Continuously tunable external-cavity diode laser with a double-grating arrangement
| Autor: | Andreas Tünnermann, M. Laschek, Dieter Wandt, Herbert Welling |
|---|---|
| Přispěvatelé: | Publica |
| Rok vydání: | 1997 |
| Předmět: |
Distributed feedback laser
Tunable diode laser absorption spectroscopy Materials science Dye laser business.industry Far-infrared laser Laser Atomic and Molecular Physics and Optics Vertical-cavity surface-emitting laser law.invention Optics law Optoelectronics Laser power scaling business Tunable laser |
| Zdroj: | Optics letters. 22(6) |
| ISSN: | 0146-9592 |
| Popis: | A new external-cavity diode laser system based on an extended version of the Littman configuration is investigated. In our laser system the tuning mirror is replaced with a second grating mounted at the Littrow angle. This double-grating design provides a smaller passive bandwidth than the grating-mirror configuration, which is used to compensate for the large angle-of-incidence-dependent losses of the grazing-incidence grating. This results in a broader continuous tuning range with an improved mode stability. Because two laser diodes, emitting at 820 and 775 nm, respectively, are used, the external-cavity laser is continuously tunable without mode hops across 35 nm at 820 nm and 27 nm at 775 nm. Such a laser was used to measure the absorption lines of the oxygen A band around 762 nm. The complete R - and P -rotational branches of the b summation operator(g)(1) (+)(nu(??)=0)?X (3) summation operator(g)(-)(nu (?)=0) transition were recorded in a single-wavelength scan. |
| Databáze: | OpenAIRE |
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