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1152nm Laser Line Filter FWHM 10nm For HeNe
1152nm Laser Line Filter FWHM 10nm is a hard coating optical narrow bandpass filter optimize for HeNe IR lasers.
- Special design for Hene IR laser
- Center wavelength 1152nm
- FWHM 10nm
- Blocking depth OD4
1152nm Laser Line Filter FWHM 10nm For HeNe Description
1152nm Laser Line Filter FWHM 10nm is a high-precision narrowband filter designed specifically for HeNe lasers. The central wavelength is 1151+/-2nm, which perfectly matches the infrared spectrum of HeNe lasers and covers its main mode radiation range (1140–1160nm). The half-bandwidth is 10+/-2nm, and the half-bandwidth of 0nm provides high spectral resolution, which can separate the main peak of the laser from the spontaneous emission noise. Highly transparent in the range of 1147-1157nm, with a transmittance greater than 80%. Ensure efficient capture of HeNe laser weak signals. Cut-off bands are 200-1200nm@OD4 & 1200-1700nm@OD3. Effectively filter out the visible light spurious of HeNe lasers such as 632.8nm red light and infrared background noise.
1152nm Laser Line Filter FWHM 10nm For HeNe Technical Datasheet
| Parameter | Specification |
| Center Wavelength (CWL) | 1152 nm ± 2 nm |
| Bandwidth (FWHM) | 10 nm ± 2 nm |
| Peak Transmission | ≥ 80% |
| Blocking Range | 200-1200nm@OD4, 1200-1700nm@OD3 |
| Suitable laser | HeNe 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℃ |
1152nm Laser Line Filter FWHM 10nm For HeNe Applications
- Methane (CH₄) and ammonia (NH₃) detection
There is a weak absorption line of CH₄/NH₃ near 1152nm. The 1152/10nm filter extracts the HeNe laser signal. Combined with the tunable diode laser absorption spectroscopy technology, it can be used for natural gas pipeline leakage monitoring - Raman spectroscopy
The 1152/10nm filter can filter out the 632.8nm visible light of the HeNe laser, retain the 1152nm infrared excitation light, improve the signal-to-noise ratio of the Raman signal, realize single-cell-level lipid molecular imaging, and assist in early cancer diagnosis research - Isotope analysis
There is a slight shift (~0.1nm) in the absorption peaks of different isotope molecules near 1152nm, such as ¹³CO₂/¹²CO₂. The 1152/10nm narrowband filter can be combined with a high-resolution spectrometer to separate the isotope signal. - Ophthalmology OCT
1152nm light has lower scattering in the cornea and vitreous body, and has better penetration depth than the 1310nm band. The 1152/10nm filter can present the structure of each layer of the retina in high definition, and diagnose glaucoma and macular degeneration at an early stage
