Optical feedback in dfb quantum cascade laser for mid-infrared cavity ring-down spectroscopy
| Autor: | Masahito Yamanaka, Toshinari Oh-hara, Atsushi Sato, Noriyoshi Hayashi, Lei Jin, Tetsuo Iguchi, Volker Sonnenschein, Hideki Tomita, Shusuke Kato, Ryohei Terabayashi, Kenta Hashizume, Norihiko Nishizawa, Kohei Nozawa |
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| Rok vydání: | 2016 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Physics::Instrumentation and Detectors Physics::Optics 01 natural sciences Noise (electronics) Signal law.invention Cavity ring-down spectroscopy 010309 optics Finesse Laser linewidth Optics law 0103 physical sciences Physics::Atomic Physics Physical and Theoretical Chemistry Spectroscopy 010302 applied physics Distributed feedback laser business.industry Condensed Matter Physics Atomic and Molecular Physics and Optics Physics::Accelerator Physics Quantum cascade laser business |
| Zdroj: | Hyperfine Interactions. 238 |
| ISSN: | 1572-9540 0304-3843 |
| DOI: | 10.1007/s10751-016-1390-6 |
| Popis: | A simple external optical feedback system has been applied to a distributed feedback quantum cascade laser (DFB QCL) for cavity ring-down spectroscopy (CRDS) and a clear effect of feedback was observed. A long external feedback path length of up to 4m can decrease the QCL linewidth to around 50kHz, which is of the order of the transmission linewidth of our high finesse ring-down cavity. The power spectral density of the transmission signal from high finesse cavity reveals that the noise at frequencies above 20kHz is reduced dramatically. |
| Databáze: | OpenAIRE |
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