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All-Fiber Mode-Locked Ultrafast Thulium-Doped Fiber Lasers at 2um

Wang, QingQing (2014) All-Fiber Mode-Locked Ultrafast Thulium-Doped Fiber Lasers at 2um. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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In this work, we demonstrate three original all-fiber ring configurations of passively modelocked Thulium-doped fiber(TDF) lasers operated around 2μm wavelength for which the usage of free-space optics components is minimized. Different mode-locking techniques/materials e.g. nonlinear polarization evolution (NPE), graphene-based saturable asbsorbers(GSAs) and single-wall carbon nanotubes (SWCNTs) are developed and used to passively mode lock TDF laser and produce ultrashort pulses at 2μm. Also to achieve higher pulse energy directly from a fiber oscillator, the net intra-cavity dispersion is managed by the introducing of normal dispersion fiber(NDF) at 2μm into the fiber cavity. Both the sign and amount of the net cavity dispersion can be controlled without compromising the merits of all-fiber configuration. Distinctive ultrashort pulses of different pulse shapes and per-pulse energies e.g. solitons, noise-like pulses and dissipative solitons are produced from these fiber lasers for which the generated pulses’ features and dynamics are experimentally investigated and characterized. A computational model is built to simulate these mode-locked TDF lasers by numerically solving the Nonlinear Schr˝odinger Equations(NLSE).


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Wang, QingQingQIW14@PITT.EDUQIW14
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairChen, Kevinpec9@pitt.eduPEC9
Committee MemberEl Nokali, Mahmoudmen@pitt.eduMEN
Committee MemberStanchina, Williamwes25@pitt.eduWES25
Committee MemberLi, Guangyonggul6@pitt.eduGUL6
Committee MemberHarris,
Date: 19 September 2014
Date Type: Publication
Defense Date: 16 July 2014
Approval Date: 19 September 2014
Submission Date: 23 July 2014
Access Restriction: 3 year -- Restrict access to University of Pittsburgh for a period of 3 years.
Number of Pages: 124
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Electrical Engineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Fiber, Laser, Mode-lock, Thulium
Date Deposited: 19 Sep 2014 19:08
Last Modified: 19 Sep 2017 05:15


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