High-power broadly tunable grating-coupled external cavity laser in green region
| Autor: | Xueqin Lv, Binbin Xu, Wenlong Lv, Yan Zhang, Ding Ding, Jiang-Yong Zhang |
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| Rok vydání: | 2019 |
| Předmět: |
Diffraction
Materials science business.industry Second-harmonic generation 02 engineering and technology Grating Laser Diffraction efficiency 01 natural sciences law.invention Semiconductor laser theory 010309 optics Laser linewidth 020210 optoelectronics & photonics law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Optoelectronics business Instrumentation Diffraction grating |
| Zdroj: | The Review of scientific instruments. 89(12) |
| ISSN: | 1089-7623 |
| Popis: | A broadly tunable grating-coupled external cavity laser system in the green region is demonstrated by employing a commercially available broad-area green laser diode. A simple Littrow-type external cavity configuration was adopted, and two gratings with different diffraction efficiencies were used as the light feedback elements. When a grating with the first-order diffraction efficiency of 50% and the zeroth-order diffraction efficiency of 31% was used, a tuning bandwidth of 11.0 nm with an output power near 400 mW was achieved. When a grating with the first-order diffraction efficiency of 10% and the zeroth-order diffraction efficiency of 78% was used, a tuning bandwidth of 5.0 nm with an output power near 750 mW was achieved. Meanwhile, the spectral linewidth was narrowed significantly down to 0.08-0.18 nm from the free-running linewidth of 2.81 nm due to the external mode selection effect. Such high-power broadly tunable green EC lasers are important for second harmonic generation. |
| Databáze: | OpenAIRE |
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