MiXran Meg1107 Narrowband Interference Filter (FWHM < 10 nm)

Overview

The MiXran Meg1107 is a high-performance narrowband interference filter engineered for precision spectral isolation in demanding optical instrumentation and laser-based laboratory systems. Based on multi-layer dielectric thin-film deposition technology, the Meg1107 utilizes hard-coated, ion-assisted e-beam evaporation to achieve exceptional wavelength selectivity with full-width at half-maximum (FWHM) bandwidths consistently below 10 nm. Its design adheres to fundamental principles of constructive and destructive interference in layered dielectric stacks, enabling high out-of-band rejection (optical density OD4–OD6 across UV–NIR) while maintaining >30% peak transmittance at specified center wavelengths (CWL). This performance profile makes the Meg1107 suitable for fluorescence excitation/detection, Raman spectroscopy, confocal microscopy, laser line cleanup, and atomic vapor absorption applications where spectral purity and signal-to-noise ratio are critical.

Key Features

• Ultra-narrow passband: FWHM ≤ 10 nm with tight CWL tolerances — ±0.5 nm for high-precision variants (e.g., GNIF-001 series) and ±0.7 nm for enhanced stability variants (e.g., GNIF-003 series)
• High transmission efficiency: ≥35% typical peak transmittance at CWL; up to ≥40% for longer-wavelength variants (546–632 nm), optimized via anti-reflection coating on substrate rear surface
• Robust optical architecture: Fused silica (Suprasil-grade) substrates with λ/4 surface flatness and <1 arcmin parallelism ensure minimal wavefront distortion in collimated beam paths
• Deep blocking performance: OD4 minimum from 200–1200 nm outside passband; OD6 achievable in key rejection regions (e.g., adjacent laser lines or plasma emission bands)
• Environmental durability: Hard-sputtered dielectric coatings withstand humidity, mild abrasion, and repeated cleaning with spectroscopic-grade solvents per ISO 10110-7 standards
• Standardized mechanical form factors: Available in two industry-standard diameters — 12.7 mm (0.5″) and 25.4 mm (1.0″) — with precision-ground edges and laser-etched product identification

Sample Compatibility & Compliance

The Meg1107 is compatible with standard optomechanical mounts (e.g., SM1- and SM2-threaded lens tubes, kinematic filter holders) and integrates seamlessly into OEM instruments requiring spectral filtering under controlled environmental conditions. All variants comply with ISO 9022-2 (optical component environmental testing), ISO 10110-7 (surface quality specifications), and RoHS 2015/863/EU directives. While not certified to FDA 21 CFR Part 11, the filter’s passive optical function and documented manufacturing traceability (batch-coded substrate lot numbers, coating run logs) support integration into GLP/GMP-aligned analytical platforms where hardware qualification is required. No electrical or software components are present; therefore, no EMC or functional safety certification applies.

Software & Data Management

As a passive optical component, the Meg1107 does not incorporate embedded electronics, firmware, or data interfaces. Its performance parameters — including CWL, FWHM, transmission curve, and blocking spectrum — are fully characterized pre-shipment using calibrated NIST-traceable spectrophotometry (PerkinElmer Lambda 1050+ with 150 mm integrating sphere). Full spectral data files (CSV and .SDF formats) and individual test reports are provided with each shipment. These documents include measurement uncertainty budgets compliant with ISO/IEC 17025:2017 Annex A.3 and may be imported into instrument calibration management systems (e.g., LabWare LIMS, Thermo Fisher SampleManager) for audit-ready traceability.

Applications

• Laser-based fluorescence microscopy: Isolating excitation lines (e.g., 488 nm argon-ion, 532 nm DPSS) while suppressing pump leakage and autofluorescence background
• Raman spectroscopy: Rejecting Rayleigh scatter and transmitting Stokes-shifted signals with minimal spectral broadening
• Atomic absorption spectroscopy: Selecting narrow resonance lines (e.g., Na D-line at 589 nm, Hg at 546 nm) in flame or graphite furnace AAS systems
• Optical coherence tomography (OCT): Enabling wavelength-swept source filtering or reference arm spectral conditioning
• Quantum optics experiments: Spectral purification of single-photon sources or cavity-enhanced detection channels
• OEM instrumentation: Embedded use in portable spectrometers, gas analyzers, and industrial process monitors requiring stable, field-deployable spectral filtering

FAQ

What is the maximum incident angle tolerance for optimal FWHM and CWL stability?
For collimated beams, the Meg1107 maintains specified FWHM and CWL shift ≤ ±0.3 nm up to 5° angle of incidence (AOI); beyond 5°, CWL blue-shifts predictably per thin-film interference theory — detailed AOI shift coefficients available upon request.
Can the Meg1107 be used with pulsed lasers?
Yes — validated for nanosecond-pulsed operation (1064 nm, 10 ns, 10 Hz, 0.5 J/cm²); for ultrafast (fs/ps) or high-repetition-rate (>1 kHz) applications, consult technical support for custom damage threshold verification.
Is custom center wavelength or FWHM available?
Yes — MiXran offers OEM customization of CWL (within 350–1100 nm range) and FWHM (down to 0.5 nm) with minimum order quantities; lead time and qualification protocols apply.
How is spectral uniformity across the aperture ensured?
Each batch undergoes full-aperture spectral mapping at three radial positions (center, 0.7r, edge) using a motorized stage and fiber-coupled spectrometer; uniformity deviation is reported in the certificate of conformance.
Do you provide mounting adapters or kinematic holders?
Standard unmounted filters are supplied; optional SM1-threaded retention rings (for 12.7 mm) and SM2-compatible cage plate mounts (for 25.4 mm) are available as accessories under separate part numbers.