Lithium niobate integrated-optics demonstration of optical control of microwaves

1990 ◽  
Author(s):  
Neelam Gupta ◽  
George J. Simonis ◽  
Paul R. Ashley
Keyword(s):  
Lithium Niobate ◽  
Integrated Optics ◽  
Optical Control

Testing lithium niobate boules for integrated optics applications

1986 ◽  
Vol 22 (12) ◽  
pp. 674 ◽  
Author(s):  
G.E. Peterson ◽  
S.R. Lunt
Keyword(s):  
Lithium Niobate ◽  
Integrated Optics

scholarly journals Optofluidic Platform Based on Liquid Crystals in X-Cut Lithium Niobate: Thresholdless All-Optical Response

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 908
Author(s):  
Fabrizio Ciciulla ◽  
Annamaria Zaltron ◽  
Riccardo Zamboni ◽  
Cinzia Sada ◽  
Francesco Simoni ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Light Intensity ◽  
Lithium Niobate ◽  
Photovoltaic Effect ◽  
Optical Control ◽  
Crystal Layer ◽  
Liquid Crystal Layer ◽  
Threshold Behaviour ◽  
All Optical

In this study, we present a new configuration of the recently reported optofluidic platform exploiting liquid crystals reorientation in lithium niobate channels. In order to avoid the threshold behaviour observed in the optical control of the device, we propose microchannels realized in a x-cut crystal closed by a z-cut crystal on the top. In this way, the light-induced photovoltaic field is not uniform inside the liquid crystal layer and therefore the conditions for a thresholdless reorientation are realized. We performed simulations of the photovoltaic effect based on the well assessed model for Lithium Niobate, showing that not uniform orientation and value of the field should be expected inside the microchannel. In agreement with the re-orientational properties of nematic liquid crystals, experimental data confirm the expected thresholdless behaviour. The observed liquid crystal response exhibits two different regimes and the response time shows an unusual dependence on light intensity, both features indicating the presence of additional photo-induced fields appearing above a light intensity of 107 W/m2.

Lithium Niobate active beam combiners: results of on-chip fringe locking, fringe scanning and high contrast integrated optics interferometry and spectrometry

2014 ◽  
Author(s):  
Guillermo Martin ◽  
Samuel Heidmann ◽  
Fabrice Thomas ◽  
Mikhael de Mengin ◽  
Laurent Jocou ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Integrated Optics ◽  
High Contrast ◽  
On Chip
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