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Communication Optical Fibre

0.25mm Bare Optical Fiber,G657A2 fiber,G657A2 optical fiber

0.25mm 0.27mm G657A2 Ultra-Thin Fiber For FPV Drones

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As FPV drones evolve from recreational tools to mission-critical assets in defense, industrial inspection, and cinematography, GL-FIBER's 0.25mm/0.27mm G657A2 Ultra-Thin Fiber delivers unmatched performance where conventional cables fail. Combining revolutionary miniaturization with military-grade resilience, this fiber redefines long-range, jamming-proof drone operations.


0.25mm/0.27mm G657A2 Ultra-Thin Fiber: Precision Engineered for FPV Drone Dominance.

0.25mm Bare Optical Fiber,G657A2 fiber,G657A2 optical fiber

Standard

The fiber complie with or exceed the technical specifications in ITU-T G.657.A1/A2/B2.

Main Features

 Minimum bend radius 7.5mm, superior anti-bending property;
 Fully compatible with G.652 single-mode fiber. Full band (1260～1626nm) transmission;
 Low PMD for high bit-rate and long distance transmission. Extremely low micro-bending attenuation, applicable for all optical cable types including ribbons;
 High anti-fatigue parameter ensures service life under small bending radius.

Customization & Scalability

✅ Lengths: 1/2/3/5/10/15/20/30/40km spools
✅ Diameters: 0.25mm, 0.27mm, 0.35mm, 0.5mm
✅ Reels: 25.2KM or 50.4KM industrial packaging
✅ Jackets: PVC/LSZH/TPU for chemical/UV resistance

Backed by 21 years of optical fiber expertise and ISO 9001 certification.

Application

All cable constructions, 1260～1626nm full band transmission, FTTH high speed optical routing, optical cable in small bend radius, small-size optical fiber cable and device, L-band.

Technical Specifications

Characteristics

Conditions

Specified values

Units

Optical Characteristics





Attenuation

1310nm

≤0.35

[dB/km]

1383nm(after H2-aging)

≤0.35

[dB/km]

1460nm

≤0.25

[dB/km]

1490nm

≤0.23

[dB/km]

1550nm

≤0.21

[dB/km]

1625nm

≤0.23

[dB/km]

Attenuation vs. Wavelength

Max. α difference

1285-1330nm, in reference to 1310nm

≤0.03

[dB/km]

1525-1575nm, in reference to 1550nm

≤0.02

[dB/km]

Zero Dispersion Wavelength(λ0)

--

1300-1324

[nm]

Zero Dispersion Slope(S0)

--

≤0.092

[ps/(nm2·km)]

PMD

Maximum Individual Fibre

--

≤0.1

[ps/√km]

Link Design Value（M=20，Q=0.01%)

--

≤0.06

[ps/√km]

Typical Value

--

0.04

[ps/√km]

Cable Cutoff Wavelength (λCC)

--

≤1260

[nm]

Mode Field Diameter（MFD）

1310nm

8.4-9.2

[μm]

1550nm

9.3-10.3

[μm]

Effective Group Index of Refraction（Neff）

1310nm

1.466

--

1550nm

1.467

--

Point Discontinuities

1310nm

≤0.05

[dB]

1550nm

≤0.05

[dB]

Geometrical Characteristics

Cladding Diameter

--

125.0±0.7

[μm]

Cladding Non-Circularity

--

≤0.7

[%]

Coating Diameter

--

235-245

[μm]

Coating-Cladding Concentricity Error

--

≤12.0

[μm]

Coating Non-Circularity

--

≤6.0

[%]

Core-Cladding Concentricity Error

--

≤0.5

[μm]

Curl(radius)

--

≥4

[m]

Delivery Length

--

Up to 50.4

[km/reel]

Environmental Characteristics

1310nm, 1550nm & 1625nm

Temperature Dependence Induced Attenuation

-60℃ to +85℃

≤0.05

[dB/km]

Temperature-Humidity Cycling Induced Attenuation

-10°C to +85°C, 98% RH

≤0.05

[dB/km]

Watersoak Dependence Induced Attenuation

23°C, for 30 days

≤0.05

[dB/km]

Damp Heat Dependence Induced Attenuation

85°C and 85% RH, for 30 days

≤0.05

[dB/km]

Dry Heat Aging

85℃, for 30 days

≤0.05

[dB/km]

Mechanical Specification


Proof Test

--

≥9.0

[N]

--

≥1.0

[%]

--

≥100

[kpsi]

Macro-bend Induced Attenuation

10 Turns Around a Mandrel of 15 mm Radius

1550nm

≤0.03

[dB]

10 Turns Around a Mandrel of 15 mm Radius

1625nm

≤0.1

[dB]

1 Turn Around a Mandrel of 10 mm Radius

1550nm

≤0.1

[dB]

1 Turn Around a Mandrel of 10 mm Radius

1625nm

≤0.2

[dB]

1 Turn Around a Mandrel of 7.5 mm Radius

1550nm

≤0.5

[dB]

1 Turn Around a Mandrel of 7.5 mm Radius

1625nm

≤1.0

[dB]

Coating Strip Force

typical average force

1.5

[N]

peak force

1.3-8.9

[N]

Dynamic Fatigue Parameter(nd)

--

≥20

--

Why Choose G657A2 for FPV Drones?

1️⃣ Space-Optimized Design
  • 0.25mm/0.27mm diameter (thinner than human hair) enables seamless integration into micro-gimbals and robotic joints.
  • 7.5mm bend radius withstands 180° twists with <0.03dB loss at 1550nm.

2️⃣ Battlefield-Ready Durability
  • 500N tensile strength (aramid-reinforced) survives Arctic storms, desert heat, and shock impacts.
  • -60°C to +85°C operational range with IP68 waterproofing for extreme environments.

3️⃣ Unbreakable Signal Integrity
  • 30km real-time HD video transmission at ≤0.22dB/km attenuation (1550nm).
  • EMI-immune dielectric design defeats 5G/electronic warfare interference – critical in contested airspace.

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Please send us your detailed requirements, We will give you a valid quotation within 12 hours!

0.25mm Bare Optical Fiber,G657A2 fiber,G657A2 optical fiber

Hunan GL Technology Co., Ltd

  • Head Office In Hunan
    No.55, Zhaohuilu Road, Yuhua District, Changsha, Hunan, P.R.China.
  • Facilities In Wuhan
    Road Shenglong, Economic and technological development zone. Wuhan, P. R.China.430056
  • Facilities In Jiangsu
    No.128, Xingtang Road, Luotang Street, Jiangyan District, Taizhou City, Jiangshu, China.
  • +86 731 89722704
  • 8619330899962
  • sales@gl-fibercable.com

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