Gain Flattening Filter (GFFs), also known as gain equalizing filters, are used to flatten or smooth out unequal signal intensities over a specified wavelength range. This unequal signal intensity usually occurs after an amplification stage (e.g., EDFA and/or Raman). Typically, GFFs are used in conjunction with gain amplifiers to ensure that the amplified channels all have the same gain.
Iridian excels in designing and fabricating high-performance GFFs that meet the most stringent demands. Ongoing R&D investment in this field ensures that our Gain Flattening Filters remain outstanding in performance as well as the most cost-effective in the industry.
Iridian Gain Flattening Filters Advantage:
Iridian's proprietary design and deposition technologies result in GFFs that outperform traditional filters. Iridian’s extensive library includes hundreds of different types of GFFs varying in complexity from simple parabolic shapes to very difficult shapes possessing high modulation depths and steep slopes.
GFF Product Example No.1
Part Number: Example
.jpg)
Iridian’s extensive library includes hundreds of different types of GFFs varying in complexity from simple parabolic shapes to very difficult shapes possessing high modulation depths and steep slopes.
Product Information:
| Optical Specifications |
| Wavelength Range (nm) |
C - Band |
| Modulation Depth (dB) |
5.3 |
| Slope (dB/nm) |
1.5 |
| Insertion Loss (dB) |
< 0.2 |
| Peak-to-Peak Error Function (dB) |
< 0.5 |
| Angle of Incidence (degrees) |
2 - 5 |
| Entrance and Exit Media |
Air |
| Polarization Dependent Loss (PDL) (dB) |
< 0.05 |
| Temperature Coefficient (pm/oC) |
< 3 |
| Physical Specifications |
| Wedge Angle (degrees) |
0.2 ± 0.07 |
| Reliability |
| Environmental Testing |
Telcordia GR1221 |
| Mechanical Durability |
Telcordia GR1221 |
|
GFF Product Example No. 2
Part Number: Example
.jpg)
Iridian’s extensive library includes hundreds of different types of GFFs varying in complexity from simple parabolic shapes to very difficult shapes possessing high modulation depths and steep slopes. To specify your Gain Flattening Filter, please complete My Filter Request form.
Product Information:
| Optical Specifications |
| Wavelength Range (nm) |
C-Band |
| Modulation Depth (dB) |
4.9 |
| Slope (dB/nm) |
0.9 |
| Insertion Loss (dB) |
< 0.2 |
| Peak-to-Peak Error Function (dB) |
< 0.5 |
| Angle of Incidence (degrees) |
2-5 |
| Entrance and Exit Media |
Air |
| Polarization Dependent Loss (PDL) (dB) |
< 0.1 |
| Temperature Coefficient (pm/oC) |
< 2 |
| Physical Specifications |
| Wedge Angle (degrees) |
0.2 +/- 0.07 |
| Reliability |
| Environmental Testing |
Telcordia GR1221 |
| Mechanical Durability |
Telcordia GR1221 |
|
GFF Product Example No. 3
Part Number: Example
.jpg)
Product Information:
| Optical Specifications |
| Wavelength Range (nm) |
C-Band |
| Modulation Depth (dB) |
8.3 |
| Slope (dB/nm) |
2.1 |
| Insertion Loss (dB) |
< 0.15 |
| Peak-to-Peak Error Function (dB) |
< 0.5 |
| Angle of Incidence (degrees) |
1.8 |
| Entrance and Exit Media |
Air |
| Polarization Dependent Loss (PDL) (dB) |
< 0.05 |
| Temperature Coefficient (pm/oC) |
< 2 |
| Physical Specifications |
| Wedge Angle (degrees) |
0.2 +/- 0.07 |
| Reliability |
| Environmental Testing |
Telcordia GR1221 |
| Mechanical Durability |
Telcordia GR1221 |
|
