Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Donald F. Heller"'
Autor:
Marc Klosner, Chunbai Wu, Sergey A. Ermilov, Mark A. Anastasio, Yang Lou, Pratik Talole, Richard Su, Hans-Peter Brecht, Alexander A. Oraevsky, Gary Chan, Vassili Ivanov, Donald F. Heller
Publikováno v:
SPIE Proceedings.
We describe the ongoing development and performance of a high-pulse-energy wavelength-cycling laser system for three-dimensional optoacoustic tomography of the breast. Joule-level energies are desired for achieving the required penetration depths whi
Autor:
John A. Kozub, M. Shane Hutson, Jin Shen, Marc Klosner, Karen M. Joos, Marcus H. Mendenhall, Borislav Ivanov, Aroshan Jayasinghe, Ratna Prasad, Donald F. Heller, David W. Piston
Publikováno v:
Biomedical Optics Express
Prior work with free-electron lasers (FELs) showed that wavelengths in the 6- to 7-µm range could ablate soft tissues efficiently with little collateral damage; however, FELs proved too costly and too complex for widespread surgical use. Several alt
Autor:
Karl F. Freed, Donald F. Heller
Publikováno v:
International Journal of Quantum Chemistry. 6:267-277
A theory is presented to describe the dependence of nonradiative decay rates of polyatomic molecules upon the initially selected vibronic states. In the large molecule statistical limit it is demonstrated that it is possible to assign vibrational fre
Publikováno v:
SPIE Proceedings.
Globally, cancer is a major health issue as advances in modern medicine continue to extend the human life span. Breast cancer ranks second as a cause of cancer death in women in the United States. Photoacoustic (PA) imaging (PAI) provides high molecu
Publikováno v:
SPIE Proceedings.
We describe the ongoing development of laser systems for advanced photoacoustic imaging (PAI). We discuss the characteristics of these laser systems and their particular benefits for soft tissue imaging and next-generation breast cancer diagnostics.
Autor:
Richard Scheps, Donald F. Heller
Publikováno v:
Applied optics. 28(24)
Single-longitudinal-mode operation is reported for miniature Nd:YAG and Nd:BEL standing wave resonators. The best performance obtained was 18 mW with laser diode pumping and 31 mW with dye laser pumping. The miniature lasers were also operated multim
Autor:
Yehuda B. Band, Paul A. Papanestor, Timothy C. Chin, Donald F. Heller, Jerzy S. Krasinski, Robert C. Morris
Publikováno v:
Optics letters. 14(8)
Spectral consequences that result from using birefringent media with broadband gain inside of laser cavities containing polarizing elements are described. We show that the laser intensity is modulated as a function of the output frequency unless the
Publikováno v:
Optics letters. 11(4)
We show that there is a simple correlation between the modulation transfer function (MTF) of alexandrite laser rods and the thresholds of these rods as cw lasers. Thus the MTF provides a novel and important way to evaluate material (before or after f
Publikováno v:
Physical Review A. 42:1515-1521
We calculate the spectrum of second-harmonic generation (SHG) for multimode input fields. We show that SHG cannot be described as the degenerate limit of sum-frequency generation (SFG) for multimode fields, because the dynamical equations describing
Publikováno v:
IEEE Journal of Quantum Electronics. 26:1259-1264
Dynamical equations describing the amplification and propagation of an initial Stokes seed pulse in a synchronously pumped fiber Raman laser configuration are formulated, and analytic solutions are derived. A train of Stokes shifted pulses is produce