搜索结果: 136-144 共查到“光学工程 Modulation”相关记录144条 . 查询时间(0.022 秒)
Carbon dioxide detection using NIR diode laser based wavelength modulation photoacoustic spectroscopy
photoacoustic spectroscopy NIR diode laser
2008/2/5
A photoacoustic sensor using a laser diode emitting near 1573 nm in combination with a dual-microphone resonant photoacoustic cell has been developed for carbon dioxide trace gas analysis at atmospher...
Carbon dioxide detection using NIR diode laser based wavelength modulation photoacoustic spectroscopy
photoacoustic spectroscopy NIR diode laser
2008/2/5
A photoacoustic sensor using a laser diode emitting near 1573 nm in combination with a dual-microphone resonant photoacoustic cell has been developed for carbon dioxide trace gas analysis at atmospher...
Microphotoreflectance spectroscopy – a modulation technique with high spatial resolution
photoreflectance high resolution
2007/4/4
There is presented an experimental setup for the measurements of photomodulated reflectivity spectra of low-dimensional semiconductor structures with a micrometer spatial (plane) resolution. The setup...
Transmission analysis of long-period fiber grating with trapezoid index modulation
long-period fiber grating trapezoid index modulation transmission spectrum
2006/1/28
The long-period fiber grating (LPG) with trapezoid index modulation is presented as a novel grating. The influence of the difference between the top width and the bottom width (simplified to d in the ...
Analysis of mounting induced strain in semiconductor structures by means of spatially resolved optical modulation techniques
electroreflectance mounting induced strain laser bar
2005/3/27
A wide range of applications of high-power diode lasers is connected with the tendency towards device miniaturization resulting in increased power densities. To manage the thermal load, the chips or a...
Optical properties of InGaAsP quantum well for infrared emission investigated by modulation spectroscopy
photoreflectance quantum well
2005/3/27
Modulation spectroscopy, i.e., photoreflectance (PR) and contactless electroreflectance (CER) are very powerful techniques to investigate optical properties of nanostructures. These techniques togethe...
Theoretical study on wavelength conversion using cross-polarization modulation in a single semiconductor optical amplifier
wavelength conversion cross-polarization modulation semiconductor optical amplifier
2005/2/26
Wavelength conversion based on the cross-polarization modulation (XPM) in a single semiconductor optical amplifier (SOA) has been numerically investigated by using the theoretical model in which the b...
Sol-gel derived optical waveguide films for planar sensors with phase modulation
sol-gel silica-titania film dip coating planar waveguide planar sensor
2004/3/26
The paper presents the results of investigation of the technology of optical waveguide films produced with the sol-gel technique. The silica-titania films were deposited on glass substrates by a deep ...
Simultaneous demonstration on 10 Gb/s wavelength conversion four-wave mixing and cross-gain modulation in semiconductor optical amplifier
semiconductor optical amplifier (SOA) cross-gain modulation (XGM) four-wave mixing (FWM) wavelength conversion
2004/1/25
A study is presented on wavelength conversion in semiconductor optical amplifier (SOA) when the power of the input pump light is as much as that of the input signal light, in which the four-wave mixin...