High-resolution grating areas with none stitching error are in demanding needs but usually expensive and hard to prepare.
This technology is suitable for producing large area high resolution gratings to reduce the research cost, and can be applied to applications such as DFB laser production, LED substrates preparation and other relative fields.
Modern tunable lasers can easily resolve spectral features less than 106 hertz wide, while the highest-resolution grating spectrometers have resolutions that are hundreds of times lower.
For high-resolution grating spectra, the detector channels are wavelengths derived from pixel location.
Astronomers tend to use mostly CGS units, such as [ergs] for energy, [ergs/s/cm2] for flux, etc. Spectra are displayed as functions of either energy (in [keV], for low-resolution spectra) or wavelength (in for high-resolution grating spectra).
The spectrograph used a high-resolution grating (1800 grooves cm 1) with additional band-pass filter optics, a confocal microscope and a 2D-CCD camera.
Surface-enhanced Raman scattering was measured with a confocal Raman microscope (LabRAM Division, HORIBA Jobin Yvon) equipped with a high-resolution grating (1800 grooves/mm), a Peltier-cooled CCD camera (−70 °C, Synapse) and a HeNe laser as excitation line at 633 nm.
The XANES measurements were conducted on the high resolution spherical grating monochromator (SGM) [21] and variable line spacing plane grating monochromator (VLS PGM) [22] beamlines at the Canadian Light Source synchrotron facility.
However, high resolution Chandra grating observations of accreting T-Tauri stars have demonstrated the X-ray emission to be more complex and it is no longer clear that this soft component originates in the accretion shock.
A new spectroscopic filter constructed with a high-spectral-resolution grating and two narrow-band mirrors is designed to separate the elastic scattering and the vibrational Raman scattering spectra in an ultraviolet (UV) Raman lidar system.
Nevejans, D. et al. Compact high-resolution spaceborne echelle grating spectrometer with acousto-optical tunable filter based on order sorting for the infrared domain from 2.2 to 4.3 μm.
