Publications
363 results found
SOAN PJ, CROFTS GJ, DAMZEN MJ, 1992, INCOHERENT 2-BEAM IMAGE TRANSFER IN A DYE AMPLIFIER, OPTICS COMMUNICATIONS, Vol: 94, Pages: 133-138, ISSN: 0030-4018
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- Citations: 3
DAMZEN MJ, GREEN RPM, CROFTS GJ, 1992, HIGH-REFLECTIVITY 4-WAVE-MIXING BY GAIN SATURATION OF NANOSECOND AND MICROSECOND RADIATION IN NDYAG, OPTICS LETTERS, Vol: 17, Pages: 1331-1333, ISSN: 0146-9592
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- Citations: 27
Damzen MJ, Green RP, Crofts GJ, 1992, High-reflectivity four-wave mixing by gain saturation of nanosecond and microsecond radiation in Nd:YAG., Opt Lett, Vol: 17, ISSN: 0146-9592
BARRY N, DAMZEN MJ, 1992, 2-BEAM COUPLING AND RESPONSE-TIME MEASUREMENTS IN BARIUM-TITANATE USING HIGH-INTENSITY LASER-PULSES, JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, Vol: 9, Pages: 1488-1492, ISSN: 0740-3224
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- Citations: 15
CROFTS GJ, GREEN RPM, DAMZEN MJ, 1992, INVESTIGATION OF MULTIPASS GEOMETRIES FOR EFFICIENT DEGENERATE 4-WAVE-MIXING IN ND-YAG, OPTICS LETTERS, Vol: 17, Pages: 920-922, ISSN: 0146-9592
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- Citations: 46
Crofts GJ, Green RP, Damzen MJ, 1992, Investigation of multipass geometries for efficient degenerate four-wave mixing in Nd:YAG., Opt Lett, Vol: 17, Pages: 920-922, ISSN: 0146-9592
Degenerate four-wave mixing in the saturable gain of a flash-lamp-pumped Nd:YAG amplifier has been investigated. Three different geometries are examined in which the probe beam experiences (a) one pass, (b) two passes, and (c) four passes of the four-wave interaction region. It is found that multipassing the gain medium has a dramatic effect on the efficiency of the process, with a phase-conjugate reflectivity of 2500 and a conjugate energy extraction efficiency of greater than 200% demonstrated.
Soan PJ, Case AD, Damzen MJ, et al., 1992, High-reflectivity four-wave mixing by saturable gain in Rhodamine 6G dye., Opt Lett, Vol: 17, Pages: 781-783, ISSN: 0146-9592
Four-wave mixing in a saturated gain medium has been modeled numerically, and the predictions for the reflectivity have been compared with experiments carried out in the laser-pumped dye Rhodamine 6G. It is demonstrated that the saturable absorption of the inversion laser pump has a dramatic influence on the intensity dependence of the four-wave-mixing reflectivity.
SOAN PJ, CASE AD, DAMZEN MJ, et al., 1992, HIGH-REFLECTIVITY 4-WAVE-MIXING BY SATURABLE GAIN IN RHODAMINE-6G DYE, OPTICS LETTERS, Vol: 17, Pages: 781-783, ISSN: 0146-9592
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- Citations: 28
CASE AD, SOAN PJ, DAMZEN MJ, et al., 1992, COAXIAL FLASH-LAMP-PUMPED DYE-LASER WITH A STIMULATED BRILLOUIN-SCATTERING REFLECTOR, JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, Vol: 9, Pages: 374-379, ISSN: 0740-3224
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- Citations: 9
CROFTS GJ, DAMZEN MJ, LAMB RA, 1991, EXPERIMENTAL AND THEORETICAL INVESTIGATION OF 2-CELL STIMULATED-BRILLOUIN-SCATTERING SYSTEMS, JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, Vol: 8, Pages: 2282-2288, ISSN: 0740-3224
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- Citations: 31
DAMZEN MJ, LAMB RA, WONG GKN, 1991, ULTRASHORT PULSE GENERATION BY PHASE LOCKING OF MULTIPLE STIMULATED BRILLOUIN-SCATTERING, OPTICS COMMUNICATIONS, Vol: 82, Pages: 337-341, ISSN: 0030-4018
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- Citations: 14
CROFTS GJ, DAMZEN MJ, 1991, STEADY-STATE ANALYSIS AND DESIGN CRITERIA OF 2-CELL STIMULATED BRILLOUIN-SCATTERING SYSTEMS, OPTICS COMMUNICATIONS, Vol: 81, Pages: 237-241, ISSN: 0030-4018
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- Citations: 12
Crofts GJ, Wong GKN, Damzen MJ, 1990, Stimulated Brillouin scattering with optical feedback: An enhanced phase conjugator with wide operational power range, Pages: 282-283
The use of optical feedback to reduce significantly the threshold power requirement, increase reflectivity, and improve the pulse conjugate fidelity of the stimulated Brillouin scattering (SOS) process is reported. Optical feedback is accomplished by taking the throughput of the pump beam from the SBS cell and redirecting it to overlap with the main pump input at a small angle. The feedback of the pump enhances the acoustic wave generation, and the Stokes radiation retracing the feedback path acts as a seeding signal. The Stokes radiation is generated by a Brillouin four-wave mixing process and provides a signal that is stronger and more correlated to the pump than the spontaneous noise would be. The consequence is a significant enhancement of the SBS process leading to a reduction in threshold power and high reflectivity, particularly for the conjugate part of the signal. The improvement in phase conjugate fidelity (PCF) was assessed for a pulsed frequency-doubled Nd:YAG laser system. Throughout most of the input energy range the PCF was >85% with feedback. When the feedback arm was blocked a significant reduction in fidelity was observed. In this experiment, at the highest powers used, the feedback/SBS reflectivity was 90%, at which time the PCF was approximately 90%.
WONG GKN, DAMZEN MJ, 1990, INVESTIGATIONS OF OPTICAL FEEDBACK USED TO ENHANCE STIMULATED SCATTERING, IEEE JOURNAL OF QUANTUM ELECTRONICS, Vol: 26, Pages: 139-148, ISSN: 0018-9197
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- Citations: 28
OSBORNE MR, SCHROEDER WA, DAMZEN MJ, et al., 1989, LOW-DIVERGENCE OPERATION OF A LONG-PULSE EXCIMER LASER USING A SBS PHASE-CONJUGATE CAVITY, APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY, Vol: 48, Pages: 351-356, ISSN: 0721-7269
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- Citations: 24
SCHROEDER WA, DAMZEN MJ, HUTCHINSON MHR, 1989, POLARIZATION-DECOUPLED BRILLOUIN-ENHANCED 4-WAVE MIXING, IEEE JOURNAL OF QUANTUM ELECTRONICS, Vol: 25, Pages: 460-469, ISSN: 0018-9197
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- Citations: 18
SCHROEDER WA, DAMZEN MJ, HUTCHINSON MHR, 1989, STUDIES OF A SINGLE-FREQUENCY STIMULATED-BRILLOUIN-SCATTERING PHASE-CONJUGATE ND-YAG LASER-OSCILLATOR, JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, Vol: 6, Pages: 171-179, ISSN: 0740-3224
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- Citations: 4
CASE AD, OSBORNE MR, DAMZEN MJ, et al., 1989, A FLASHLAMP-PUMPED DYE-LASER WITH A SBS PHASE-CONJUGATE RESONATOR, OPTICS COMMUNICATIONS, Vol: 69, Pages: 311-314, ISSN: 0030-4018
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- Citations: 9
WONG GKN, DAMZEN MJ, 1988, ENHANCEMENT OF THE PHASE-CONJUGATE STIMULATED BRILLOUIN-SCATTERING PROCESS USING OPTICAL FEEDBACK, JOURNAL OF MODERN OPTICS, Vol: 35, Pages: 483-490, ISSN: 0950-0340
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- Citations: 12
DAMZEN MJ, HUTCHINSON MHR, SCHROEDER WA, 1987, DIRECT MEASUREMENT OF THE ACOUSTIC DECAY TIMES OF HYPERSONIC WAVES GENERATED BY SBS, IEEE JOURNAL OF QUANTUM ELECTRONICS, Vol: 23, Pages: 328-334, ISSN: 0018-9197
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- Citations: 34
Damzen MJ, Hutchinson MH, Schroeder WA, 1987, Single-frequency phase-conjugate laser resonator using stimulated Brillouin scattering., Opt Lett, Vol: 12, Pages: 45-47, ISSN: 0146-9592
An experimental investigation of a phase-conjugate laser resonator using a Nd:YAG gain medium and incorporating Brillouin-enhanced four-wave mixing is reported. Phase-conjugate reflectivities of greater than unity and stable oscillation between a single laser frequency and a counterpropagating Stokes frequency are demonstrated.
DAMZEN MJ, HUTCHINSON MHR, SCHROEDER WA, 1987, SINGLE-FREQUENCY PHASE-CONJUGATE LASER RESONATOR USING STIMULATED BRILLOUIN-SCATTERING, OPTICS LETTERS, Vol: 12, Pages: 45-47, ISSN: 0146-9592
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- Citations: 12
Damzen MJ, Hutchinson MH, 1985, Technique for measuring phase-conjugation fidelity by heterodyning signals., Opt Lett, Vol: 10, Pages: 40-42, ISSN: 0146-9592
A simple heterodyning technique is described that permits a rigorous measurement of the phase-conjugate fraction of a scattered beam in Brillouin scattering. A general expression for interferometry using phase-conjugate mirrors is derived. The applications of the technique to the measurement of laser phase structure and intensity-dependent phase shifts, and also for high-resolution determination of Brillouin acoustic frequencies, are discussed.
DAMZEN MJ, HUTCHINSON MHR, 1985, TECHNIQUE FOR MEASURING PHASE-CONJUGATION FIDELITY BY HETERODYNING SIGNALS, OPTICS LETTERS, Vol: 10, Pages: 40-42, ISSN: 0146-9592
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- Citations: 3
Damzen MJ, Hutchinson MH, 1984, Pulse compression in a phase-conjugating Brillouin cavity., Opt Lett, Vol: 9, Pages: 282-284, ISSN: 0146-9592
By the formation of two Brillouin mirrors at either end of a methane chamber, a Brillouin cavity has been produced that is capable of oscillation when injected by a laser pulse. The pulse-compressing mechanisms of the Brillouin mirrors cause a train of intense short-duration pulses to be produced, and the Brillouin cavity displays the characteristic of a phase-conjugate resonator.
Damzen MJ, Hutchinson MHR, 1984, APPLICATIONS OF THE BRILLOUIN MIRROR FOR THE CONTROL OF HIGH-POWER LASERS., Pages: 120-121
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- Citations: 2
DAMZEN MJ, HUTCHINSON MHR, 1984, APPLICATIONS OF THE BRILLOUIN MIRROR FOR THE CONTROL OF HIGH-POWER LASERS, JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, Vol: 1, Pages: 534-535, ISSN: 0740-3224
DAMZEN MJ, HUTCHINSON MHR, 1984, PULSE-COMPRESSION IN A PHASE-CONJUGATING BRILLOUIN CAVITY, OPTICS LETTERS, Vol: 9, Pages: 282-284, ISSN: 0146-9592
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- Citations: 3
Damzen MJ, Hutchinson MH, 1983, High-efficiency laser-pulse compression by stimulated Brillouin scattering., Opt Lett, Vol: 8, Pages: 313-315, ISSN: 0146-9592
Highly efficient compression of laser pulses down to 1 nsec in duration by stimulated Brillouin scattering has been demonstrated. Compression ratios of ~10 and energy-conversion efficiencies >70% have been produced. Several compressor systems have been investigated, including the use of tapered waveguides, long-focal-length geometries, and generator-amplifier systems.
DAMZEN MJ, HUTCHINSON MHR, 1983, HIGH-EFFICIENCY LASER-PULSE COMPRESSION BY STIMULATED BRILLOUIN-SCATTERING, OPTICS LETTERS, Vol: 8, Pages: 313-315, ISSN: 0146-9592
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- Citations: 70
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