scholarly journals Optical waveguides in lithium niobate: Recent developments and applications

2015 ◽  
Vol 2 (4) ◽  
pp. 040603 ◽  
Author(s):  
Marco Bazzan ◽  
Cinzia Sada
Keyword(s):  
Lithium Niobate ◽  
Optical Waveguides ◽  
Recent Developments

Laser Deposited Epitaxial Oxide Heterostructures as Prototype Ferroelectric Optical Waveguides

1992 ◽  
Vol 285 ◽  
Author(s):  
D. K. Fork ◽  
G. B. Anderson
Keyword(s):  
Lithium Niobate ◽  
Optical Waveguides ◽  
Pulsed Laser ◽  
Frequency Doubling ◽  
Deposition Process ◽  
Electro Optic ◽  
Out Of Plane ◽  
Recent Developments ◽  
Laser Sources ◽  
Epitaxial Oxide

ABSTRACTThe pulsed laser deposition process is a powerful tool for investigating prototype epitaxial structures. This report outlines recent developments in epitaxial structures which may usefully serve as ferroelectric optical waveguides. Emphasis is given to structures on semiconductor substrates, motivated by hybrid optical/semiconductor integration. Earlier pulsed laser deposited structures, such as BaTiO3/MgO/GaAs (100) are discussed in conjunction with current results on Z-lithium niobate on GaAs (111)A and GaAs (111)B. BaTiO3/MgO/GaAs (100) grows with cube-on-cube crystallography. The epitaxial system z-lithium niobate on GaAs (111)A and GaAs (111)B has been demonstrated both with and without intermediate MgO (111) layers. The in-plane epitaxial relationships are LiNbO3 [110] // GaAs [211] and [211] indicating the existence of 180° boundaries in the LiNbO3 with and without the MgO layer, which grows cube-on-cube with the GaAs. Out-of-plane texture is typically 1.0° and 1.2° for the MgO and LiNbO3 layers respectively. In-plane texture is typically 2.8° and 4.5° for MgO and LiNbO3 layers respectively. These and similar epitaxial systems may be useful for monolithic electro-optic or frequency doubling applications in conjunction with semiconductor laser sources.

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.

Fabrication and Characterisation of Reverse Proton Exchange Optical Waveguides in Neodymium Doped Lithium Niobate Crystals

2005 ◽  
Vol 480-481 ◽  
pp. 429-436
Author(s):  
M. Domenech ◽  
G. Lifante ◽  
F. Cussó ◽  
A. Parisi ◽  
A.C. Cino ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Optical Waveguides ◽  
Spectroscopic Properties ◽  
Proton Exchange ◽  
Fabrication Process ◽  
The Other ◽  
Ion Plating ◽  
Other Hand ◽  
Channel Waveguides ◽  
Lithium Niobate Crystals

In this work, the complete fabrication process which combines Proton Exchange (PE) and Reverse Proton Exchange (RPE) in Neodymium doped LiNbO3 channel waveguides is reported. To produce the PE-RPE channel waveguides the fabrication of dielectric SiO2 masks had to be implemented. For this propose, we adopted a technique based on the Ion Plating Plasma Assisted Deposition of SiO2 followed by the standard ultraviolet photolithographic patterning. On the other hand, we determined the main optical and spectroscopic properties of Nd3+ ions in the channel waveguides including the study of the lifetime as function as the polarisation.

Optical Interconnects and Interfaces for Electronic Subsystems

1992 ◽  
Vol 264 ◽  
Author(s):  
K. Rajasekharan ◽  
J.P. Krusius ◽  
J. Sutherland ◽  
G. George
Keyword(s):  
Research And Development ◽  
Time Scale ◽  
Optical Waveguides ◽  
Optical Interconnects ◽  
Electronic Computer ◽  
Computer Applications ◽  
Optical Interconnect ◽  
Optical Coupling ◽  
Optical Source ◽  
Recent Developments

AbstractThe potential, feasibility, and time scale of optical interconnect and interfaces are examined for electronic computer applications. Link, bus and random interconnect topologies are included. Recent developments in optical source and detector devices, optical waveguides and optical fiber characteristics are reviewed. Then optical coupling, alignment, interfacing and overall compatibility issues are explored. From this understanding the requirements for the packaging of optical interconnect are derived. Finally key research and development needs are defined.

Chromium diffusion in lithium niobate for active optical waveguides

1995 ◽  
Vol 78 (4) ◽  
pp. 2193-2197 ◽  
Author(s):  
José M. Almeida ◽  
Gerard Boyle ◽  
António P. Leite ◽  
Richard M. De La Rue ◽  
Charles N. Ironside ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Optical Waveguides ◽  
Chromium Diffusion

Structural and Optical Properties of Rare-Earth Doped Lithium Niobate Waveguides Formed by Mev Helium Implantation

1995 ◽  
Vol 396 ◽  
Author(s):  
B. Herreros ◽  
G. Lifante ◽  
F. CussÓ ◽  
A. Kling ◽  
J.C. Soares ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Rare Earths ◽  
Optical Waveguides ◽  
Bulk Material ◽  
High Energy ◽  
Structural And Optical Properties ◽  
Lattice Damage ◽  
Helium Implantation ◽  
Er Doped ◽  
Rare Earth Doped

AbstractResults of investigations of optical waveguides formed by high energy helium implantation into lithium niobate codoped with 5 mol% MgO and 1 mol% Tm3+ or 1 mol% Er3+ are reported. A comparative study of structural and luminescence properties between implanted and untreated samples has been performed by means of Rutherford backscattering (RBS) combined with channeling and photoluminescence methods, respectively in order to investigate residual lattice damage and the incorporation of the optical active rare earths. For the case of Tm a full substitutional incorporation on the lithium site and a high crystal quality in both bulk and implanted waveguide material has been found. For Er doped lithium niobate the channeling results show a fraction of Er randomly incorporated or forming precipitates and a deterioration of the waveguide's lattice. The optical investigations show in both cases only a slight broadening of the emission lines of the rare earths in the waveguides compared to the bulk material.

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