| Autor: |
J. Schauer, W. Ecke, K.-H. Jäckel, R. Willsch |
| Rok vydání: |
1996 |
| Předmět: |
|
| Zdroj: |
Optical Fiber Sensors. |
| DOI: |
10.1364/ofs.1996.th13 |
| Popis: |
A fibre-coupled Michelson interferometer has been developed for vibration measurement in seismic sensors for deep boreholes at temperatures up to 300°C. Results of long-term thermal stability tests of components and construction techniques have been used to develop a sensor device showing constant interference visibility at temperatures between 20 and 300°C. For application of high-resolution optical phase shift detection to a three-component seismic measuring system, three measuring interferometers and a fourth thermally stabilized all-fibre referencing interferometer with equalized unbalances are externally modulated by sinusoidal current modulation of a tunable 1.3 µm DFB diode laser source. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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