Dr. Iyad Dajani Profile

Dr. Iyad Dajani

Deceased at Air Force Research Lab

SPIE Involvement:

Author

Publications (39)

Proceedings Article | 11 April 2024 Presentation + Paper

Presentation + Paper

Beam-combinable high-power fiber laser sources for directed energy applications

Roger Holten, Angel Flores, Thomas Ehrenreich, Brian Anderson, Iyad Dajani

Proceedings Volume 12939, 129390E (2024) https://doi.org/10.1117/12.3013096

KEYWORDS: Polarization, Modulators, Diffractive optical elements, Fiber amplifiers, Beam path, Polarization control, Polarizers, Free space, Directed energy weapons, Control systems, Coherent beam combination, Phase modulation, Phase matching, Beam combiners

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Proceedings Article | 21 April 2017 Presentation

Presentation

Numerical investigations of self- and cross-phase modulation effects in high-power fiber amplifiers (Conference Presentation)

Mohammad Zunoubi, Brian Anderson, Shadi Naderi, Timothy Madden, Iyad Dajani

Proceedings Volume 10083, 100830S (2017) https://doi.org/10.1117/12.2255019

KEYWORDS: Airborne laser technology, Modulation, Fiber amplifiers, Optical amplifiers, Dispersion, Laser applications, Clocks, High power fiber lasers, Single mode fibers, High power fiber amplifiers

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Proceedings Article | 7 March 2017 Presentation + Paper

Presentation + Paper

SBS suppression and coherence properties of a flat top optical spectrum in a high power fiber amplifier

Brian Anderson, Rongqing Hui, Angel Flores, Iyad Dajani

Proceedings Volume 10083, 100830V (2017) https://doi.org/10.1117/12.2252380

KEYWORDS: Fiber amplifiers, Radio optics, Phase modulation, Optical filters, Coherence (optics), High power fiber amplifiers, Modulation, Visibility, Optical amplifiers, Heterodyning

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Proceedings Article | 22 February 2017 Paper

Paper

Power scaling of a hybrid microstructured Yb-doped fiber amplifier

Cody Mart, Benjamin Pulford, Benjamin Ward, Iyad Dajani, Thomas Ehrenreich, Brian Anderson, Khanh Kieu, Tony Sanchez

Proceedings Volume 10083, 100830X (2017) https://doi.org/10.1117/12.2249863

KEYWORDS: Fiber amplifiers, Photonic crystals, Silica, Scattering, Photonic crystal fibers, Amplifiers, Optical amplifiers, Ytterbium, Diagnostics, Polarization, Structured optical fibers, Cladding

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Proceedings Article | 22 February 2017 Presentation + Paper

Presentation + Paper

~1 kilowatt Ytterbium-doped all-solid photonic bandgap fiber laser

Fanting Kong, Guancheng Gu, Thomas Hawkins, Maxwell Jones, Joshua Parsons, Monica Kalichevsky-Dong, Benjamin Pulford, Iyad Dajani, Liang Dong

Proceedings Volume 10083, 1008311 (2017) https://doi.org/10.1117/12.2251261

KEYWORDS: Fiber lasers, Laser optics, Nonlinear optics, Optical fibers, Cladding, Ytterbium, Single mode fibers, High power fiber lasers, Semiconductor lasers, Laser applications, Chemical oxygen iodine lasers

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Proceedings Article | 13 January 2017 Paper

Paper

Laser simulation at the Air Force Research Laboratory

Jacob Grosek, Shadi Naderi, Benjamin Oliker, Ryan Lane, Iyad Dajani, Timothy Madden

Proceedings Volume 10254, 102540N (2017) https://doi.org/10.1117/12.2265048

KEYWORDS: Fiber amplifiers, Fiber lasers, Raman spectroscopy, Optical amplifiers, Optical simulations, Analytical research, High power lasers, Optical fibers, Nonlinear optics, Thulium

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SPIE Journal Paper | 2 September 2016 Open Access

Open Access

Multi-kilowatt diffractive coherent combining of pseudorandom-modulated fiber amplifiers

Angel Flores, Iyad Dajani, Roger Holten, Thomas Ehrenreich, Brian Anderson

OE, Vol. 55, Issue 09, 096101, (September 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.9.096101

KEYWORDS: Fiber amplifiers, Diffractive optical elements, Optical amplifiers, Polarization, Beam splitters, Phase modulation, High power fiber amplifiers, Modulation, Phase shift keying, Signal attenuation

Read Abstract +

Proceedings Article | 16 March 2016 Paper

Paper

Nanoparticle doping for improved Er-doped fiber lasers

Colin Baker, E. Joseph Friebele, Charles Askins, Michael Hunt, Barbara Marcheschi, Jake Fontana, John Peele, Woohong Kim, Jasbinder Sanghera, Jun Zhang, Radha Pattnaik, Larry Merkle, Mark Dubinskii, Youming Chen, Iyad Dajani, Cody Mart

Proceedings Volume 9728, 97280T (2016) https://doi.org/10.1117/12.2217905

KEYWORDS: Erbium, Doping, Fiber lasers, Aluminum, Nanoparticles, Ions, Absorption, Silica, Luminescence, Refractive index

Read Abstract +

Proceedings Article | 11 March 2016 Paper

Paper

Multi-kW coherent combining of fiber lasers seeded with pseudo random phase modulated light

Angel Flores, Thomas Ehrehreich, Roger Holten, Brian Anderson, Iyad Dajani

Proceedings Volume 9728, 97281Y (2016) https://doi.org/10.1117/12.2213423

KEYWORDS: Fiber amplifiers, Diffractive optical elements, Optical amplifiers, Modulation, Fiber lasers, Phase modulation, Dielectric polarization, Diffraction

Read Abstract +

Proceedings Article | 9 March 2016 Paper

Paper

Kilowatt-level narrow-linewidth monolithic fiber amplifier based on laser gain competition

Nader Naderi, Angel Flores, Brian Anderson, Iyad Dajani

Proceedings Volume 9728, 972804 (2016) https://doi.org/10.1117/12.2211815

KEYWORDS: Fiber amplifiers, Phase modulation, Fiber lasers, Scattering, Modulation, Phase shift keying, Clocks, Laser damage threshold, Amplifiers

Read Abstract +

Proceedings Article | 9 March 2016 Paper

Paper

Kilowatt high-efficiency narrow-linewidth monolithic fiber amplifier operating at 1034 nm

Nader Naderi, Angel Flores, Brian Anderson, Ken Rowland, Iyad Dajani

Proceedings Volume 9728, 972803 (2016) https://doi.org/10.1117/12.2211803

KEYWORDS: Fiber amplifiers, Optical amplifiers, Phase modulation, Clocks, Modulation, High power fiber amplifiers, Amplifiers, Oscillators, Linear filtering, Beam quality measurement

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Proceedings Article | 9 March 2016 Paper

Paper

Multi-kilowatt power scaling and coherent beam combining of narrow-linewidth fiber lasers

Iyad Dajani, Angel Flores, Roger Holten, Brian Anderson, Benjamin Pulford, Thomas Ehrenreich

Proceedings Volume 9728, 972801 (2016) https://doi.org/10.1117/12.2218216

KEYWORDS: Modulation, Amplifiers, Clocks, Ytterbium, Cladding

Read Abstract +

Proceedings Article | 20 March 2015 Paper

Paper

Beam combining and SBS suppression in white noise and pseudo-random modulated amplifiers

Brian Anderson, Angel Flores, Roger Holten, Thomas Ehrenreich, Iyad Dajani

Proceedings Volume 9344, 93441U (2015) https://doi.org/10.1117/12.2082713

KEYWORDS: Modulation, Fiber amplifiers, Phase modulation, Visibility, Phase shift keying, Optical amplifiers, Fiber lasers, Clocks, Binary data, Laser scattering

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Proceedings Article | 4 March 2015 Paper

Paper

Large mode area Yb-doped photonic bandgap fiber lasers

Liang Dong, Fanting Kong, Guancheng Gu, Thomas Hawkins, Joshua Parsons, Maxwell Jones, Christopher Dunn, Monica Kalichevsky-Dong, Kunimasa Saitoh, Benjamin Pulford, Iyad Dajani

Proceedings Volume 9344, 934402 (2015) https://doi.org/10.1117/12.2086827

KEYWORDS: Cladding, Fiber lasers, Silica, Fermium, Frequency modulation, Refractive index, Photonic crystal fibers, Photon polarization, Glasses, High power fiber lasers

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Proceedings Article | 4 March 2015 Paper

Paper

High-power narrow-linewidth large mode area photonic bandgap fiber amplifier

Benjamin Pulford, Iyad Dajani, Thomas Ehrenreich, Roger Holten, Christopher Vergien, Nader Naderi, Cody Mart, Guancheng Gu, Fanting Kong, Thomas Hawkins, Liang Dong

Proceedings Volume 9344, 934406 (2015) https://doi.org/10.1117/12.2082709

KEYWORDS: Fiber amplifiers, Fiber lasers, Amplifiers, Optical amplifiers, Oscillators, Acoustics, Laser applications, Modulation, Multimode fibers, Light scattering

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Proceedings Article | 4 March 2015 Paper

Paper

Theoretical treatment of modal instability in high-power cladding-pumped Raman amplifiers

Shadi Naderi, Iyad Dajani, Jacob Grosek, Timothy Madden

Proceedings Volume 9344, 93442X (2015) https://doi.org/10.1117/12.2083038

KEYWORDS: Raman spectroscopy, Radiofrequency ablation, Fiber amplifiers, Amplifiers, Cladding, Photons, Refractive index, Signal attenuation, Nonlinear optics, Silica

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Proceedings Article | 4 March 2015 Paper

Paper

Polarizing 50µm core Yb-doped photonic bandgap fiber

Fanting Kong, Guancheng Gu, Thomas Hawkins, Joshua Parsons, Maxwell Jones, Christopher Dunn, Monica Kalichevsky-Dong, Benjamin Pulford, Iyad Dajani, Kunimasa Saitoh, Stephen Palese, Eric Cheung, Liang Dong

Proceedings Volume 9344, 934403 (2015) https://doi.org/10.1117/12.2076605

KEYWORDS: Polarization, Photon polarization, Fiber lasers, Cladding, Birefringence, Structured optical fibers, Polarizers, Glasses, Optical fibers, Refractive index

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Proceedings Article | 7 March 2014 Paper

Paper

Single-frequency Yb-doped photonic crystal fiber amplifier with 800W output power

Craig Robin, Iyad Dajani, Bejamin Pulford, Christopher Vergien

Proceedings Volume 8961, 896103 (2014) https://doi.org/10.1117/12.2042873

KEYWORDS: Fiber amplifiers, Acoustics, Optical amplifiers, Fiber lasers, Photonic crystal fibers, Neodymium, Silica, Laser scattering, Scattering, Phase modulation

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Proceedings Article | 7 March 2014 Paper

Paper

Experimental study of SBS suppression via white noise phase modulation

Brian Anderson, Craig Robin, Angel Flores, Iyad Dajani

Proceedings Volume 8961, 89611W (2014) https://doi.org/10.1117/12.2043107

KEYWORDS: Phase modulation, Modulation, Fiber amplifiers, Fiber lasers, Optical amplifiers, Linear filtering, Laser scattering, High power fiber amplifiers, Optical fibers, Electro optical modeling

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Proceedings Article | 20 February 2014 Paper

Paper

Investigations of SBS and laser gain competition in high-power phase modulated fiber amplifiers

Angel Flores, Iyad Dajani, Dane Hult, Craig Robin

Proceedings Volume 8964, 89640R (2014) https://doi.org/10.1117/12.2044196

KEYWORDS: Fiber amplifiers, Modulation, Fiber lasers, Phase modulation, Phase shift keying, Optical amplifiers, Laser damage threshold, Ytterbium, Frequency combs, Light scattering

Read Abstract +

Proceedings Article | 20 February 2014 Paper

Paper

Theoretical analysis of effect of pump and signal wavelengths on modal instabilities in Yb-doped fiber amplifiers

Shadi Naderi, Iyad Dajani, Jacob Grosek, Timothy Madden, Thien-Nam Dinh

Proceedings Volume 8964, 89641W (2014) https://doi.org/10.1117/12.2044143

KEYWORDS: Fiber amplifiers, Optical amplifiers, Fiber lasers, Thermography, Absorption, Analytical research, Single mode fibers, Photonic crystal fibers, High power fiber amplifiers, Cladding

Read Abstract +

Proceedings Article | 22 March 2013 Paper

Paper

Numerical studies of modal instabilities in high-power fiber amplifiers

Shadi Naderi, Iyad Dajani, Timothy Madden, Bemjamin Ward, Craig Robin, Jake Grosek

Proceedings Volume 8601, 86013F (2013) https://doi.org/10.1117/12.2006571

KEYWORDS: Fiber amplifiers, Ytterbium, Thermal effects, Optical simulations, Optical amplifiers, Polarization, High power fiber amplifiers, Near field, Refraction, Absorption

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Proceedings Article | 22 March 2013 Paper

Paper

Pseudo-random binary sequency phase modulation in high power Yb-doped fiber amplifiers

Craig Robin, Iyad Dajani, Clint Zernigue, Angel Flores, Ben Pulford, Ann Lanari, Shadi Naderi

Proceedings Volume 8601, 86010Z (2013) https://doi.org/10.1117/12.2004486

KEYWORDS: Modulation, Fiber amplifiers, Phase modulation, Acoustics, Phase shift keying, Amplifiers, Phonons, Signal processing, Laser scattering, Fiber lasers

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Proceedings Article | 15 March 2013 Paper

Paper

Experimental and theoretical investigations of single-frequency Raman fiber amplifiers operating at 1178 nm

Iyad Dajani, Christopher Vergien, Benjamin Ward, Craig Robin, Shadi Naderi, Angel Flores, Jean-Claude Diels

Proceedings Volume 8604, 86040N (2013) https://doi.org/10.1117/12.2006946

KEYWORDS: Radiofrequency ablation, Raman spectroscopy, Fiber amplifiers, Wavelength division multiplexing, Phase modulation, Fiber lasers, Sodium, Second-harmonic generation, Amplifiers, Optical amplifiers

Read Abstract +

Proceedings Article | 22 May 2012 Paper

Paper

Experimental and theoretical studies of phase modulation in Yb-doped fiber amplifiers

Angel Flores, Chunte Lu, Craig Robin, Shadi Naderi, Christopher Vergien, Iyad Dajani

Proceedings Volume 8381, 83811B (2012) https://doi.org/10.1117/12.921704

KEYWORDS: Modulation, Phase modulation, Fiber amplifiers, Phase shift keying, Fermium, Frequency modulation, Acoustics, Fiber lasers, Phonons, Scattering

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Proceedings Article | 16 February 2012 Paper

Paper

Gain-tailored SBS suppressing photonic crystal fibers for high power applications

Craig Robin, Iyad Dajani, Clint Zeringue, Benjamin Ward, Ann Lanari

Proceedings Volume 8237, 82371D (2012) https://doi.org/10.1117/12.910324

KEYWORDS: Fiber amplifiers, Optical amplifiers, Acoustics, Photonic crystal fibers, Absorption, Phase modulation, Cladding, Amplifiers, Laser applications, Laser scattering

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Proceedings Article | 15 February 2012 Paper

Paper

Single frequency acoustically tailored Raman fiber amplifier

Christopher Vergien, Iyad Dajani, Craig Robin, Clint Zeringue, Keith Wyman

Proceedings Volume 8240, 82400M (2012) https://doi.org/10.1117/12.906527

KEYWORDS: Raman spectroscopy, Radiofrequency ablation, Fiber amplifiers, Optical amplifiers, Wavelength division multiplexing, Phase modulation, Connectors, Fiber lasers, Acoustics, Second-harmonic generation

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Proceedings Article | 25 May 2011 Paper

Paper

Co-pumped 130 W monolithic single frequency fiber amplifier with an optically induced thermal gradient

Clint Zeringue, Chris Vergien, Iyad Dajani

Proceedings Volume 8039, 80390I (2011) https://doi.org/10.1117/12.886154

KEYWORDS: Fiber amplifiers, Optical amplifiers, Acoustics, Amplifiers, Thermography, Phase modulation, Reflectivity, Fiber lasers, Scattering

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Proceedings Article | 22 February 2011 Paper

Paper

Analysis of single frequency Raman amplifier for guide star application

Iyad Dajani, Christopher Vergien, Clint Zeringue, Craig Robin

Proceedings Volume 7917, 79171W (2011) https://doi.org/10.1117/12.875857

KEYWORDS: Raman spectroscopy, Fiber amplifiers, Optical amplifiers, Amplifiers, Raman scattering, Fiber lasers, Stars, Semiconductor lasers, Scattering, Laser scattering

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Proceedings Article | 22 February 2011 Paper

Paper

Experimental studies of segmented acoustically tailored photonic crystal fiber amplifier with 494 W single-frequency output

Craig Robin, Iyad Dajani, Furqan Chiragh

Proceedings Volume 7914, 79140B (2011) https://doi.org/10.1117/12.876303

KEYWORDS: Acoustics, Amplifiers, Photonic crystal fibers, Cladding, Phase modulation, Fluorine, Image segmentation, Aluminum, Optical testing, Fiber amplifiers

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Proceedings Article | 11 February 2011 Paper

Paper

Suppression of stimulated Brillouin scattering in optical fibers through phase-modulation: a time dependent model

Clint Zeringue, Iyad Dajani, Gerald Moore

Proceedings Volume 7914, 791409 (2011) https://doi.org/10.1117/12.875482

KEYWORDS: Modulation, Optical fibers, Phase modulation, Phase shift keying, Fermium, Frequency modulation, Scattering, Phonons, Laser scattering, Fiber amplifiers

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Proceedings Article | 12 October 2010 Paper

Paper

A theoretical investigation of stimulated Brillouin scattering in phase-modulated fiber amplifiers

Clint Zeringue, Iyad Dajani

Proceedings Volume 7836, 78360O (2010) https://doi.org/10.1117/12.868228

KEYWORDS: Modulation, Phase modulation, Reflectivity, Phase shift keying, Scattering, Numerical integration, Frequency modulation, Fermium, Laser scattering, Fiber amplifiers

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Proceedings Article | 17 February 2010 Paper

Paper

Experimental and theoretical studies of single frequency PCF amplifier with output of 400 W

Craig Robin, Iyad Dajani, Christopher Vergien, Clint Zeringue, Thomas Shay

Proceedings Volume 7580, 75801I (2010) https://doi.org/10.1117/12.842566

KEYWORDS: Acoustics, Amplifiers, Fiber amplifiers, Optical amplifiers, Photonic crystal fibers, Reflectivity, Thermal modeling, Cladding, Polymers, Coating

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Proceedings Article | 17 February 2010 Paper

Paper

SBS suppression through seeding with narrow-linewidth and broadband signals: experimental results

Chunte Lu, Iyad Dajani, Clint Zeringue, Christopher Vergien, Leanne Henry, Ahmed Lobad, Thomas Shay

Proceedings Volume 7580, 75802L (2010) https://doi.org/10.1117/12.842279

KEYWORDS: Optical amplifiers, Fiber amplifiers, Amplifiers, Fiber lasers, Laser scattering, Light scattering, Scattering, Wavelength division multiplexing, Thermal effects, High power fiber amplifiers

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Proceedings Article | 22 April 2009 Paper

Paper

SBS mitigation with multi-tone amplification: a theoretical model

Clint Zeringue, Iyad Dajani, T. Justin Bronder, Thomas Shay, Craig Robin

Proceedings Volume 7131, 71310Y (2009) https://doi.org/10.1117/12.815358

KEYWORDS: Amplifiers, Fiber amplifiers, Four wave mixing, Complex systems, Differential equations, Optical amplifiers, Adaptive optics, Laser scattering, Scattering, Mathematical modeling

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Proceedings Article | 19 February 2009 Paper

Paper

Multi-tone approach to SBS mitigation in narrow linewidth high power fiber amplifiers

Clint Zeringue, Iyad Dajani, Chunte Lu, Christopher Vergien, Craig Robin

Proceedings Volume 7195, 71952I (2009) https://doi.org/10.1117/12.808054

KEYWORDS: Fiber lasers, Fiber amplifiers, Signal processing, Laser scattering, Acoustics, Acousto-optics, High power fiber amplifiers, Scattering, Laser damage threshold, Complex systems

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Proceedings Article | 22 February 2008 Paper

Paper

SBS mitigation with 'two-tone' amplification: a theoretical model

T. Bronder, T. Shay, I. Dajani, A. Gavrielides, C. Robin, C. Lu

Proceedings Volume 6873, 68731R (2008) https://doi.org/10.1117/12.774584

KEYWORDS: Fiber amplifiers, Optical simulations, Systems modeling, Acoustics, Mathematical modeling, Amplifiers, Refraction, Acousto-optics, Absorption, Solids

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Proceedings Article | 28 July 2000 Paper

Paper

Modeling and prototyping of polymer fiber-based chemical and biological agent sensors

Michael Hawks, Iyad Dajani, Carl Kutsche, Fassil Ghebremichael

Proceedings Volume 4036, (2000) https://doi.org/10.1117/12.394056

KEYWORDS: Luminescence, Sensors, Waveguides, Polymers, Prototyping, Beam propagation method, Biological weapons, Wave propagation, Molecules, Rhodamine

Read Abstract +

SPIE Journal Paper | 1 October 1998

All-optical programmable switch with XOR gate functions in a doped silica thin film

W. Roc White, Iyad Dajani, Andres Cifuentes

OE, Vol. 37, Issue 10, (October 1998) https://doi.org/10.1117/12.10.1117/1.601812

KEYWORDS: Switches, Waveguides, Silica, Thin films, Laser optics, Beam splitters, Physics, Signal to noise ratio, Computer programming, Signal generators

Showing 5 of 39 publications

Conference Committee Involvement (5)

Laser Technology for Defense and Security XII

19 April 2016 | Baltimore, MD, United States

Laser Technology for Defense and Security XI

21 April 2015 | Baltimore, MD, United States

Laser Technology for Defense and Security X

6 May 2014 | Baltimore, MD, United States

Laser Technology for Defense and Security IX

30 April 2013 | Baltimore, Maryland, United States

Laser Technology for Defense and Security VIII

23 April 2012 | Baltimore, Maryland, United States

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