780nm Notch Filter: Deep Laser Blocking for Spectroscopy & Imaging | OPTOStokes
The OPTOStokes 780nm Notch Filter is engineered to deliver superior spectral performance, providing **ultra-deep blocking** of laser lines while maintaining high transmission efficiency in adjacent spectral bands. This filter is an essential component for system integrators and researchers requiring precision control over 780 nm interference in sensitive optical platforms like Raman spectroscopy, fluorescence detection, and laser-based imaging.
Technical Specifications
| Parameter | Specification |
|---|---|
| Center Wavelength ($\lambda$0) | 780 nm |
| High OD Filter Blocking Level | OD ≥ 6 (Typical) |
| Stopband Width (Block Width) | 160 nm (e.g., 675 nm - 835 nm) |
| High Transmission Ranges | 425 nm - 625 nm (T > 90%); 825 nm - 900 nm (T > 90%) |
| Thickness | 0.3 mm (Available in 0.5 mm, 1.0 mm, and custom thickness) |
| Surface Quality (S/D) | 60/40 scratch-dig (Tighter specifications available upon request) |
Engineered for Precision Laser Signal Clean-up
This notch optical filter is designed to create a very narrow, deep notch at the 780 nm region, effectively eliminating interference caused by 780 nm laser sources or strong ambient background light. The OD ≥ 6 blocking capability translates to less than 0.0001% light transmission across the stopband, ensuring that unwanted laser energy is attenuated near-completely, protecting sensitive detectors from saturation or damage.
The fast transition from the blocking band to the high-transmission sidebands ensures maximum collection of critical signal light, which is preserved at T > 90% in both the visible (425 nm - 625 nm) and near-infrared (825 nm - 900 nm) regions.
Key Advantages for System Integration
- Ultra-Deep Laser Blocking Filter: Guaranteed OD ≥ 6 rejection across the 780 nm band for near-perfect signal-to-noise ratio.
- High Signal Throughput: Exceptional transmission (> 90%) in adjacent regions preserves the maximum available signal from your sample or source.
- Slim Profile Design: The standard 0.3 mm thickness is ideal for space-constrained optical setups, micro-systems, and integration into existing filter cubes.
- Quality Coating Technology: 60/40 surface quality minimizes scattered light, maintaining the high spatial and spectral integrity required by advanced imaging systems.
Core Applications
- Raman Spectroscopy: Crucial for blocking the 780 nm excitation laser line while efficiently collecting the resulting Stokes and Anti-Stokes shift signals.
- Biomedical Imaging & Microscopy: Removes 780 nm pump or background interference from fluorescence signals, particularly in multi-band systems that utilize 780 nm for auxiliary purposes.
- Custom Laser Systems: Used in OEM integration where high isolation of specific diode laser wavelengths is required for system stability and detector protection.
Stock Availability & Custom Optical Filter Options
The 0.3 mm thickness and standard sizes of our **780nm Notch Filters** are kept in ready inventory to meet your urgent prototyping and production needs, ensuring precision manufacturing and quick turnaround.
For unique integration requirements, OPTOStokes specializes in high-level custom coatings and form factors. We support custom dimensions (circular, square, rectangular, and irregular shapes) and can provide optional lens mounts or laser marking for seamless system integration and easy identification.
Why Partner with OPTOStokes?
OPTOStokes provides high-quality optical solutions built on decades of experience in demanding markets. We guarantee product quality, predictable lead times, and expert technical support for every project—from stock orders to complex OEM partnerships. Trust us for reliable 780 nm interference control.
Ready to specify your project or need technical confirmation?
Contact our technical sales team for immediate stock quotes, detailed spectral data, or to start your custom design project:
Email: sales@optofilters.com | Website: www.optokens.com
