Browsing by Author "İlday, F. Ömer"
Now showing items 1-20 of 54
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1.7-GHz intra-burst repetition rate Yb-fiber amplifier system
(IEEE, 2015)Material processing efficiency of ultrafast pulses increases dramatically with repetition rate of the pulses, if the conditions are adjusted correctly to avoid excessive plasma and particulate shielding. However, given ... -
10 μJ 150 fs all-fiber Yb laser amplifier system
(IEEE, 2015)Femtosecond laser pulse sources have become increasingly popular in the last decade as a result of their practical features, such as insensitivity to environmental variations, versatile designs, high-power outputs. However, ... -
83 W, 1 ns, 3.1 MHz all-fiber laser for micromachining
(IEEE, 2011)Fiber lasers are commonly used for various material processing applications. The advantages (such as simplicity of the system, high material removal rate) and disadvantages (larger heat-affected zone, reduced precision) ... -
83 W, 3.1 MHz, square-shaped, 1 ns-pulsed all-fiber-integrated laser for micromachining
(Optical Society of America, 2011-08-29)We demonstrate an all-fiber-integrated laser based on off-the-shelf components producing square-shaped, 1 ns-long pulses at 1.03 mu m wavelength with 3.1 MHz repetition rate and 83 W of average power. The master-oscillator ... -
All-fiber all-normal dispersion laser with an in-fiber Lyot filter
(Optical Society of America, 2010)We propose use of a short PM-fiber section as birefringent medium to construct an all-fiber Lyot filter, with bandwidth adjustable through the PM-fiber length. An all-fiber all-normaldispersion laser is demonstrated using ... -
All-fiber burst mode femtosecond laser system integrated with OCT for cataract surgery
(IEEE, 2015)Cataract condition is responsible for two thirds of preventable visual impairments afflicting nearly 190 million all over the world [1]. Every year, 19 million cataract surgeries are performed worldwide [2]. Femtosecond ... -
All-fiber high-energy yb-doped fiber amplifier
(IEEE, 2009)We report a robust, all-fiber amplifier seeded by a fiber oscillator. Seed pulses at 1 MHz repetition rate are amplified up to 3 μJ, delivering 1 μJ-energy, 170 fs-long pulses. Duration reduces to 120 fs at 1 μJ amplifier ... -
All-fiber Yb-doped laser mode-locked by nanotubes
(IEEE, 2013)Single-wall carbon nanotubes (SWNTs) and graphene have emerged as promising saturable absorbers (SAs), due to their broad operation bandwidth and fast recovery times [1-3]. However, Yb-doped fiber lasers mode-locked using ... -
All-normal-dispersion fiber lasers for frequency metrology
(Optical Society of America, 2011)Development of an all-normal-dispersion Yb-doped fiber laser-based frequency comb is reported. Repetition-frequency stabilization to the cesium standard, amplitude and phase noise measurements indicate low-noise performance. ... -
Applying the principle of orthogonality of high dimensional random vectors to obtain high-density, large-volume 3D holographic display
(OSA, 2018)The efforts toward truly 3D displays are far from exploiting the full potential of holography. Here, we apply the principle of orthogonality of high dimensional random vectors to obtain unprecedented dense, large volume holograms. -
Balancing gain narrowing with self phase modulation: 100-fs, 800-nJ from an all-fiber-integrated Yb amplifier
(IEEE, 2013)There is much progress in Yb-fiber oscillator-amplifier systems, which enable generation of high-repetition-rate, microjoule energies and sub-picosecond pulse widths [1,2]. Given the extremely large total gain factors to ... -
Breaking crosstalk limits to dynamic holography using orthogonality of high-dimensional random vectors
(Nature Publishing Group, 2019)Holography is the most promising route to true-to-life three-dimensional (3D) projections, but the incorporation of complex images with full depth control remains elusive. Digitally synthesized holograms1,2,3,4,5,6,7, which ... -
Burst-mode Yb fiber amplifier producing 30 μJ individual pulse energy
(Optical Society of America, 2012)We report 30-μJ individual pulse energy for 150-ns long amplified bursts of 0.4 mJ total energy from a 1-kHz Yb-fiber amplifier. Non-uniformity of pulse energy distribution inside amplified bursts is significantly reduced. ... -
Characterization of coupling of pump fluctuations to laser in mode-locked Yb-doped and Er-doped fiber oscillators
(Optical Society of America, 2010)Transfer of fluctuations of pump power to laser power is characterized for mode-locked fiber oscillators. Contribution of pump noise to laser noise is estimated. Limits to pump modulation bandwidth for carrier-envelopephase ... -
Controlling laser-induced self-organized patterns via engineered defects
(IEEE, 2015)Nanoscale periodic surface structures are of paramount importance in material science [1]. The recently demonstrated Nonlinear Laser Lithography (NLL) technique allows creating nanostructure arrays over indefinitely large ... -
Development and characterization of all-normal dispersion fiber laser for frequency comb generation
(Optical Society of America, 2011)Development of an all-normal-dispersion Yb-doped fiber laser-based frequency comb is reported. Repetition-frequency stabilization to the cesium standard, amplitude and phase noise measurements indicate low-noise performance. ... -
Direct laser writing of volume fresnel zone plates in silicon
(IEEE, 2015)Functional optical elements fabricated on silicon (Si) constitute fundamental building blocks of Si photonics [1]. For the fabrication of these elements, conventional lithography and etching techniques are used. In spite ... -
Discrete similariton regime for energy scaling of modelocked thin-disk lasers
(OSA, 2018)We investigate energy scaling of modelocked thin-disk lasers via modelocking regimes which are more tolerant in terms of maximum nonlinearity than soliton modelocking. Our numerical results show promise for mJ-level pulse ... -
Dissipative solitons generated from a mode-locked Raman laser
(IEEE, 2015)Stolen, et al. introduced synchronously pumped oscillators where gain was achieved through stimulated Raman scattering (SRS) as a method to reach wavelengths outside of the limited range covered by laser gain media [1]. ... -
Femtosecond laser-induced TiO2 nano structures on titanium
(Optical Society of America, 2010)We report formation of polarization-dependent nanostructures (nanolines, nanocircles) by high repetition-rate femtosecond laser pulses on titanium surface through a novel mechanism, converting Ti to TiO2. Arbitrarily ...
