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Adaptive pulse shape control in a diode-seeded nanosecond fiber MOPA system
Optics Express
|June 17, 2009
Summary
We actively shape electrical pulses to precisely control laser output. This method compensates for amplifier effects and enables customized pulse shapes, like squares, for higher energy extraction and efficient frequency conversion.
Area of Science:
- Fiber laser technology
- Nonlinear optics
- Pulse shaping
Background:
- Gain saturation in Ytterbium (Yb) doped fiber amplifiers alters laser pulse shapes.
- Existing methods struggle to precisely control output pulse characteristics.
Purpose of the Study:
- To actively shape driving electrical pulses for precise control of laser diode output.
- To compensate for pulse shaping effects caused by gain saturation in Yb-doped fiber amplifiers.
- To generate user-defined, customized output pulse shapes, including square pulses.
Main Methods:
- Active electrical pulse shaping applied to a laser diode driver.
- Utilizing an Ytterbium (Yb) doped fiber amplifier cascade.
- Characterization of output pulse shapes and energy extraction.
Main Results:
- Demonstrated compensation for gain saturation-induced pulse distortion.
- Successfully generated customized output pulse shapes, including square pulses.
- Identified potential for increased extractable pulse energy and high-efficiency frequency conversion.
Conclusions:
- Active electrical pulse shaping is a viable method for controlling laser diode output.
- Customized pulse shapes, particularly square pulses, offer advantages for energy scaling and nonlinear processes.
- This technique enhances the flexibility and performance of fiber laser systems.
