Dr. William E. Torruellas
Senior Laser Engineer at Johns Hopkins Univ
SPIE Involvement:
Conference Program Committee | Conference Chair | Author | Instructor
Publications (15)

PROCEEDINGS ARTICLE | October 2, 2008
Proc. SPIE. 7115, Technologies for Optical Countermeasures V
KEYWORDS: Fiber amplifiers, Optical amplifiers, Cladding, Laser applications, Amplifiers, Fiber lasers, Pulsed laser operation, Laser systems engineering, Directed infrared countermeasures, Absorption

PROCEEDINGS ARTICLE | April 24, 2008
Proc. SPIE. 6951, Atmospheric Propagation V
KEYWORDS: Thermography, Refractive index, Laser beam propagation, Distortion, Turbulence, Atmospheric turbulence, Atmospheric propagation, Thermal blooming, Atmospheric modeling, Atmospheric optics

PROCEEDINGS ARTICLE | April 15, 2008
Proc. SPIE. 6952, Laser Source Technology for Defense and Security IV
KEYWORDS: Optical fibers, Fiber amplifiers, Laser sources, Optical amplifiers, Silica, Dispersion, Crystals, Fiber lasers, Laser crystals, Nonlinear crystals

PROCEEDINGS ARTICLE | May 10, 2007
Proc. SPIE. 6552, Laser Source Technology for Defense and Security III
KEYWORDS: Fiber amplifiers, Refractive index, Optical amplifiers, Laser development, Fiber lasers, Semiconductor lasers, Ytterbium, Diodes, Optical isolators, Laser systems engineering

PROCEEDINGS ARTICLE | May 10, 2007
Proc. SPIE. 6552, Laser Source Technology for Defense and Security III
KEYWORDS: Fiber amplifiers, Laser sources, Diffraction, Refractive index, Optical amplifiers, LIDAR, Fiber lasers, Semiconductor lasers, Erbium, Laser systems engineering

PROCEEDINGS ARTICLE | October 20, 2006
Proc. SPIE. 6371, Photonic Sensing Technologies
KEYWORDS: Signal to noise ratio, Fiber amplifiers, Optical filters, Optical amplifiers, Phase modulation, Digital filtering, Interference (communication), Lab on a chip, Signal detection, Bandpass filters

Showing 5 of 15 publications
Conference Committee Involvement (4)
Fiber Lasers VIII: Technology, Systems, and Applications
24 January 2011 | San Francisco, California, United States
Fiber Lasers VII: Technology, Systems, and Applications
25 January 2010 | San Francisco, California, United States
Fiber Lasers VI: Technology, Systems, and Applications
26 January 2009 | San Jose, California, United States
Nonlinear Optical Materials
1 November 1999 | Bellevue, WA, United States
Course Instructor
SC784: Fiber Lasers for Defense Applications: Fibers, Components and System Design Considerations
Fiber laser technology has the potential to make a significant impact in many defense applications, from LIDAR and remote sensing to high energy laser weapons systems. This emerging laser technology offers many intrinsic advantages over traditional DPSSLs. Widespread publications in the research community have demonstrated an impressive array of power scaling results, both CW and pulsed and at wavelengths from 1um to the eyesafe 1.5um and 2um wavelengths. Advantages associated with the technology are high wallplug efficiency leading to reduced electrical power requirements and easier system cooling, but also robustness, good beam quality and highly flexible system performance. These, coupled with (remote) fiber delivery options make the technology unique in certain applications. The topics to be covered include: an explanation of the basic fiber parameters, double-clad fiber designs and covering such concepts such as large mode area fibers, modal/beam quality, PM fibers etc.; rare earth doping and spectroscopy of Yb-1um, Yb:Er-1550 and Tm-2um; component specifications and availability (couplers, isolators, seed laser diodes etc); limitations to scaling fiber devices, non-linear limitations, damage thresholds, etc.; design rules and concepts for pulsed fiber lasers and amplifier chains, recent results from the literature; and system specifications and possible application areas, comparison and advantages over other laser technologies. This tutorial will cover the major aspects of designing and building a fiber laser, from the fiber itself through the various state of the art fiber components and discuss the system parameter space that best makes use of the intrinsic advantages of the technology.
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