Abstract
A practical sensor with high sensitivity for the temperature measurement by using a highly birefringent (HiBi) fiber loop mirror (FLM) concatenated with a long-period grating (LPG) written in a photonic crystal fiber (PCF) is proposed. Only HiBi-FLM acts as a sensor head, while the PCF-LPG serves as a temperature insensitive filter to provide wavelength dependent optical power transmission. A bandpass filter is used to provide a narrow band light source, thus only one of transmission peaks of the HiBi-FLM is located within a negative linear region of the LPG's transmission spectrum. By utilizing the stable filtering function of the PCF-LPG, the resonant wavelength variation of the FLM with temperature is transferred effectively to the intensity variation of the output light. The temperature applied on the FLM is deduced by a cheap optical power. As a result, the sensitivity of the sensor is about -0.4872 dB/°C. When an optical power meter with the resolution of 0.01 dB, a temperature resolution of 0.02°C is achieved.
| Original language | English |
|---|---|
| Title of host publication | Earth and Space 2010 |
| Subtitle of host publication | Engineering, Science, Construction, and Operations in Challenging Environments - Proceedings of the 12th International Conference |
| Pages | 1546-1550 |
| Number of pages | 5 |
| DOIs | |
| Publication status | Published - 29 Nov 2010 |
| Event | 12th International Conference on Engineering, Science, Construction, and Operations in Challenging Environments - Earth and Space 2010 - Honolulu, HI, United States Duration: 14 Mar 2010 → 17 Mar 2010 |
Conference
| Conference | 12th International Conference on Engineering, Science, Construction, and Operations in Challenging Environments - Earth and Space 2010 |
|---|---|
| Country/Territory | United States |
| City | Honolulu, HI |
| Period | 14/03/10 → 17/03/10 |
Keywords
- Fibers
- Mirrors
- Probe instruments
- Temperature effects
ASJC Scopus subject areas
- Building and Construction
- Environmental Engineering