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Self-pulsed fiber Raman master oscillator power amplifiers.
Optics Express
|June 5, 2009
Summary
Self-pulsed operation was achieved in fiber Raman master oscillator power amplifiers using a single pump source. The pulse period depends on the amplifier
Area of Science:
- Optics and Photonics
- Laser Physics
- Nonlinear Optics
Background:
- Fiber Raman master oscillator power amplifiers (RMOPAs) are crucial for high-power fiber laser systems.
- Understanding their operational dynamics is essential for optimizing performance and stability.
Purpose of the Study:
- To investigate and report the self-pulsed operation of fiber Raman master oscillator power amplifiers.
- To analyze the factors influencing the pulse period in such systems.
Main Methods:
- Utilizing a single pump source to successively power both the oscillator and amplifier stages.
- Observing and measuring the pulse period of the self-pulsed output.
- Developing a simple theoretical model to qualitatively explain the observed phenomena.
Main Results:
- Demonstrated stable self-pulsed operation in fiber RMOPAs.
- Identified that the pulse period is either one or half the round-trip time of the oscillator.
- Correlated the pulse period with the optical length of the amplifier.
Conclusions:
- Self-pulsed operation in fiber RMOPAs can be achieved with a single pump source.
- The optical length of the amplifier plays a critical role in determining the pulse repetition rate.
- A basic model can qualitatively explain the observed self-pulsing behavior.
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