Imperial College London

ProfessorMichaelDamzen

Faculty of Natural SciencesDepartment of Physics

Professor of Experimental Laser Physics
 
 
 
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Contact

 

+44 (0)20 7594 7783m.damzen Website

 
 
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Location

 

610Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

362 results found

Sauder D, Minassian A, Damzen MJ, 2006, High efficiency laser operation of 2 at.% doped crystalline Nd: YAG in a bounce geometry, OPTICS EXPRESS, Vol: 14, Pages: 1079-1085, ISSN: 1094-4087

Journal article

Minassian A, Sauder D, Smith GR, Thompson BA, Damzen MJet al., 2005, Diode-pumped bounce geometry Nd:GdVO<inf>4</inf> master oscillator power amplifier with high beam quality, Pages: 277-279

A Nd:GdVO4 oscillator amplifier in bounce amplifier configuration with 104W CW output power in TEM00 mode is demonstrated. Acousto-optically Q-switched system produces 101W of ∼20ns pulses at 400kHz.

Conference paper

Omatsu T, Minassian A, Damzen MJ, 2005, 45W continuous-wave output from a highly Nd doped YAG ceramic laser with a bounce amplifier geometry, Pages: 267-268

Efficient CW operation of a laser diode transversely-pumped 2% Nd:YAG ceramic laser in a bounce geometry is presented. The maximum output power of 45W was obtained. The optical-optical efficiency was 28%.

Conference paper

Omatsu T, Ojima Y, Minassian A, Damzen MJet al., 2005, Power scaling of highly neodymium-doped YAG ceramic lasers with a bounce amplifier geometry, OPTICS EXPRESS, Vol: 13, Pages: 7011-7016, ISSN: 1094-4087

Journal article

Damzen MJ, Boyle A, Minassian A, 2005, Adaptive gain interferometry: a new mechanism for optical metrology with speckle beams, OPTICS LETTERS, Vol: 30, Pages: 2230-2232, ISSN: 0146-9592

Journal article

Omatsu T, Isogami T, Minassian A, Damzen MJet al., 2005, &gt;100 kHz Q-switched operation in transversely diode-pumped ceramic Nd<SUP>3+</SUP>:YAG laser in bounce geometry, OPTICS COMMUNICATIONS, Vol: 249, Pages: 531-537, ISSN: 0030-4018

Journal article

Minassian A, Thompson BA, Smith G, Damzen MJet al., 2005, High-power scaling (&gt;100 W) of a diode-pumped TEM<sub>00</sub> Nd:GdVo<sub>4</sub> laser system, IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, Vol: 11, Pages: 621-625, ISSN: 1077-260X

Journal article

Villafana ER, Kir'yanov AV, Minassian A, Damzen MJet al., 2005, Diode-side-pumped Nd:YVO<inf>4</inf> laser Q-switched with LiF:F <inf>2</inf><sup>-</sup> saturable absorber, Laser Physics, Vol: 15, Pages: 570-578, ISSN: 1054-660X

Passive Q-switching (PQS) of a diode-side-pumped Nd: YVO4 laser using a LiF: F2 crystal as a sat-urable absorber is reported. Using the grazing-incidence cavity geometry, we obtain trains of giant pulses of duration as short as ∼10 ns and peak power of hundreds of watts. The laser efficiency and beam quality in the PQS regime are shown to essentially depend on the cavity arrangement and output coupler reflectivity. In particular, a maximum output power of 18.5 W in high-quality (TEM00 mode) PQS operation is obtained at a pump power of 38 W and in an asymmetrical cavity with an output coupler of reflectivity 30%. A theoretical modeling of the PQS Nd:YVO4/LiF:F2- laser is performed as well; its results are demonstrated to be in agreement with the experimental data. Copyright © 2005 by MAIK "Nauka/Interperiodica" (Russia).

Journal article

Villafana E, Kir'yanov AV, Minassian A, Damzen MJet al., 2005, Diode-side-pumped Nd:YVO<sub>4</sub> laser Q-switched with LiF:F<SUP>-</SUP><sub>2</sub> saturable absorber, 13th International Laser Physics Workshop, Publisher: IOP PUBLISHING LTD, Pages: 570-578, ISSN: 1054-660X

Conference paper

Minassian A, Thompson B, Damzen MJ, 2005, High-power TEM<sub>00</sub> grazing-incidence Nd:YVO<sub>4</sub> oscillators in single and multiple bounce configurations, OPTICS COMMUNICATIONS, Vol: 245, Pages: 295-300, ISSN: 0030-4018

Journal article

Kir'yanov AV, Villafana R E, Minassian A, Damzen MJet al., 2005, Diode-side-pumped Nd:YVO<inf>4</inf> laser Q-switched with LiF:F <inf>2</inf><sup>-</sup> crystal, Pages: 352-358, ISSN: 1094-5695

Passive Q-switching (PQS) of a diode-side-pumped Nd:YVO4 laser using a LiF:F2- crystal as a saturable absorber is reported. Using the grazing-incidence cavity geometry, we obtain trains of giant pulses of duration as short as ∼10 ns and peak power of hundreds of Watts. The laser efficiency and beam quality in the PQS regime are shown to essentially depend on the cavity arrangement and output coupler reflectivity. In particular, maximum output power of 18.5 W at high-quality (TEM00 mode) PQS operation is obtained at pump power of 38 W and asymmetrical cavity with output coupler of reflectivity 30%.

Conference paper

Kir'yanov AV, Villafana ER, Minassian A, Damzen MJet al., 2005, Diode-side-pumped Q-switched Nd: YVO<inf>4</inf> / LiF: F<inf>2</inf><sup>-</sup> laser

Passive Q-switching of diode-side-pumped Nd:YVO4 laser using LiF:F2- crystal as saturable absorber is reported. The giant-pulse (10 ns) high-quality (TEM00) operation with output power of 18.5 W is obtained at pump power of 38 W. © 2005 Optical Society of America.

Conference paper

Kir'yanov AV, Villafana ER, Minassian A, Damzen MJet al., 2005, Diode-side-pumped Q-switched Nd: YVO<inf>4</inf> / LiF: F<inf>2</inf><sup>-</sup> laser

Passive Q-switching of diode-side-pumped Nd:YVO4 laser using LiF:F2- crystal as saturable absorber is reported. The giant-pulse (10 ns) high-quality (TEM00) operation with output power of 18.5 W is obtained at pump power of 38 W. © 2005 Optical Society of America.

Conference paper

Minassian A, Thompson BA, Smith GR, Damzen MJet al., 2005, 104W Diode-pumped TEM<inf>00</inf> Nd:GdVO<inf>4</inf> master oscillator power amplifier

A Nd:GdVO4 master oscillator power amplifier in bounce amplifier configuration is demonstrated. 104W of TEM00 (M2 <1.3) CW output with 40% conversion efficiency is obtained. Acousto-optically Q-switched system produces 101W of ~20ns pulses at 400kHz. © 2005 Optical Society of America.

Conference paper

Kir'yanov AV, Villafana ER, Minassian A, Damzen MJet al., 2005, Diode-side-pumped Nd:YVO4 laser Q-switched with LiF:F2- crystal

Passive Q-switching (PQS) of a diode-side-pumped Nd:YVO4 laser using a LiF:F2- crystal as a saturable absorber is reported. Using the grazingincidence cavity geometry, we obtain trains of giant pulses of duration as short as~10 ns and peak power of hundreds of Watts. The laser efficiency and beam quality in the PQS regime are shown to essentially depend on the cavity arrangement and output coupler reflectivity. In particular, maximum output power of 18.5 W at high-quality (TEM00 mode) PQS operation is obtained at pump power of 38 W and asymmetrical cavity with output coupler of reflectivity 30%. © 2005 OSA/ASSP 2005.

Conference paper

Minassian A, Thompson BA, Smith GR, Damzen MJet al., 2005, 104W Diode-pumped TEM<inf>00</inf> Nd:GdVO<inf>4</inf> master oscillator power amplifier

A Nd:GdVO4 master oscillator power amplifier in bounce amplifier configuration is demonstrated. 104W of TEM00 (M2 <1.3) CW output with 40% conversion efficiency is obtained. Acousto-optically Q-switched system produces 101W of ~20ns pulses at 400kHz. © 2005 Optical Society of America.

Conference paper

Minassian A, Smith GR, Thompson BA, Damzen MJet al., 2005, Ultrahigh repetition rate Q-switched 101W TEM<inf>00</inf> Nd:GdVO <inf>4</inf> laser system

Conference paper

Minassian A, Sauder D, Smith GR, Thompson BA, Damzen MJet al., 2005, Diode-pumped bounce geometry Nd : GdVO4 master oscillator power amplifier with high beam quality, New York, Pacific rim conference on lasers and electro-optics, 11 - 15 July 2005, Tokyo, JAPAN, Publisher: Ieee, Pages: 150-152

Conference paper

Omatsu T, Minassian A, Damzen MJ, 2005, 45W continuous-wave output from a highly Nd doped YAG ceramic laser with a bounce amplifier geometry, Pacific Rim Conference on Lasers and Electro-Optics, Publisher: IEEE, Pages: 140-141

Conference paper

Damzen MJ, 2004, Adaptive holography and interferometry, ISSN: 0277-786X

We describe the use of saturable gain media as the basis for adaptive holography for exciting new devices for measurement and laser control. Specifically, we detail the formation of a gain grating acting as an adaptive beam combiner for high sensitivity interferometry with speckle-beams. This addresses a novel solution for on-line diagnostics and information transfer in hostile environments where speckle presents a fundamental limitation. Our interferometer provides capability for industrial non-destructive testing by remote laser detection of ultrasonic vibration of rough surfaces, but also has application in medical diagnostics with diffuse reflection from human tissue and free-space optical communications and environmental monitoring where atmospheric turbulence is the major problem.

Conference paper

Eremeykin ON, Antipov OL, Minassian A, Damzen MJet al., 2004, Efficient continuous-wave generation in a self-organizing diode-pumped Nd:YVO4 laser with a reciprocal dynamic holographic cavity., Opt Lett, Vol: 29, Pages: 2390-2392, ISSN: 0146-9592

A diode-pumped Nd:YVO4 laser is demonstrated that has a reciprocal self-intersecting loop cavity with self-organization by formation of a dynamic holographic grating induced by the generating beam. Continuous-wave high spatial quality generation (M2 < 1.2) with 9.6 W of power and 32% optical efficiency is obtained. Spectral compositions and temporal dynamics are investigated as functions of diode-pumping power.

Journal article

Thompson BA, Minassian A, Damzen MJ, 2004, Unidirectional single-frequency operation of a Nd:YVO<sub>4</sub> ring laser with and without a Faraday element, APPLIED OPTICS, Vol: 43, Pages: 3174-3177, ISSN: 1559-128X

Journal article

Damzen MJ, 2004, Optical Amplifying Device, US 7,256,931

Patent

Minassian A, Damzen MJ, 2004, 20 W bounce geometry diode-pumped Nd:YVO4 laser system at 1342 nm, OPTICS COMMUNICATIONS, Vol: 230, Pages: 191-195, ISSN: 0030-4018

Journal article

Eremeykin ON, Antipov OL, Minassian A, Damzen MJet al., 2004, An efficient cw diode-pumped Nd:YVO<inf>4</inf> laser with reciprocal self-organizing dynamic holographic cavity, Pages: 179-181, ISSN: 1094-5695

A diode-pumped Nd:YVO4 laser with a reciprocal self-intersecting loop cavity completed by dynamic grating induced by the generating beams was realized. Continuous-wave, high-quality beam generation (M2≈1) with 10W power and 32% optical efficiency was obtained. © 2004 Optical Society of America.

Conference paper

Damzen MJ, Paterson C, 2004, Adaptive optics and phase conjugate reflectors, Handbook of laser technology and applications, Editors: Webb, Jones, Webb, Jones, Bristol, Publisher: IOP, Pages: 1193-1202, ISBN: 9780750309639

Book chapter

Vlad V, Fazio E, Damzen MJ, Petris Aet al., 2004, Dynamic waveguides and gratings in photorefractive materials, Photo-excited processes, diagnostics, and applications: fundamentals and advanced topics, Editors: Peled, London, Publisher: Kluwer Academic, ISBN: 9781402075278

Book chapter

Minassian A, Damzen MJ, 2003, 13.7 W output at 1342 nm from a diode side-pumped Nd:YVO<inf>4</inf> bounce laser

In this paper, we report the operation of a diode-side-pumped Nd:YVO 4 laser using a bounce geometry producing 13.7 W of output at 1342 nm. © 2003 IEEE.

Conference paper

Thompson BA, Jackson T, Minassiam A, Damzen MJet al., 2003, Unidirectional ring laser using novel parasitic directionality control

In this paper we have shown a simple technique for creating unidirectional ring lasers without the inclusion of an intracavity isolator. Experimentally and numerically, this device gives high output powers, up to 14 W from 30 W of diode pumping, in a TEM/sub 00/ and single longitudinal mode of operation. The system was numerically modelled, with incorporation of multiple frequencies, polarisations and directions of oscillation. © 2003 IEEE.

Conference paper

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