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Precise Beam Shaping of Diode Laser —Direct Application of LD Light for Material Processing—
Laser diode, Collimator lens Wavefront distortion Laser ablative shaping
2009/6/10
Current techniques developed for beam shaping of multi-mode laser diode (LD) output are reviewed and a new approach for the direct micro-processing with a single-mode LD is reported. The advantage of ...
Carbon dioxide detection using NIR diode laser based wavelength modulation photoacoustic spectroscopy
photoacoustic spectroscopy NIR diode laser
2011/5/5
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
2011/5/5
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...
Improvement of the hot work tool steel surface layers properties using a high power diode laser
Improvement properties Surface layers HPDL laser Ceramic particles
2010/2/22
Purpose: The purpose of this research paper is focused on the X38CrMoV5-3 hot work tool steel surface layers properties using HPDL laser.Design/methodology/approach: The aim of this research paper is ...
Scalar and vectorial approaches to cavity modes of the GaAs-based 1.3-μm oxide-confined edge emitting diode laser
laser simulations laser modes
2011/5/4
The modelling of optical fields within cavities of GaAs-based oxide-confined edge-emitting diode lasers is analysed treating the 1.3-mm InGaAs/GaAs quantum-well laser as an example of a typical device...
Highly sensitive tunable diode laser absorption spectroscopy of CO2 around 1.53 μm
wavelength modulation diode lasers absorption spectroscopy
2011/4/28
The absolute absorption spectrum intensities of carbon dioxide sample have been recorded with a tunable diode laser spectrometer in the spectral range 6506–6520 cm–1, which is suitable for the in situ...
An impact of a localization of an oxide aperture within a vertical-cavity surface-emitting diode laser (VCSEL) cavity on its lasing threshold
semiconductor laser vertical-cavity surface-emitting diode laser (VCSEL)
2011/4/27
In the present paper, an impact of localization of an oxide aperture within a vertical-cavity surface-emitting diode laser (VCSEL) on its threshold operation is analyzed. As expected, a shift of the a...
Analysis of high-power diode laser thermal properties by micro-Raman spectroscopy
Raman spectroscopy catastrophic optical mirror damage (COMD) high-power laser thermoreflectance
2011/4/27
Spatially resolved micro-Raman measurements have been performed to determine temperature distribution over the facet of high power semiconductor diode lasers. This technique is non-invasive and allows...
Highly sensitive diode laser absorption measurements of CO2 near 1.57 μm at room temperature
wavelength modulation diode lasers absorption spectroscopy
2011/4/26
The absolute absorption spectrum intensities of carbon dioxide sample have been recorded with a tunable diode laser spectrometer in the spectral range 6350–6364 cm–1, which is suitable for the in situ...
Near-IR diode laser-based sensor for remote sensing of methane leakage
wavelength modulation spectroscopy tunable diode laser spectroscopy methane gas sensor diode laser
2011/4/26
A tunable diode laser-based sensor for remote sensing of methane (CH4) leakage at a wavelength of 1.65 mm was developed. The 1.65 mm distributed feedback (DFB) diode laser has a narrow line width and ...
Stabilization of diode-laser frequency to atomic transitions
laser stabilization dichroism
2011/4/26
Different methods of stabilization of diode lasers are reviewed with the emphasis on stabilization to atomic transitions. The stabilization methods to Doppler-broadened and Doppler-free resonances are...
Cavity enhanced absorption spectroscopy of carbon dioxide using a DFB diode laser and a swept optical cavity
spectroscopy cavity enhanced absorption spectroscopy (CEAS) carbon dioxide
2011/4/26
A compact DFB tunable diode laser operating around 1.572 mm was used to study the cavity enhanced absorption spectroscopy of carbon dioxide near 1.572 mm. It was experimentally demonstrated that a nar...
