Contents
Source: MDPI
Gaussian Pulses
Overview
Gaussian pulses are a common temporal shape of ultrashort pulses generated by mode-locked lasers. They are often described by a Gaussian function, with a peak power related to the pulse energy and duration.
Characteristics of Gaussian Pulses
Gaussian pulses typically have a symmetric shape with a bell curve profile. They are often transform-limited, meaning their spectral width is inversely related to their temporal duration.
Temporal Shape
The temporal shape of a Gaussian pulse is distinct, with a smooth rise to peak power and gradual decay. This shape is different from other pulse profiles like sech2 pulses.
Peak Power
The peak power of a Gaussian pulse is approximately 94% of the pulse energy divided by the full width at half-maximum (FWHM) pulse duration.
Applications
Gaussian pulses are commonly observed in actively mode-locked lasers due to the characteristics of the laser resonator. They can also be influenced by factors like chromatic dispersion and optical nonlinearities.
Distinction from Gaussian Beams
It’s important not to confuse Gaussian pulses with Gaussian beams. While Gaussian pulses have a Gaussian temporal profile, Gaussian beams exhibit a Gaussian spatial intensity distribution. However, it is possible to have both types simultaneously.
Conclusion
Gaussian pulses play a significant role in laser technology, particularly in mode-locked lasers. Understanding their temporal characteristics and peak power is essential for optimizing laser performance and applications.
Further Reading
For more in-depth information on Gaussian pulses and related topics, refer to resources on laser physics and ultrafast optics.
Source: Wikipedia
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