Wang Guangyu, Hong Yanji, Pan Hu, Song Junling. Validation of temperature measurement for a tunable diode laser absorption sensor[J]. Infrared and Laser Engineering, 2013, 42(9): 2358-2363.
| Citation:
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Wang Guangyu, Hong Yanji, Pan Hu, Song Junling. Validation of temperature measurement for a tunable diode laser absorption sensor[J]. Infrared and Laser Engineering, 2013, 42(9): 2358-2363.
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Validation of temperature measurement for a tunable diode laser absorption sensor
- Received Date: 2013-01-11
- Rev Recd Date:
2013-02-17
- Publish Date:
2013-09-25
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Abstract
A tunable diode laser absorption sensor was developed to measure gas temperature, which exploited scanned-wavelength direct absorption spectroscopy and fixed-wavelength modulation spectroscopy with second harmonic detection on two water vapour spectral features near 7 454.4 cm-1 and 7 185.6 cm-1. The sensor was capable of making absolute measurement and could reach 10 kHz output bandwidth using fixed-wavelength modulation spectroscopy. Its performance and accuracy were validated and demonstrated in a static cell with known temperature and pressure. The measured temperature using two techniques agree to within 2% RMS of thermocouple reading for temperature from 600 to 1 000 K, which indicates the sensor is capable of making rapid and highly accurate temperature measurement for uniform flow.
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