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Phase-conjugate fluorozirconate fiber laser operating at 800 nm
Optics Letters
|October 3, 2009
Summary
Researchers achieved self-sustaining laser action in a fluorozirconate optical fiber amplifier using phase-conjugate feedback. A photorefractive grating in BaTiO3 enabled laser operation, persisting even after the initial laser diode was removed.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Fluorozirconate optical fiber amplifiers are crucial for infrared applications.
- Achieving stable laser action often requires robust feedback mechanisms.
Purpose of the Study:
- To demonstrate phase-conjugate feedback for laser action in a fluorozirconate optical fiber amplifier.
- To investigate the self-sustaining nature of the feedback mechanism.
Main Methods:
- Utilized a semiconductor laser diode at 807 nm to write a grating in photorefractive Barium Titanate (BaTiO3).
- Configured the system in a ring configuration to provide feedback into the optical fiber amplifier.
- Observed laser action and the persistence of the grating after removing the initial laser diode.
Main Results:
- Successfully established phase-conjugate feedback into the optical fiber amplifier.
- Observed sustained laser action enabled by the self-sustaining photorefractive grating.
- Demonstrated that the laser action continues even without the continuous presence of the writing laser diode.
Conclusions:
- Phase-conjugate feedback using photorefractive BaTiO3 is an effective method for achieving laser action in fluorozirconate optical fiber amplifiers.
- The self-sustaining nature of the grating offers a stable and persistent feedback mechanism for laser operation.
- This technique holds potential for developing robust and efficient infrared fiber lasers.
