Compact ultrashort pulse diode pumped vertical cavity surface emitting laser
Compact ultrashort pulse diode pumped vertical cavity surface emitting laser
This work describes direct and indirect multilayer design methods and their successful applications to the design of DP-VECSELs and saturable absorber mirrors. Two specific indirect design algorithms were used to enhance such device performance. In general indirect design methods are very helpful if one wants to achieve particular results and there is still a lot of freedom and work that can be done for specific algorithm development.
A novel superlattice-based design of saturable absorber mirror (SUSAM) is introduced for the first time. It is shown that an additional strained superlattice can be used to shorten absorption recovery characteristics without increasing significantly non-saturable losses (<0.3%). A SUSAM has been successfully used to mode lock a DP-VECSEL at 1034 nm, generating 5-ps long (FWHM) pulses at a repetition rate of 330 MHz with average power of up to 45 mW in a circular diffraction-limited beam. Only single-step standard MOCVD growth is needed to manufacture SUSAMs. Three types of SUSAM are discussed. A few particular designs seem to be very promising for the high volume production.
The experimental part of the thesis can be divided into two parts which describe sample characterization, and the use of structures for CW and CW-mode-locking laser regimes. Characterization of the grown samples involves reflection or transmission measurement, photoluminescence measurement, pump-probe experiments and the CW and mode-locking results. Some experiments have been done to study global instabilities that seem to be an interesting problem in mode-locking. The whole thesis concludes with a summary, and some promising ideas for future improvements for next generation lasers and laser-based devices.
University of Southampton
Vys̆niauskas, Ke̜stutis
0419a9ad-02c8-40da-be32-62bfcbe7e3ad
2003
Vys̆niauskas, Ke̜stutis
0419a9ad-02c8-40da-be32-62bfcbe7e3ad
Vys̆niauskas, Ke̜stutis
(2003)
Compact ultrashort pulse diode pumped vertical cavity surface emitting laser.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
This work describes direct and indirect multilayer design methods and their successful applications to the design of DP-VECSELs and saturable absorber mirrors. Two specific indirect design algorithms were used to enhance such device performance. In general indirect design methods are very helpful if one wants to achieve particular results and there is still a lot of freedom and work that can be done for specific algorithm development.
A novel superlattice-based design of saturable absorber mirror (SUSAM) is introduced for the first time. It is shown that an additional strained superlattice can be used to shorten absorption recovery characteristics without increasing significantly non-saturable losses (<0.3%). A SUSAM has been successfully used to mode lock a DP-VECSEL at 1034 nm, generating 5-ps long (FWHM) pulses at a repetition rate of 330 MHz with average power of up to 45 mW in a circular diffraction-limited beam. Only single-step standard MOCVD growth is needed to manufacture SUSAMs. Three types of SUSAM are discussed. A few particular designs seem to be very promising for the high volume production.
The experimental part of the thesis can be divided into two parts which describe sample characterization, and the use of structures for CW and CW-mode-locking laser regimes. Characterization of the grown samples involves reflection or transmission measurement, photoluminescence measurement, pump-probe experiments and the CW and mode-locking results. Some experiments have been done to study global instabilities that seem to be an interesting problem in mode-locking. The whole thesis concludes with a summary, and some promising ideas for future improvements for next generation lasers and laser-based devices.
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Published date: 2003
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Local EPrints ID: 465033
URI: http://eprints.soton.ac.uk/id/eprint/465033
PURE UUID: 8bc5f866-200a-4777-9b9d-d864867301a0
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Date deposited: 05 Jul 2022 00:18
Last modified: 16 Mar 2024 19:54
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Author:
Ke̜stutis Vys̆niauskas
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