4-nm continuous rapid sweeping spectroscopy in 2-μm band using distributed Bragg reflector laser
| Autor: | Takuya Kanai, Shimokozono Makoto, Masashi Abe, Hiroyuki Ishii, Mikitaka Itoh, H. Mastuzaki, Ryoichi Kasahara, Yoshitaka Ohiso, Naoki Fujiwara |
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| Rok vydání: | 2017 |
| Předmět: |
Quantum optics
Horizontal scan rate Materials science Physics and Astronomy (miscellaneous) business.industry General Engineering General Physics and Astronomy 02 engineering and technology Laser Distributed Bragg reflector law.invention Wavelength 020210 optoelectronics & photonics Optics Path length Distributed Bragg reflector laser law 0202 electrical engineering electronic engineering information engineering Spectroscopy business |
| Zdroj: | Applied Physics B. 123 |
| ISSN: | 1432-0649 0946-2171 |
| Popis: | We apply a newly developed 2-μm distributed Bragg reflector (DBR) laser to CO2 spectroscopy. We achieve mode-hop free wavelength tuning over 4 nm by sweeping the DBR current and phase control current, simultaneously. The sensitivity of this laser spectroscopy system is better than 5 × 10−3, which is the noise level, and means that a CO2 concentration of 400 ppm can be detected with a path length of 1 m. We confirm that the DBR laser in the 2-μm region maintains a wide tunability of 4 nm even when rapidly swept at a scan rate of 10 kHz. |
| Databáze: | OpenAIRE |
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