Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Gregory E. Obarski"'
Autor:
Charles L. Beckel, Gregory E. Obarski
Publikováno v:
Bioelectromagnetics. 13:79-89
We describe a new system for exposing cultured biological cells that have been plated on coverslips to strong electrostatic fields at magnitudes greater than 10(3) V/cm. Techniques are described that make use of mineral oil to render insignificant el
Autor:
Gregory E. Obarski
Publikováno v:
Noise in Physical Systems and 1/F Fluctuations.
Publikováno v:
SPIE Proceedings.
We have conducted thorough analysis of a vertical-cavity surface-emitting laser (VCSEL) diode which produces TEM01* (donut) and higher-order modes. Our analysis includes the following quantities as a function of drive current: optical power, spectral
Publikováno v:
SPIE Proceedings.
Using a well-characterized measurement system having 22 GHz bandwidth, we show that the relative intensity noise (RIN) of a commercial InGaAsP laser (multi-longitudinal mode) operating at 77 K is significantly reduced below room temperature values ov
Publikováno v:
Integrated Photonics Research.
Cryogenic operation of semiconductor lasers offers the potential for greater bandwidth due to improved frequency modulation response,1,2 lower threshold current, and higher power efficiency3 over that of room temperature operation. The 3- dB electric
Publikováno v:
SPIE Proceedings.
The image of a circular edge was calculated as determined by a scanning confocal microscope with fully coherent illumination. In scalar theory, the quarter-intensity point locates the geometrical-optics image of a straight edge. For a circular object
Autor:
Gregory E. Obarski
Publikováno v:
SPIE Proceedings.
To accurately measure wavelengths of 1.3 and 1.5 micrometers single-mode sources, we developed a lambdameter that can be used in the near IR and the red regions of the spectrum. Wavelength accuracy and resolution are approximately equals 0.1 ppm (par
Autor:
Gregory E. Obarski, Jolene D. Splett
Publikováno v:
Journal of the Optical Society of America B. 18:750
We have developed a transfer standard for the spectral density of relative intensity noise (RIN) of optical fiber sources near 1550 nm. Amplified spontaneous emission (ASE) from an erbium-doped fiber amplifier (EDFA), when it is optically filtered ov