Spectral filtering for mode locking in the normal dispersive regime

A theoretical model that characterizes the physical process responsible for generating ultrashort, high-energy, mode-locked pulses in a normal-dispersion laser cavity with strong spectral filtering is developed. According to this model, two of the critical physical parameters used to achieve optimal...

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Bibliographic Details
Published in:Optics letters 2008-05, Vol.33 (9), p.941-943
Main Authors: BALE, Brandon G, KUTZ, J. Nathan, CHONG, Andy, RENNINGER, William H, WISE, Frank W
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Laser optical systems: design and operation
Modulation, tuning, and mode locking
Nonlinear optics
Optics
Physics
Ultrafast processes
optical pulse generation and pulse compression
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Summary:A theoretical model that characterizes the physical process responsible for generating ultrashort, high-energy, mode-locked pulses in a normal-dispersion laser cavity with strong spectral filtering is developed. According to this model, two of the critical physical parameters used to achieve optimal performance are the ratio of the filter bandwidth to the gain bandwidth and the placement of the output coupler in the laser cavity. The spectral filtering plays a crucial role in maintaining a short pulse duration with high energy. This phenomenon is generic to mode locking with normal dispersion.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.33.000941