Search results
The direction in which maximum efficiency is achieved is called the blaze angle and is the third crucial characteristic of a blazed grating directly depending on blaze wavelength and diffraction order. Blaze angle.
The wavelength of light that yields the greatest absolute efficiency of the ruled diffraction grating is called the blaze wavelength. Light equal to the blaze wavelength will have a diffraction angle equal to the blaze angle when the incident angle of the light is also equal to the blaze angle.
Sep 1, 2022 · The blaze wavelength is one of the three main characteristics of the blazed grating. The other two, shown in Figure 3, are , the groove or facet spacing, and , the blaze angle. The blaze angle is the angle between the surface structure and the surface parallel. It is also the angle between the surface normal and the facet normal.
For an appropriate blaze angle, which also minimizes Bragg reflection into the guided mode, the radiated light has an angular and spectral bandwidth. At this blaze angle, the period of the grating determines the wavelength of peak loss.
When choosing a grating it is important to specify the wavelength range, blaze wavelength (which is the wavelength in the diffracted spectrum with the highest efficiency), and blaze angle. The blaze angle describes the first order diffracted angle of the blaze wavelength.
these factors to define efficiency, ruled gratings are usually more efficient than holographic ratings. Blaze wavelength The term “blaze angle” is used to describe the angle on a ruled grating that is created by the longer side of the groove and the plane of the grating. The blaze angle occurs on ruled gratings because the diamond-
Classically, for ruled gratings, the blaze angle is calculated using the Grating Equation for the desired blaze wavelength in the Littrow mounting, where θ = θ’, so, by definition, it is only good for one wavelength at one angle in a mounting configuration that is rarely used in practice.
