Recent Advances in Magnetostatic Waves-Based Integrated Magnetooptic Bragg Cell Modulators in Yig-Ggg Waveguides

1998 ◽  
Vol 517 ◽  
Author(s):  
Chen S. Tsai
Keyword(s):  
Diffraction Efficiency ◽  
Guided Wave ◽  
Bragg Diffraction ◽  
Gadolinium Gallium Garnet ◽  
Magnetostatic Wave ◽  
Recent Advances ◽  
Integration Architecture ◽  
Magnetostatic Waves ◽  
Hybrid Waveguide ◽  
Iron Garnet

AbstractThe most recent advances in the integration architecture and diffraction efficiency of magnetostatic wave (MSW)-based guided-wave magnetooptic (MO) Bragg cell modulators in yttrium iron garnet-gadolinium gallium garnet (YIG-GGG) waveguides are reported. A curved ion-milled hybrid waveguide lens pair has been integrated with a MO Bragg cell modulator in a taper waveguide with dimensions of 6.0x16.0mm2 to facilitate the collimation and focusing functions. An enhancement in the Bragg diffraction efficiency by two-to six-fold has been accomplished using a non-uniform bias magnetic field. An oscillator-based MO Bragg cell modulator has also been constructed and has provided a Bragg diffraction efficiency which is higher by a factor of two to four than that of a conventional delayline-based modulator.

RF MAGNETIZATION OF MAGNETOSTATIC FORWARD VOLUME WAVE IN A YIG-GGG LAYERED STRUCTURE WITH APPLICATION TO DESIGN OF HIGH-PERFORMANCE GUIDED-WAVE MAGNETOOPTIC BRAGG CELLS

1991 ◽  
Vol 02 (03) ◽  
pp. 185-208 ◽  
Author(s):  
Y. PU ◽  
C.S. TSAI
Keyword(s):  
Layered Structure ◽  
High Performance ◽  
Mode Conversion ◽  
Guided Wave ◽  
Bragg Diffraction ◽  
Gadolinium Gallium Garnet ◽  
Geometrical Parameters ◽  
Iron Garnet ◽  
First Time ◽  
Good Agreement

Explicit expressions for the RF magnetization of magnetostatic forward volume waves (MSFVW) generated by a microstrip line transducer in a Yttrium Iron Garnet-Gadolinium Gallium Garnet (YIG-GGG) layered structure sandwiched between two finite ground planes have been derived for the first time. The behavior of the RF magnetization as a function of various physical and geometrical parameters and its influence on the design of high-performance guided-wave magnetooptic (MO) Bragg Cells are studied in detail. The effects of DC bias magnetic field and geometrical parameters on the RF magnetization and thus the MO Bragg diffraction or mode-conversion efficiency and the bandwidth are presented in plots generated using a computer. A good agreement between computed and experimental results has been obtained.

Magnetooptic Waveguide Material Structures and Devices

1999 ◽  
Vol 597 ◽  
Author(s):  
Chen S. Tsai ◽  
Jun Su
Keyword(s):  
Tuning Range ◽  
High Efficiency ◽  
Frequency Tuning ◽  
Guided Wave ◽  
Bragg Diffraction ◽  
Gadolinium Gallium Garnet ◽  
Material Structure ◽  
Optical Scanners ◽  
Integrated Optic Devices ◽  
Iron Garnet

AbstractRecent advances in the techniques for preparation of Ce-doped yttrium iron garnet (YIG) films on gadolinium gallium garnet (GGG) and semiconductor substrates, hybrid material structures of YIG/GGG- gallium arsenide (GaAs) combination, and the resulting microwave and guided-wave magnetooptic (MO) devices are presented. For example, high-efficiency MO Bragg cell modulators using the YIG/GGG-alumina material structure have been realized using a non-uniform bias magnetic field as well as an electronic feedback. Such MO modulators are being used to construct integrated optic devices such as optical scanners, switches, and frequency shifters. Also, a wideband microwave bandstop filter with a carrier frequency tuning range as high as 2.5 to 23.0 GHz using the YIG/GGG-GaAs material structure has been realized. The same material structure can be employed to perform MO Bragg diffraction experiment at ultrahigh carrier frequencies.

Spectral Domain Magneto-Optical Magnetometry

2012 ◽  
Vol 190 ◽  
pp. 373-376
Author(s):  
M. Mansurova ◽  
O.V. Kolokoltsev
Keyword(s):  
Yttrium Iron Garnet ◽  
Guided Wave ◽  
Gadolinium Gallium Garnet ◽  
Pulsed Magnetic Fields ◽  
Yttrium Iron ◽  
Wave Regime ◽  
Optical Magnetometry ◽  
Spin Excitations ◽  
Saturation Effects ◽  
Iron Garnet

In this work we present a new concept for measuring high intensity pulsed magnetic fields (h (t)) through the spectral analysis of spin excitations in a saturated yttrium-iron garnet (YIG) thin film grown on a gadolinium gallium garnet (GGG) substrate. The spectrum of spin excitations, generated in the sample by picosecond h (t), was determined with the help of a magnetooptical (MO) Faraday probe in the guided wave regime of lightwave propagation. This technique, compared to the standard MO cells, allows one to avoid saturation effects because the amplitude of h (t) is measured in the frequency domain, and allows us to realize the analysis in real time taking advantage of strong a MO signal.

scholarly journals Crystallization of Bi-substituted iron garnet bi-layers

2021 ◽  
Vol 2086 (1) ◽  
pp. 012044
Author(s):  
T V Mikhailova ◽  
Yu E Vysokikh ◽  
A N Shaposhnikov ◽  
V N Berzhansky ◽  
S Yu Krasnoborodko ◽  
...  
Keyword(s):  
High Performance ◽  
Crystallization Process ◽  
Process Parameter ◽  
Gadolinium Gallium Garnet ◽  
Semiconductor Technology ◽  
Sputtering Deposition ◽  
Fused Quartz ◽  
Iron Garnet ◽  
Substrate Types

Abstract Magneto-optical (MO) structures are widely used for different application in the fields of magnetoplasmonics, magneto-optics, photonics e.t.c. Bi-substituted iron garnet (Bi:IG) is high-performance MO material. Integration of Bi:IG films to silicon semiconductor technology gives new opportunities to create nanoscale hight performance MO devices. Vacuum sputtering deposition allows to fabricate Bi:IG structures on different substrate types. Authors investigate crystallization process of Bi:IG bi-layers in a different process parameter (different layers composition and its thickness, temperature and time of annealing) using gadolinium gallium garnet GGG and fused quartz SiO2 substrates to determine dependences which impact on crystallization.

scholarly journals Solution of Some Problems oOf Single-Scale Wavelet Transform Processor Using a Magnetostatic Surface Wave Device

2012 ◽  
Vol 19 (4) ◽  
pp. 685-692 ◽  
Author(s):  
Wenke Lu ◽  
Lun Kuang ◽  
Xiaozhou Lü ◽  
Changchun Zhu ◽  
Ting Zhang ◽  
...  
Keyword(s):  
Wavelet Transform ◽  
Surface Wave ◽  
Insertion Loss ◽  
Direct Coupling ◽  
Propagation Loss ◽  
Magnetostatic Wave ◽  
Single Scale ◽  
Magnetostatic Surface Wave ◽  
Interdigital Transducer ◽  
Iron Garnet

Abstract In this paper, we investigate the implementation schemes of a single-scale wavelet transform processor using magnetostatic surface wave (MSSW) devices. There are three implementation schemes: the interdigital transducer, the meander line transducer and the grating transducer. Because the interdigital transducer has excellent properties, namely, good frequency characteristic and low insertion loss, we use the interdigital transducer as the implementation scheme of a single-scale wavelet transform processor using MSSW device. In the paper, we also present the solutions to the three key problems: the direct coupling between the input transducer and the output transducer, the insertion loss, and the loss characteristics of the gyromagnetic film having an influence on the wavelet transform processor. There are two methods of reducing the direct coupling between the input transducer and the output transducer: increasing the distance between the input transducer and the output transducer, and placing a metal “wall” between the input transducer and the output transducer. There also are two methods of reducing the insertion loss of a single-scale wavelet transform processor using a MSSW device for scale: the appropriate thickness of the yttrium iron garnet (YIG) film and the uniform magnetic field.The smaller the ferromagnetic resonance linewidth of the gyromagnetic film , the smaller the magnetostatic wave propagation loss.

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