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1550nm Laser Line Filter FWHM 30nm
1550nm Laser Line Filter FWHM 30nm is an NIR narrow bandpass filter optimize design for InGaAsP. Coligh manufactures 254nm to 1550nm laser bandpass filters.
- Special design for InGaAsP
- Center wavelength 1550nm
- FWHM 30nm
- Blocking depth OD4
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1550nm Laser Line Filter FWHM 30nm Description
1550nm Laser Line Filter (FWHM 30nm) is a high-performance interference filter designed for InGaAsP Indium Gallium Arsenide Phosphate photodetectors or lasers.
- The central wavelength is 1550nm+/-2nm, covering the core area of 1530-1565nm in the C-band of optical fiber communication.
- The half-bandwidth of 30+/-2nm is compatible with multi-channel transmission requirements.
- The transmittance in the passband area is greater than or equal to 80%, and the cut-off depth OD4 in the range of 200-1850nm effectively isolates out-of-band stray light.
1550nm Laser Line Filter FWHM 30nm Technical Datasheet
| arameter | Specification |
| Center Wavelength (CWL) | 1550 nm ± 2 nm |
| Bandwidth (FWHM) | 30 nm ± 2 nm |
| Peak Transmission | ≥ 80% |
| Blocking Range | OD4 from 200nm to 1850nm |
| Suitable laser | InGaAsP Laser |
| Substrate Material | Fused silica / Optical glass |
| Surface Quality | 80-50， 60-40， 40-20 scratch-dig (per MIL-PRF-13830B) |
| Clear Aperture | > 90% of the diameter |
| Filter Diameter | Customizable (e.g.2.0mm, 12.5 mm, 25 mm, 50 mm) |
| Coating Type | Hard-coated, ion-Assisted coating |
| Angle of Incidence (AOI) | 0° (normal incidence) |
| Durability | MIL-STD-810E, Method 507.3 compliant |
| Tempreture | -40℃- +60℃ |
1550nm Laser Line Filter FWHM 30nm Applications
- Fiber Optic Communication
In DWDM systems, 1550/30nm filters are used to separate or merge multiple optical signals near 1550nm, which can reduce channel crosstalk, increase transmission capacity, support single-fiber transmission of more than 80 signals, and reduce fiber laying costs. - Laser Sensing
1550nm laser matches the near-infrared weak absorption line of methane, and 1550/30nm filters can suppress ambient light noise - Biomedical Imaging
In 1310nm/1550nm imaging systems, 1550/30nm filters can suppress out-of-band noise of superluminescent diode light sources and improve axial resolution - Erbium-Doped Fiber Amplifiers
1550/30nm filters can filter out the backscattered noise of 980nm/1480nm pump lasers to ensure the purity of C-band 1530–1565nm signals.
