Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Development of a burst mode oscillator free femtosecond fiber laser
Download
10529027.pdf
Date
2023-1-25
Author
Kantoğlu, Hür Doğa
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
257
views
211
downloads
Cite This
Lasers with short pulse duration have a wide range of applications in industry and science, such as telecommunication, processing, imaging, and metrology. A conventional and well-known method for producing short pulses is mode locking. However, mode locking ultrashort lasers have a limitation on repetition rate because of the cavity length. Several techniques have been proposed to overcome this limitation, such as harmonic mode locking and adding a repetition rate multiplier into a system. Nevertheless, these methods increase system complexity and cost. High repetition rate ultrashort lasers are highly desired due to their promising capabilities in material processing as well as nonlinear optics and optical sampling. Usually adding a modulator into a high repetition rate source makes the laser operate on a burst mode regime with unique applications such as ablation cooled processing regime. In this study, a pulsed laser is created by combining two continuous-wave lasers and then the beat pulse is broadened by four-wave mixing. After the broadening, the beat pulse is compressed by the negative dispersion fiber. Our oscillator free laser system produces femtosecond pulses with picosecond pulse energy and tunable GHz intraburst repetition rate which is suitable for material processing.
Subject Keywords
Femtosecond laser
,
Burst mode laser
,
Four-wave mixing
URI
https://hdl.handle.net/11511/102538
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Development of a picosecond pulsed mode-locked fiber laser
Yağcı, Mahmut Emre; Altan, Hakan; Department of Physics (2013)
Fiber lasers represent the state-of-the-art in laser technology and hold great promise for a wide range of applications because they have a minimum of exposed optical interfaces, very high efficiency, and are capable of exceptional beam quality. In the near future, the most important markets such as micromachining, automotive, biomedical and military applications will begin to use this technology. The scope of this thesis is to design and develop a short picosecond pulsed fiber laser using rare-earth doped ...
An Automated calibration set up for laser beam positioning systems in visual inspection applications
Kiraz, Ercan; Dölen, Melik; Department of Mechanical Engineering (2013)
In this study, a calibration setup for laser beam positioning systems used in visual inspection applications in industry is designed and manufactured. The laser positioning systems generate movable parallel laser lines on the projection surface. There are several translational and angular error sources affecting the positioning accuracy of the laser lines on the projection surface. Especially, since the laser line positioning error caused by angular error sources increases with the distance between the lase...
Development of a pulsed fiber laser for ladar system
Dülgergil, Ebru; Altan, Hakan; Department of Physics (2012)
In recent years laser technology has increasingly developed with the use of fiber lasers and this has provided the possibility to implement different techniques in the defense industry. LADAR is at the forefront of these techniques. Fiber lasers constitute a perfect source for LADAR systems due to their excellent robustness, compact size and high-power generation capability. In this study we will explore the development of a pulsed fiber laser source for a LADAR system that can obtain high resolution 3D ima...
EXPLICIT EXPRESSION FOR GROWTH-RATES IN FREE-ELECTRON LASERS WITH HELICAL AND AXIAL MAGNETIC-FIELDS
DEMOKAN, O; KABAK, Y (1992-10-01)
The dispersion relations of transverse and longitudinal modes in a free-electron laser with helical and axial magnetic fields are derived exactly for the one-dimensional case. The modes with positive and negative helicity are distinguished clearly. An analytically solvable expression for the growth rate of the modes, in resonance with the beam, is obtained. The dependence of the growth rate on system parameters is studied for broad ranges of values and comments on optimization are made.
Development of algorithms and software for forecasting, nowcasting and variability of TEC
Tulunay, E; Senalp, ET; Cander, LR; Tulunay, YK; Bilge, AH; Mizrahi, E; Kouris, SS; Jakowski, N (2004-01-01)
Total Electron Content (TEC) is an important characteristic of the ionosphere relevant to communications. Unpredictable variability of the ionospheric parameters due to various disturbances limits the efficiencies of communications, radar and navigation systems. Therefore forecasting and nowcasting of TEC are important in the planning and operation of Earth-space and satellite-to-satellite communication systems. Near-Earth space processes are complex being highly nonlinear and time varying with random varia...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
H. D. Kantoğlu, “Development of a burst mode oscillator free femtosecond fiber laser,” M.S. - Master of Science, Middle East Technical University, 2023.