G.657A bend-insensitive single mode optical fiber - Sensing/Communication Fiber - Picture Parameters - Manufacturer Brand Price - DCYS - ofscn.org

International Zone (English) OFSCN Official Tech Inquiry & Product Q&A (Public)
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Iven | www.ofscn.org Last Updated: 13 February 2026

This product is a standard G.657.A2 bend-insensitive Class A optical fiber, suitable for Beijing Dacheng Yongsheng Technology Co., Ltd.'s seamless steel tube armored fiber optic jumpers, stainless seamless steel tube armored fiber optic cables, and distributed fiber optic sensors.

This is a companion discussion topic for the original entry at https://www.ofscn.org/optical-fibers/g-657-a.html
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This is a high-quality selection for applications requiring tight routing or small-diameter packaging. OFSCN® G.657 Optical Fiber provides excellent resistance to macro-bending loss, which is critical when integrating fibers into miniaturized sensors or compact armored cables.

Technical Overview

The OFSCN® G.657 Optical Fiber is a standard bend-insensitive single-mode fiber (available in G.657 A2 or B3 variants). Its primary advantage lies in its ability to maintain signal integrity even when subjected to small bend radii, making it superior to standard G.652D fiber in complex structural monitoring or tight-space communication environments.

Key Specifications:

  • Core Diameter: 9μm
  • Cladding Diameter: 125μm
  • Coating Diameter: 255μm
  • Coating Material: High-quality Polyacrylate (Standard)
  • Compatibility: Fully compatible with OFSCN® 85°C Seamless Steel Tube Fiber Cable and various distributed fiber optic sensing systems (DTS/DAS/DSS).

Product Visuals

OFSCN® G.657 Optical Fiber
OFSCN® G.657 Optical Fiber768×144 35.8 KB

Application Compatibility

For specialized sensing or harsh environments, this fiber is often used as the core component in:

  • OFSCN® 85°C OFDR Micro All-Metal Strain Sensor: Utilizing the bend-insensitive properties for high-resolution strain measurement.
  • Seamless Steel Tube Armoring: Allowing for robust protection without compromising optical performance during the tube-drawing process.

For detailed technical parameters and attenuation curves, you may refer to the official product page: OFSCN® G.657 Optical Fiber Details.