Enhancement of photoelasticity assisted by surface acoustic wave and its application to the optical modulator

2001 ◽  
Vol 84 (5) ◽  
pp. 46-54 ◽  
Author(s):  
Yasuhiko Nakagawa ◽  
Mitsuhiro Yawata ◽  
Shoji Kakio
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Optical Modulator

Frequency-shift keyed generation with an optically controlled GaAs field-effect transistor in a surface-acoustic-wave oscillator circuit

1987 ◽  
Vol 65 (8) ◽  
pp. 929-936
Author(s):  
O. Berolo
Keyword(s):  
Acoustic Wave ◽  
Frequency Shift ◽  
Surface Acoustic Wave ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Open Circuit ◽  
Low Noise ◽  
Optical Modulator ◽  
Oscillator Circuit ◽  
Effect Transistor

A prototype circuit for potential optical integration was developed and evaluated for the generation of frequency-shift keyed (FSK) signals by simultaneously exploiting surface-acoustic wave (SAW) technology and the optical response of the GaAs field-effect transistor (FET).A SAW delay line to be utilized in the feedback path of an oscillator circuit was designed for operation at the fundamental frequency of 111 MHz and operated at its 12th harmonic (1.33 GHz). A low-noise FET was incorporated into the circuit in series with the SAW delay, and a low-power He:Ne laser was focussed through an optical modulator onto the FET structure. The gate bias, which controls the phase shift in the feedback loop of the oscillator, was applied via the open-circuit photovoltage induced at the Schottky-barrier junction of the FET.The optical modulator was driven by a pseudorandom bit generator to obtain FSK generation by the oscillator circuit. Results of the frequency spectrum of the oscillator signal as a function of bit rate and light intensity on the FET were obtained. The successful performance of the circuit indicated that integration of all these elements on GaAs would yield a useful device for FSK signal generation.Un prototype de circuit pour intégration optique potentielle a été développé et évalué pour la génération de signaux FSK (frequency-shift keyed), en exploitant simultanéement la technologie des ondes acoustiques de surface et la réponse optique du transistor GaAs à effet de champ.

Surface acoustic wave optical modulator

1994 ◽  
Vol 96 (1) ◽  
pp. 614-614
Author(s):  
Faguir Jain ◽  
Kushal Bhattacharjee
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Optical Modulator

STUDY OF DEFECTS IN a-Ge AND a-GeHxUSING SURFACE ACOUSTIC WAVE TECHNIQUE

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-365-C4-368
Author(s):  
K. L. Bhatia ◽  
M.v. Haumeder ◽  
S. Hunklinger
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Wave Technique

Powder Transport by Surface Acoustic Wave Actuator using Bragg Reflection

2014 ◽  
Vol 134 (12) ◽  
pp. 1934-1935
Author(s):  
Tsunemasa Saiki ◽  
Yuya Matsui ◽  
Yasuto Arisue ◽  
Yuichi Utsumi ◽  
Akinobu Yamaguchi
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Bragg Reflection

Aluminum Nitride Thin Film Based Surface Acoustic Wave Sensors

2008 ◽  
Author(s):  
A. Kabulski ◽  
V. R. Pagán ◽  
D. Cortes ◽  
R. Burda ◽  
O. M. Mukdadi ◽  
...  
Keyword(s):  
Thin Film ◽  
Acoustic Wave ◽  
Aluminum Nitride ◽  
Surface Acoustic Wave ◽  
Acoustic Wave Sensors ◽  
Wave Sensors
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