Lithium niobate: electro-optic guided-wave optical switch

2001 ◽  
Author(s):  
Hideaki Okayama
Keyword(s):  
Lithium Niobate ◽  
Optical Switch ◽  
Guided Wave ◽  
Electro Optic

An Optical Switch Based on Electro-Optic Mode Deflection in Lithium Niobate Waveguide

2020 ◽  
pp. 1-1
Author(s):  
Xinyue Zhang ◽  
Huajiang Chen ◽  
Liling Liu ◽  
Jumei Shang ◽  
Lingyun Yu ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Optical Switch ◽  
Electro Optic

Slow Light Investigation on Power Consumption of Lithium Niobate Phc Switch Based on Linear Electro-Optic Effect

2020 ◽  
Vol 41 (2) ◽  
pp. 145-151 ◽  
Author(s):  
Zaineb Gharsallah ◽  
Monia Najjar ◽  
Vijay Janyani
Keyword(s):  
Refractive Index ◽  
Lithium Niobate ◽  
Applied Voltage ◽  
Slow Light ◽  
Optical Switch ◽  
Extinction Ratio ◽  
Refractive Index Change ◽  
Defect Mode ◽  
Index Change ◽  
Electro Optic

AbstractIn this work, an optical switch based on electro-optic effect is reported. We used defect mode in two-dimensional photonic crystal made of Lithium Niobate. Under an applied voltage of 3 V, a refractive index change of −0.0702 is obtained which has led to a transmittance contrast about 60% for the ON state and a high extinction ratio of about 20 dB. Moreover, Slow light structure performance is investigated to optimize proposed optic switch. Due to elliptic shape of holes, the applied voltage is decreased to 0.5 V. Also, a refractive index change decrease around −0.0481, a transmittance contrast increase 65 %, and an extinction ratio increase by 5 dB have been observed. We used plan wave expansion and finite difference time domain methods to analyze the structures performances. It is seen that a defect mode shift about 40 nm and a switching length of 6.48 μm are obtained with drive voltage of 3 V for simple structure and only 0.5 V for slow light structure.

scholarly journals Electro-Optic Control of Lithium Niobate Bulk Whispering Gallery Resonators: Analysis of the Distribution of Externally Applied Electric Fields

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 298
Author(s):  
Yannick Minet ◽  
Hans Zappe ◽  
Ingo Breunig ◽  
Karsten Buse
Keyword(s):  
Lithium Niobate ◽  
Electric Field ◽  
Electric Fields ◽  
Frequency Comb ◽  
Parametric Oscillation ◽  
Pockels Effect ◽  
Optical Mode ◽  
Cylindrical Resonator ◽  
Whispering Gallery ◽  
Electro Optic

Whispering gallery resonators made out of lithium niobate allow for optical parametric oscillation and frequency comb generation employing the outstanding second-order nonlinear-optical properties of this material. An important knob to tune and control these processes is, e.g., the linear electro-optic effect, the Pockels effect via externally applied electric fields. Due to the shape of the resonators a precise prediction of the electric field strength that affects the optical mode is non-trivial. Here, we study the average strength of the electric field in z-direction in the region of the optical mode for different configurations and geometries of lithium niobate whispering gallery resonators with the help of the finite element method. We find that in some configurations almost 100% is present in the cavity compared to the ideal case of a cylindrical resonator. Even in the case of a few-mode resonator with a very thin rim we find a strength of 90%. Our results give useful design considerations for future arrangements that may benefit from the strong electro-optic effect in bulk whispering gallery resonators made out of lithium niobate.

Increase of Side Band Powers in Parallel Phase Modulation by Lithium Niobate–based Electro-optic Crystal

2021 ◽  
Vol 51 (3) ◽  
pp. 738-745
Author(s):  
Minakshi Mandal ◽  
Rupali Maji ◽  
Sourangshu Mukhopadhyay
Keyword(s):  
Lithium Niobate ◽  
Phase Modulation ◽  
Side Band ◽  
Electro Optic

scholarly journals A Broadband High-Diffraction-Efficiency Electro-Optic Bragg Deflector Based on Monolithic Dual-Grating Periodically-Poled Lithium Niobate

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 242
Author(s):  
An-Chung Chiang ◽  
Yuan-Yao Lin ◽  
Shou-Tai Lin ◽  
Yen-Yin Lin
Keyword(s):  
Lithium Niobate ◽  
Wave Theory ◽  
Beam Radius ◽  
Acceptance Angle ◽  
Periodically Poled ◽  
Periodically Poled Lithium Niobate ◽  
Electro Optic ◽  
Recent Developments ◽  
Strong Focusing ◽  
Grating Design

Electro-optic (EO) Bragg deflectors have been extensively used in a variety of applications. Recent developments show that bandwidths and deflection efficiencies, as well as angular bandwidths, would significantly limit the utilization of EO Bragg deflectors, especially for applications which need strong focusing, such as intra-cavity applications. In this paper, we introduce a broadband EO Bragg deflector based on periodically-poled lithium niobate with a monolithic dual-grating design. We analyzed the deflection properties of this device by using a modified coupled wave theory and showed that this device can be still efficient for a small beam radius under strong focusing, whereas a single-grating one becomes very inefficient. Using a 1064-nm laser beam with a 100-μm beam radius, we obtained a 74% deflection efficiency with a 190-V bias voltage with a 0.5-mm-thick and 7.5-mm-long dual-grating sample. The acceptance angle for the Bragg condition of this device is as large as a few tens of mrad. The potential bandwidth of this device exceeds 500 nm if the proper operation region is chosen.

scholarly journals Broadband electro-optic frequency comb generation in a lithium niobate microring resonator

Nature ◽  
2019 ◽  
Vol 568 (7752) ◽  
pp. 373-377 ◽  
Author(s):  
Mian Zhang ◽  
Brandon Buscaino ◽  
Cheng Wang ◽  
Amirhassan Shams-Ansari ◽  
Christian Reimer ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Frequency Comb ◽  
Microring Resonator ◽  
Electro Optic ◽  
Comb Generation
Sign in / Sign up

Export Citation Format

Share Document