Ideal collimation, concentration, and imaging with curved diffractive optical elements
In this article the design, optimization and characterization of diffractive optical elements formed on a curved surface are reviewed. For such curved diffractive optical elements not only the phase f...
In this article the design, optimization and characterization of diffractive optical elements formed on a curved surface are reviewed. For such curved diffractive optical elements not only the phase f...
Phase-sensitive lock-in detection of semiconductor waveguide intensity profiles
A phase-sensitive lock-in detection scheme is employed in the measurement of transverse intensity distributions in semiconductor waveguide structures. A modulated (chopped) sampling beam is scanned ac...
A phase-sensitive lock-in detection scheme is employed in the measurement of transverse intensity distributions in semiconductor waveguide structures. A modulated (chopped) sampling beam is scanned ac...
Large-area, low-noise, high-speed, photodiode-based fluorescence detectors with fast overdrive recovery
Rev. Sci. Instrum. 76, 113101 (2005); doi:10.1063/1.2126575
Published 7 November 2005
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Two large-area, low-noise, high-speed fluorescence detectors have been built. One detector consists of a photodiode with an area of 28 mm×28 mm and a low-noise transimpedance amplifier. This detector has a input light-equivalent spectral noise density of less than 3 pW/
, can recover from a large scattered light pulse within 10 µs, and has a bandwidth of at least 900 kHz. The second detector consists of a 16–mm-diam avalanche photodiode and a low-noise transimpedance amplifier. This detector has an input light-equivalent spectral noise density of 0.08 pW/, also can recover from a large scattered light pulse within 10 µs, and has a bandwidth of 1 MHz.
©2005 American Institute of Physics
| History: | Received 10 August 2005; accepted 21 September 2005; published 7 November 2005 |
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http://link.aip.org/link/?RSINAK/76/113101/1 |
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0034-6748 (print)
1089-7623 (online)
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