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

Proceedings Article | 2 October 2008 Paper
Proceedings Volume 7115, 711507 (2008) https://doi.org/10.1117/12.800415
KEYWORDS: Optical amplifiers, Fiber lasers, Fiber amplifiers, Laser systems engineering, Absorption, Amplifiers, Directed infrared countermeasures, Laser applications, Cladding, Pulsed laser operation

Proceedings Article | 24 April 2008 Paper
K. Petrowski, Diane Limsui, C. Menyuk, R. Joseph, M. Thomas, W. Torruellas
Proceedings Volume 6951, 695104 (2008) https://doi.org/10.1117/12.777577
KEYWORDS: Atmospheric propagation, Thermal blooming, Atmospheric optics, Turbulence, Laser beam propagation, Distortion, Atmospheric modeling, Refractive index, Atmospheric turbulence, Thermography

Proceedings Article | 15 April 2008 Paper
Proceedings Volume 6952, 695206 (2008) https://doi.org/10.1117/12.782852
KEYWORDS: Silica, Crystals, Fiber amplifiers, Optical amplifiers, Dispersion, Optical fibers, Laser sources, Nonlinear crystals, Laser crystals, Fiber lasers

Proceedings Article | 10 May 2007 Paper
Y. Chen, B. Matheson, W. Torruellas, J. Faroni, N. Jacobson, K. Tankala
Proceedings Volume 6552, 65520T (2007) https://doi.org/10.1117/12.721458
KEYWORDS: Fiber lasers, Laser systems engineering, Optical amplifiers, Fiber amplifiers, Laser sources, Diffraction, Semiconductor lasers, Refractive index, LIDAR, Erbium

Proceedings Article | 10 May 2007 Paper
P. Madasamy, F. Kimpel, W. Torruellas
Proceedings Volume 6552, 65520Q (2007) https://doi.org/10.1117/12.721379
KEYWORDS: Fiber amplifiers, Optical isolators, Fiber lasers, Semiconductor lasers, Ytterbium, Laser systems engineering, Refractive index, Diodes, Optical amplifiers, Laser development

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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