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Fast pulse train control using filled-aperture coherent beam combining for high-average-power laser systems.
Optics Letters
|November 16, 2019
Summary
This study introduces fast pulse switching using a coherent polarization beam combiner and phase difference detection (PDD) algorithm. This method enables stable burst-mode extraction for high-power pulsed laser systems.
Area of Science:
- Optics and Photonics
- Laser Physics
- Materials Science
Background:
- High-speed switching is crucial for advanced pulsed laser systems.
- Existing methods face limitations in stability and duty cycle control.
- Pulsed Yb-doped fiber lasers offer unique properties for scientific applications.
Purpose of the Study:
- To demonstrate fast pulse train switching in pulsed laser systems.
- To achieve stable burst-mode extraction with arbitrary duty cycles.
- To utilize a coherent polarization beam combiner with a phase difference detection (PDD) algorithm.
Main Methods:
- Employed a coherent polarization beam combiner.
- Implemented a phase difference detection (PDD) algorithm for feedback control.
- Utilized a 5 MHz pulsed Yb-doped fiber laser generating third-harmonic light (347 nm).
Main Results:
- Achieved fast pulse train switching.
- Demonstrated stable burst-mode extraction with an arbitrary duty cycle.
- Obtained a high contrast ratio of 800:1 for the 347 nm light.
Conclusions:
- The PDD algorithm provides highly stable feedback control.
- The proposed method is effective for high-speed switching in high-average-power pulsed laser systems.
- This technique enhances the versatility of pulsed laser systems for demanding applications.
