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Transmitting Bragg Grating (TBG) Specifications

Specifications for transmitting Bragg grating in PTR glass

Product code for Transmitting Bragg Gratings (TBG) has the following main structure:

TBG-WL-DE :
WL – resonant wavelength (nm)
DE – diffraction efficiency (%)

Additional grating parameters are:

IA-EA-T×W×H-AR :

IA – incident Bragg angle (deg)

EA – exit angle after the grating (deg)

T, W, H – grating thickness, width, and height (mm×mm×mm)

AR – optional antireflection coating (narrowband NB or broadband BB); if not specified – uncoated grating (U)

Product code for Transmitting Bragg Gratings (TBG) has the following main structure:

GL-AS-WS-d-n-RIM-SL :

GL – grating losses (%)

AS – angular selectivity (mrad)

WS – wavelength or spectral selectivity (nm)

d – grating period (um)

n – refractive index at resonant wavelength

RIM – refractive index modulation (ppm)

SL – grating slant angle inside the glass wafer (deg)

Transmitting Bragg gratings can be designed and manufactured within the following range of their parameters
See Table 1
Transmitting Bragg gratings can be designed and manufactured within the following range of their parameters in Table 1:
See Table 1
For a sample grating TBG-1085-99.9, the full set of the grating parameters and their tolerances is shown in Table 2:
See Table 2

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