Establish whether the glass or coating changed
Coherent's NU0040 data sheet lists both 80 µm and 125 µm glass-cladding designs and specifies coating diameters separately. When a quotation says reduced diameter, identify the dimension being reduced. 1
A thinner coating may preserve the glass diameter. Reduced cladding changes the glass held, cleaved or fitted into a processing bore. Those changes require different compatibility reviews rather than one undefined thin-fiber designation.
This guide supports miniature components, onboard routing and high-density connection studies. It establishes no ARRANEX approval for arbitrary 80 µm processes or standard MPO options.
Keep drawing fields separate
| Field | Object described | Suggested RFQ detail | Often overlooked |
|---|---|---|---|
| Glass cladding | Outer glass boundary | Nominal, tolerance and fiber identity | Holder compatibility |
| Coating | Protective layer | Material, diameter and removal | Grip position and stripping scope |
| Mode-field diameter | Optical field at a wavelength | Full model and wavelength | Same glass size can differ |
| Ribbon or array pitch | Adjacent fiber centers | Structure and viewing datum | Smaller glass does not define pitch |
| Finished dimensions | Tube, boot and enclosure | Revision and assembly datums | Thin fiber does not shrink every part |
Two 80 µm designs in the Coherent sheet have different mode-field configurations. Equal glass diameter therefore resolves only part of mechanical fit, not optical transition behavior. 1
The sheet dates from 2020 and illustrates dimensional relationships. Obtain a current approved specification for procurement rather than generalizing its historical values or model-specific benefits.
Check each processing stage
NorthLab's ProCleave HS sheet separates its supported cladding range from coating compatibility, which depends on the fiber holder. The holder is not part of the standard delivery. A machine's diameter capability does not establish that the available tooling set is ready for the material. 2
| Stage | Suggested review | Evidence |
|---|---|---|
| Stripping | Glass, coating and material | Applicable tool and method |
| Holding | Holder, contact position and settings | Actual-material clamping validation |
| Cleaving | Diameter range, length and holder | End-face records for the material |
| Splicing | Both fibers, program and transition | Process approval and optical measurement |
| Termination | Bore, array location, adhesive and protection | Drawing, sample and finished results |
These are purchasing recommendations. Existing tools need not all be replaced, but retained tools require an applicability basis. Physical insertion is an initial fit check; glass condition, location and optical loss after processing remain separate acceptance tasks.
For ribbons and multifiber ferrules, also review pitch, alignment and protection. Do not scale an entire connector in proportion to one glass diameter or substitute fiber count for an assembly drawing.
Interpret the reported MPO transition carefully
The OFC 2021 M3C.3 abstract reports a ribbon-cable configuration using 80 µm cladding and 160 µm coating, including ribbon-splice evaluation and an MPO connection to 125 µm-cladding fiber. It is a demonstrated research configuration, not universal device or holder interchangeability. 3
A similar RFQ needs the complete fiber, ribbon structure, interfaces and transition locations. Request the supplier's actual delivery scope and validation evidence. Assess space savings from the complete drawing rather than glass diameter alone.
Procurement FAQ
- Does 80 µm mean core diameter? Here it means glass cladding. Read core, mode field and coating separately.
- Does a 200 µm coating imply reduced glass? No. Check cladding diameter independently.
- Are existing 125 µm tools necessarily unusable? Review the full tool/holder configuration and validate the actual material.
- Can every 80 µm fiber reuse the same splice settings? Match both complete fibers and their optical properties to an approved process.
- Can it become an ordinary MPO patch cord directly? Require termination, transition and sample evidence; a paper does not establish universal product compatibility.
Related products and reading
- Custom ferrule assemblies
- Optical shuffle fiber management
- 200 µm coating and MPO termination
- V-groove array pitch and datums
- Mode-field diameter and transitions
These product pages describe existing connectivity and cabling scopes. Confirm interfaces, materials and validation requirements for the actual project.
Contact an engineer
Prepare interface drawings, material specifications or existing test records and contact an engineer about assembly configuration and validation scope.
Sources and review date
- 1. Coherent reduced-cladding singlemode specification NU0040, 2020
- 2. NorthLab ProCleave HS diameter and holder scope
- 3. OFC 2021 reduced-cladding ribbon-cable research abstract M3C.3
Sources checked on 2026-10-27. Third-party references describe general technology, named products or research configurations, not ARRANEX performance, certification or supply. Procurement tables are editorial recommendations; use approved project documents for testing and acceptance.
Sources checked: 2026-10-27