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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
Published on: April 4, 2016
Sidearm stimulated scattering phase-conjugated laser resonator.
S Chandra1, R C Fukuda, R Utano
1Science Applications International Corporation, 1710 Goodridge Drive, McLean, Virgina 22102, USA.
Optics Letters
|September 3, 2009
Summary
Researchers developed a new self-Q-switched phase-conjugated laser resonator. This novel design achieved 200 mJ energy output using cyclohexane as the stimulated scattering medium.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Conventional laser resonators often face limitations in energy output and pulse control.
- Phase-conjugate mirrors offer unique properties for laser beam manipulation and resonator design.
Purpose of the Study:
- To demonstrate a novel self-Q-switched phase-conjugated laser resonator.
- To investigate the performance of this resonator with different stimulated scattering media.
- To explore the underlying mechanisms of resonator operation.
Main Methods:
- A self-Q-switched phase-conjugated laser resonator was designed and constructed.
- A stimulated scattering (SS) phase-conjugate mirror was integrated into a sidearm external to the main cavity.
- Cyclohexane and carbon disulfide were employed as SS media to evaluate energy output.
Main Results:
- A Q-switched energy output of 200 mJ was achieved using cyclohexane as the SS medium.
- Energy output decreased by 20-40% when carbon disulfide was used.
- Observed periodic substructure in the Q-switched pulse envelope.
Conclusions:
- The novel self-Q-switched phase-conjugated laser resonator is a viable design for high-energy pulsed lasers.
- Cyclohexane is an effective SS medium for this resonator, yielding higher energy output compared to carbon disulfide.
- Regenerative amplification or mode-beating mechanisms likely explain the observed pulse substructure, indicating potential for further optimization.
