Total internal reflection quasiphase matching-based broadband second harmonic generation in a plane-parallel uniaxial crystal of lithium niobate

Minakshi Deb Barma; Sumita Deb; Ardhendu Saha

doi:10.1117/1.OE.57.1.017106

9 January 2018 Total internal reflection quasiphase matching-based broadband second harmonic generation in a plane-parallel uniaxial crystal of lithium niobate

Minakshi Deb Barma, Sumita Deb, Ardhendu Saha

Author Affiliations +

Optical Engineering, Vol. 57, Issue 1, 017106 (January 2018). https://doi.org/10.1117/1.OE.57.1.017106

Abstract

The present work analytically investigates the generation of broadband second harmonic (SH) using total internal reflection (TIR) quasiphase matching technique in a plane-parallel uniaxial crystal having optic axis nonparallel with respect to the horizontal base. A computer-aided simulation has been performed using lithium niobate as the nonlinear material to determine the possibility of generating broadband SH intensity when broadband fundamental laser radiation is allowed to undergo TIR inside the crystal. The simulated results indicate a peak conversion efficiency of 5.22% with a spectral bandwidth (BW) of 116 nm, centered at 2.258 μm in a 10-mm-long slab. The effect of variation in operating temperature, crystal length, crystal thickness, angle of deviation of optic axis, and angle of incidence of fundamental beam at the air–prism interface on efficiency and BW of resulting SH output has been studied.

Citation Download Citation

Minakshi Deb Barma, Sumita Deb, and Ardhendu Saha "Total internal reflection quasiphase matching-based broadband second harmonic generation in a plane-parallel uniaxial crystal of lithium niobate," Optical Engineering 57(1), 017106 (9 January 2018). https://doi.org/10.1117/1.OE.57.1.017106

Received: 9 August 2017; Accepted: 4 December 2017; Published: 9 January 2018

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