, "Noncritically phase-matched second-harmonic generation in cesium lithium borate ," Opt. Lett. 28, 1242-1244 (2003)