HCXtreme® 365 µm 0.22 NA Step-Index Multi-mode Optical Fibre
- Technology
- Speciality fibre
- Partner
- Lightera (formerly OFS)
The HCXtreme® 365 µm 0.22 NA step-index optical fibre is a specialty large-core multimode fibre designed for high-power laser applications in demanding environments. It features an all-silica core and cladding with a proprietary HCS® hard polymer coating that improves mechanical strength and resistance to long-term bending fatigue. A durable blue ETFE buffer protects the fibre and supports use in medical environments through biocompatible materials. The 365 µm core diameter and 0.22 NA enable efficient coupling of high-power laser beams and strong light throughput. Its low-OH silica construction helps maintain low attenuation from visible wavelengths into the near-infrared, up to around 2100 nm. The fibre is well suited to industrial laser processing, medical laser delivery, and other applications requiring robust, bend-tolerant optical power transmission.
Range features
A high level overview of what this range offers
- All-silica core and cladding – supports high damage threshold for demanding laser delivery applications.
- HCS® hard polymer coating – improves mechanical strength and helps resist breakage under tight bends.
- Blue ETFE buffer – provides a durable, biocompatible outer layer for medical and industrial environments.
- Large 365 µm core – enables easier coupling of high-power laser beams and strong optical throughput.
- 0.22 numerical aperture – offers a broad acceptance angle for simplified alignment.
- Low-OH silica design – supports efficient transmission into the near-infrared, up to approximately 2100 nm.
- Bend-tolerant construction – proven in testing to continue power delivery even at very tight bend conditions.
- Crimp & cleave compatible – supports straightforward termination and integration into laser systems.
- Wide operating temperature range – reliable from −65 to +125 °C.
- High proof test level – rated at ≥ 100 kpsi / 0.689 GPa for robust long-term reliability.
Downloads
for HCXtreme® 365 µm 0.22 NA Step-Index Multi-mode Optical Fibre
HCXtreme® 365 µm 0.22 NA Optical Fibre Datasheet (PDF)
DownloadWhat’s in this range?
All the variants in the range and a comparison of what they offer
Specification | Value |
Core Diameter | 365 ± 10 µm |
Cladding Diameter | 400 ± 10 µm |
Hard Coating Diameter | 430 ± 10 µm |
Buffer Diameter | 550 ± 30 µm |
Clad/Coating Offset | ≤ 9 µm |
Crimp & Cleave Compatible | Yes |
Buffer Material | ETFE |
Standard Buffer Colour | Blue |
Coating Material | HCS® |
Type | Multimode Step-Index |
Numerical Aperture (NA) | 0.22 |
Attenuation @ 850 nm | ≤ 10 dB/km |
Water Content | Low OH |
Operating Temperature | −65 to +125 °C |
Short-Term Bend Radius | ≥ 29 mm |
Long-Term Bend Radius | ≥ 47 mm |
Proof Test Level | ≥ 100 kpsi (0.689 GPa) |
Order by Part Number | F18940 |
Product Description Code | 365-22 HCXtreme |
FAQs
for HCXtreme® 365 µm 0.22 NA Step-Index Multi-mode Optical Fibre
The manufacturer does not state a strict maximum power level. The large 365 µm core and robust construction are intended for very high laser power delivery, but the practical limit depends on wavelength, coupling quality, end-face preparation, and bend conditions. The fibre has also been tested with high power at 2140 nm under an extreme 2.5 mm bend without failure, indicating strong power-handling capability.
For normal operation, the specified minimum bend radius is 29 mm short-term and 47 mm long-term. In internal testing, the fibre continued delivering power even at an extreme bend radius of about 2.5 mm, showing excellent bend tolerance. For best lifetime and reliability, it should still be used within the specified bend limits.
This fibre is designed to transmit light from the visible range into the near-infrared. Its low-OH silica construction supports efficient delivery of wavelengths such as 808 nm, 1064 nm, and up to approximately 2100 nm, making it suitable for a broad range of medical, industrial, and scientific laser systems.
Yes. The fibre is designed with medical applications in mind and uses biocompatible constituent materials, including the silica structure and blue ETFE buffer. This makes it suitable for integration into medical laser systems, although final device compliance, sterilisation, and regulatory approval depend on the finished assembly.
Yes. Because the fibre is crimp & cleave compatible, it can be stripped, cleaved, and terminated using suitable large-core connector hardware. Typical options may include appropriately sized SMA or ST-style connectors and ferrules intended for fibres around the 400 µm class.
A 365 µm core makes high-power laser coupling easier because alignment is less critical than with smaller cores. It also spreads optical power over a larger area, reducing power density and helping lower the risk of optical damage. In addition, the large multimode core is well suited to carrying energy from multimode or combined laser sources.
Typical uses include industrial laser welding, cutting, and materials processing, as well as medical laser delivery systems such as surgical, endoscopic, or dental devices. It is also suitable for scientific and R&D setups that require a durable large-core fibre for reliable transmission of high optical power.
