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DEVELOPMENT OF COMPACT LASERS FOR LASER REMOTE SENSING APPLCATIONS

Li, Shuo (2018) DEVELOPMENT OF COMPACT LASERS FOR LASER REMOTE SENSING APPLCATIONS. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Abstract

Laser-induced breakdown spectroscopy (LIBS) is a powerful laser sensing technique for determination of elemental compositions that has been widely used in laboratories. There is increasing focus on the development of portable LIBS instruments for use in the field as stand-off sensing tools for harsh or dangerous environments. In this dissertation, we focus on developing compact lasers for such applications, using both conventional and advanced manufacturing method.
We first demonstrate the development of a compact actively Q-switched laser, followed by the development of a double-pulse laser based on the same optical design. Several LIBS experiments are successfully performed using these two lasers. We also investigate the advantages of using double-pulse LIBS during the early plasma stage. Significantly signal improvement has been observed. We also demonstrate selective signal enhancement which is usually achieved by using bulky and expensive high power tunable laser in the lab. The low-cost instrument and innovative technology we demonstrated here make it possible to extend such improvement to field-portable LIBS applications.
Next, we introduce the development of a compact unibody laser enabled by addictive manufacturing and its advantages compared with laser made by conventional method. We also explore the 3D printing of advanced diamond/metal composites with cellar structure. The technology exploits the flexibility of the bottom-up manufacturing schemes to produce entire laser photonic systems made of flexure, cellular structures with embedded cooling and sensing functions, as well as using advanced diamond/copper composites. The innovation in manufacturing digitization and utilization of new materials and structures will allow rapid design modification and radical design innovation in developing laser and photonic systems for wider deployments on mobile drone platforms for a wide array of industrial, consumer, environmental, and military applications.


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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Li, Shuoshl67@pitt.edushl67
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Thesis Advisorchen, kevinpec9@pitt.edu
Committee MemberTo, Albert Chi Fualbertto@pitt.edu
Committee MemberLi, Guangyonggul6@pitt.edu
Committee MemberMao, Zhihongzhm4@pitt.edu
Committee MemberTan, Sushengsut6@pitt.edu
Date: 10 March 2018
Defense Date: July 2018
Approval Date: 7 November 2018
Submission Date: 6 June 2018
Access Restriction: 2 year -- Restrict access to University of Pittsburgh for a period of 2 years.
Number of Pages: 123
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Electrical and Computer Engineering
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Laser-induced breakdown spectroscopy,laser
Date Deposited: 07 Nov 2019 06:00
Last Modified: 07 Nov 2019 06:00
URI: http://d-scholarship.pitt.edu/id/eprint/34606

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