Nonlinear optical properties of LaCa(4)O(BO(3))(3)

Area of Science:

• Materials Science
• Crystallography
• Nonlinear Optics

Background:

• The GdCa4O(BO3)3 (GdCOB) family of materials is known for its nonlinear optical (NLO) properties.
• Exploring new isostructural members can lead to improved or alternative NLO materials.
• Lanthanum Calcium Oxyborate (LaCa4O(BO3)3 or LaCOB) is investigated as a potential NLO material.

Purpose of the Study:

• To synthesize and characterize the nonlinear optical properties of LaCOB.
• To compare the NLO performance of LaCOB with established NLO crystals.
• To determine the phase-matching characteristics of LaCOB for frequency doubling applications.

Main Methods:

• Growth of LaCa4O(BO3)3 (LaCOB) crystals.
• Measurement of nonlinear optical coefficients (d_eff, d_alphabeta, d_gammabeta) using comparative techniques.
• Determination of phase-matching angles and prediction of noncritical phase matching wavelength.

Main Results:

• LaCOB exhibits a nonlinear optical coefficient (d_eff) of 0.52±0.05 pm/V at 1064nm for type I frequency doubling.
• The nonlinear optical tensor coefficients (d_alphabeta and d_gammabeta) are found to be approximately ±0.26±0.04 pm/V and ±1.69±0.17 pm/V, respectively.
• LaCOB is predicted to be noncritically phase matched at 1042±1.5 nm.

Conclusions:

• LaCOB possesses significant nonlinear optical properties comparable to other known NLO materials.
• The material demonstrates potential for efficient frequency doubling applications.
• The predicted noncritical phase matching wavelength suggests practical advantages for laser system design.