| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 736995 | Sensors and Actuators A: Physical | 2009 | 8 Pages |
Abstract
We investigated the characteristics of electro-optic modulators composed of ZnTe and CdTe. Their modulation depths below 100 kHz depend both on wavelength and input light power. The characteristics are explained by considering both the photoconduction effect and the Schottky effect. To keep the modulation depth constant below 100 kHz, the wavelength of the light should be long enough to suppress the photoconduction effect. Using the ZnTe electro-optic modulator, we developed a sensitive voltage sensor that has constant sensitivity from DC to 30 MHz. Clear electrocardiograms can be obtained with the sensor.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Ai-ichiro Sasaki, Akinori Furuya, Mitsuru Shinagawa,