Loading...
Characterization of transient behaviors in a colliding pulse mode-locked (CPM) laser
Yang, Wei
Yang, Wei
Abstract
A colliding pulse mode-locked (CPM) laser achieves sub-picosecond operation by synchronizing two counter-propagating pulse trains to form a standing wave in a thin absorber jet. When properly aligned, these lasers maintain mode-locking for more than 100 seconds (1010 pulses), but eventually cease mode-locking for short periods of time. This thesis examines the characteristics of these transient events, when CPM mode-locking ceases (dropout) and when it resumes (dropin). The dropout is an apparently rapid event, typically lasting no longer than 5 microseconds or less than 500 pulses. The dropin takes significantly longer time, often has structure, and has a clear power dependency. This thesis uses a variety of statistical methods to search for changes in the nonlinear dynamics prior to the apparent power output change of a dropout, but does not find consistent precursors. Moreover, this thesis uses a fluence mapping method to study ultrashort pulse generation process in a novel bistable medium model. The bistable medium model naturally incorporates various high order perturbations and provides a framework for dynamics study and pulse shape control in ultrafast lasers.
Description
Date
2004-01-01
Journal Title
Journal ISSN
Volume Title
Publisher
Collections
Download Dataset
Files
Loading...
3140212.pdf
Adobe PDF, 5.53 MB
Rights Holder
Usage License
Embargo
Research Projects
Organizational Units
Journal Issue
Keywords
Citation
Advisor
Department
Applied Science
DOI
https://dx.doi.org/doi:10.21220/s2-seye-r342