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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
Published on: April 24, 2014
Stretching-tunable external-cavity laser locked by an elastic silicone grating
Optics Express
|June 17, 2009
Summary
We achieved stable single-mode diode laser operation at 760 nm using a novel elastic transmission grating. This method allows for wavelength tuning and improved side-mode suppression for laser applications.
Area of Science:
- Optics and Photonics
- Laser Physics
- Materials Science
Background:
- Diode lasers require precise wavelength control for various applications.
- Existing wavelength stabilization techniques can be complex or limited in tunability.
- Elastic diffraction gratings offer potential for integrated and tunable optical feedback.
Purpose of the Study:
- To demonstrate wavelength locking of a diode laser using an elastic transmission grating.
- To investigate the tunability and mode stability of the laser system.
- To develop a cost-effective and efficient method for laser wavelength control.
Main Methods:
- Fabrication of a transmission grating in polydimethylsiloxane (silicone elastomer) via molding.
- Coating the grating with Titanium (Ti) and Gold (Au) for enhanced diffraction efficiency.
- Implementing the grating in a Littrow configuration for diode laser feedback and wavelength locking.
Main Results:
- Achieved stable single longitudinal mode operation at 760 nm.
- Demonstrated a side-mode suppression ratio of 20 dB.
- Tuned the laser wavelength over several nanometers by stretching the elastic grating.
Conclusions:
- Elastic transmission gratings are effective for diode laser wavelength locking.
- The developed method provides a tunable and stable laser source.
- This technique offers a promising approach for compact and adaptable laser systems.
