OETECH NOBF-06-150121 Hollow-Core Nested Antiresonant Fiber

Overview

The OETECH NOBF-06-150121 is a hollow-core nested antiresonant optical fiber engineered for high-fidelity guidance of ultrashort pulses and high-peak-power laser radiation in the near-infrared spectral region. Unlike conventional solid-core fibers, this design confines light within an air-filled central core via a multi-ring cladding structure that exploits antiresonant reflection—where guided modes are suppressed at wavelengths satisfying destructive interference conditions across the silica capillaries surrounding the core. This physical principle enables propagation with intrinsically low nonlinearity, reduced dispersion slope, and enhanced resistance to optical damage—critical attributes for applications demanding temporal fidelity and power scalability. The fiber operates across an experimentally verified transmission window from 820 nm to 1120 nm, making it particularly suitable for Yb-doped fiber amplifier systems, Ti:sapphire oscillator output delivery, and gas-phase nonlinear optics where minimal interaction between light and glass matrix is essential.

Key Features

• Engineered hollow-core architecture utilizing nested antiresonant tube geometry for robust mode confinement and broadband guidance
• Ultra-low nonlinear coefficient (γ < 0.1 W⁻¹km⁻¹) due to dominant air-guided propagation, minimizing self-phase modulation and spectral broadening
• Dispersion profile optimized for near-zero group velocity dispersion (GVD) across 1030–1080 nm, supporting sub-100-fs pulse delivery without external compensation
• High laser-induced damage threshold (>10 GW/cm² for 100-fs, 1064-nm pulses), validated under controlled cleanroom handling and fusion splicing conditions
• Single-mode-like output beam quality (M² < 1.3) achieved through precise control of higher-order mode cutoff via nested capillary spacing and wall thickness uniformity
• Fused silica base material with single acrylate coating ensures mechanical reliability (proof test > 100 kpsi) and compatibility with standard fiber processing tools

Sample Compatibility & Compliance

The NOBF-06-150121 meets internationally recognized fabrication benchmarks for specialty photonic crystal fibers, including dimensional tolerance compliance per IEC 60793-2-40 (Category A4 for microstructured fibers). Its all-silica construction and hermetic coating ensure long-term stability under ambient humidity and thermal cycling (−40 °C to +85 °C). While not certified to ITU-T G.652 or G.657 standards—given its non-standard waveguide geometry—the fiber has been successfully integrated into Class 1 laser safety-compliant systems per IEC 60825-1 and supports traceable calibration workflows aligned with ISO/IEC 17025 requirements when used in metrology-grade setups. It is compatible with commercial fusion splicers equipped with hollow-core alignment routines and supports low-loss butt-coupling (<0.5 dB) to standard SMF-28 via optimized mode-field adapters.

Software & Data Management

Although the NOBF-06-150121 is a passive waveguide component, its integration into automated laser delivery platforms benefits from interoperability with industry-standard control ecosystems. When paired with motorized stage controllers (e.g., Thorlabs Kinesis, Newport ESP300), real-time alignment optimization can be scripted using Python-based APIs (PyVISA, LabVIEW .NET interop). Optical performance data—including spectral loss maps, polarization extinction ratio (PER), and bend-induced loss profiles—is routinely archived in HDF5 format for traceability. For regulatory environments requiring audit trails (e.g., GLP-compliant gas sensing deployments), metadata tagging follows FAIR principles, and raw measurement logs comply with FDA 21 CFR Part 11 electronic record guidelines when hosted on validated network storage.

Applications

• Delivery of high-energy femtosecond pulses from amplified Ti:sapphire and Yb-fiber laser systems without nonlinear distortion or pulse compression artifacts
• Gas-filled hollow-core platforms for stimulated Raman scattering, high-harmonic generation, and cavity-enhanced absorption spectroscopy in the NIR
• Low-latency, dispersion-stabilized links in free-space optical communications testbeds operating at 1030–1080 nm
• Reference arms in interferometric fiber sensors where phase stability and environmental insensitivity are critical
• Beam transport in ultrafast pump-probe experiments requiring spatial mode purity and temporal pulse integrity

FAQ

What is the recommended bending radius for reliable operation?
Minimum long-term bend radius is 12 cm; short-term bends down to 8 cm are permissible with <0.1 dB additional loss at 1064 nm.
Can this fiber be spliced to standard single-mode fiber?
Yes—using core-alignment fusion splicers with hollow-core mode-matching algorithms; typical splice loss is 0.3–0.6 dB with proper cleave quality and arc parameter tuning.
Is the fiber compatible with UV or mid-IR extension beyond the specified band?
No—transmission drops sharply below 820 nm due to increased OH absorption and above 1120 nm owing to higher-order antiresonance leakage; extended bands require custom capillary geometry.
Does OETECH provide characterization reports with each shipment?
Yes—each coil includes a certificate of conformance listing measured attenuation spectrum, cut-off wavelength, numerical aperture, and proof-test results.
Are custom lengths or coating variants available?
Yes—OETECH offers OEM reels from 1 m to 100 m, dual-acrylate or polyimide coatings, and connectorized versions (FC/APC, SMA905) upon request.