Improved second harmonic performance in periodically poled LNOI waveguides through engineering of lateral leakage

Improved second harmonic performance in periodically poled LNOI waveguides through engineering of lateral leakage

In this contribution, we investigate the impact of lateral leakage for linear and nonlinear optical waveguides in lithium niobate on an insulator (LNOI). Silicon nitride (SiN) loaded and direct patterned lithium niobate cross-sections are investigated. We show that lateral leakage can take place for...

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Veröffentlicht in:Optics express 2019-08, Vol.27 (17), p.23919
Hauptverfasser: Boes, Andreas, Chang, Lin, Knoerzer, Markus, Nguyen, Thach G, Peters, Jon D, Bowers, John E, Mitchell, Arnan
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container_end_page
container_issue 17
container_start_page 23919
container_title Optics express
container_volume 27
creator Boes, Andreas
Chang, Lin
Knoerzer, Markus
Nguyen, Thach G
Peters, Jon D
Bowers, John E
Mitchell, Arnan
description In this contribution, we investigate the impact of lateral leakage for linear and nonlinear optical waveguides in lithium niobate on an insulator (LNOI). Silicon nitride (SiN) loaded and direct patterned lithium niobate cross-sections are investigated. We show that lateral leakage can take place for the TE mode in LNOI ridge waveguides (X-cut lithium niobate), due to the birefringence of the material. This work gives guidelines for designing waveguides in LNOI that do not suffer from the lateral leakage effect. By applying these design considerations, we avoided the lateral leakage effect at the second harmonic wavelength of a nonlinear optical waveguide in LNOI and demonstrate a peak second harmonic generation conversion efficiency of ~1160% W cm .
doi_str_mv 10.1364/OE.27.023919
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title Improved second harmonic performance in periodically poled LNOI waveguides through engineering of lateral leakage
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