Design of a Littrow-type diode laser with independent control of cavity length and grating rotation
| Autor: | Carlo Sias, Elia Perego, Federico Berto, Lucia Duca |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Materials science
Physics - Instrumentation and Detectors Atomic Physics (physics.atom-ph) FOS: Physical sciences Physics::Optics 02 engineering and technology Grating Rotation 01 natural sciences law.invention Atomic physics Physics - Atomic Physics 010309 optics 020210 optoelectronics & photonics Optics law 0103 physical sciences laser Littrow 0202 electrical engineering electronic engineering information engineering ECDL Physics::Atomic Physics Diffraction grating Diode Laser diode business.industry Instrumentation and Detectors (physics.ins-det) Laser Atomic and Molecular Physics and Optics Condensed Matter - Other Condensed Matter Transducer business Free spectral range Other Condensed Matter (cond-mat.other) Optics (physics.optics) Physics - Optics |
| Popis: | We present a novel extended-cavity diode laser (ECDL) based on a modified Littrow configuration. The coarse wavelength adjustment via the rotation of a diffraction grating is decoupled from the fine tuning of the external cavity modes by positioning a piezo transducer behind the diode laser, making the laser robust against misalignment and hysteresis even with long external cavities. Two laser prototypes with external cavities of different lengths were tested with a 780 nm laser diode, and locked to an atomic reference. We observe a mode-hop-free frequency tunability broader than the free spectral range of the external cavity upon changes of its length. The design is well suited to atomic and molecular experiments demanding a high level of stability over time. 5 pages, 4 figures |
| Databáze: | OpenAIRE |
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