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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
Published on: April 24, 2014
Mode stability of external cavity diode lasers
Sebastian D Saliba1, Mark Junker, Lincoln D Turner
1ARC Centre of Excellence for Coherent X-Ray Science, School of Physics,The University of Melbourne, Victoria 3010, Australia.
Applied Optics
|December 17, 2009
Summary
Optimizing external cavity diode laser (ECDL) performance involves adjusting cavity length and grating position. Mechanically simple ECDLs can achieve a 35 GHz mode-hop-free tuning range at 780 nm.
Area of Science:
- Laser Physics
- Optical Engineering
- Semiconductor Lasers
Background:
- Mode stability is crucial for external cavity diode lasers (ECDLs).
- Optimizing the mode-hop-free tuning range of grating-feedback ECDLs is typically achieved by rotating the grating around a specific pivot.
- Conveniently adjusting ECDL parameters is desirable for practical applications.
Purpose of the Study:
- To investigate alternative methods for optimizing the mode-hop-free tuning range of grating-feedback ECDLs.
- To evaluate the impact of cavity length and grating location on mode stability.
- To assess the relative importance of temperature stability in the diode and external cavity.
Main Methods:
- Investigated the effects of varying cavity length and grating position on laser performance.
- Analyzed the mode-hop-free tuning range under different ECDL configurations.
- Evaluated the influence of temperature fluctuations on laser stability.
Main Results:
- Achieved optimal mode-hop-free tuning ranges with adjusted cavity length and grating location, similar to specialized pivot methods.
- Demonstrated that mechanically simple ECDL designs can yield significant mode-hop-free tuning.
- Quantified the 35 GHz mode-hop-free tuning range at 780 nm using standard components.
Conclusions:
- Optimizing ECDL mode stability is achievable through strategic adjustments of cavity length and grating location, even at non-ideal pivot points.
- Mechanically uncomplicated ECDL designs can attain substantial mode-hop-free tuning ranges.
- The study confirms the feasibility of achieving a 35 GHz mode-hop-free tuning range at 780 nm with readily available components.
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