150mm Bending Insensitive G652D Single-Mode Fiber Preform
Opticlumos specializes in bending insensitive G652D single-mode fiber preforms. Engineered to meet ITUT G652D and ITUT G.657.A1 standards, our preforms deliver consistent performance for high-end optical network deployments.
1. Basic Geometrical Characteristics
| Effective Part Length (Leffective) | 1500 ~ 2400mm (95% ≥ 2200mm) |
| Total Length (Ltotal) | ≤ 3300mm |
| Average Outer Diameter | 145 ~ 155mm |
| Outer Diameter Fluctuations (Within Preform) | ≤ 10mm |
| Non-Circularity Error | ≤ 0.6% |
2. Unusual Appearance & Quality Standards
Our strict quality control defines the "unusual part" based on the following criteria:
| Items | Specifications |
|---|---|
| Bubbles in Core Portion | > 0.5mm marked as unusual; clustered bubbles (<15mm gap) merged for length calculation |
| Bubbles in Cladding Portion | > 2.4mm marked as unusual; clustered bubbles merged |
| Impurities | Not allowed; treated as unusual portion in length |
| Surface Scratches | > 0.5mm depth or > 10mm length marked as unusual |
3. Expected Fiber Characteristics (Table 3)
| Parameter | Value | Measurement Standard |
|---|---|---|
| Attenuation @1310nm / @1550nm | ≤0.34 / ≤0.20 dB/km | TIA FOTP 78 / IEC 60793-1-40 |
| Cable Cut-off Wavelength | ≤ 1260 nm | TIA FOTP 80 / IEC 60793-1-44 |
| Mode Field Diameter @1310nm | 8.8 ~ 9.6 µm | TIA FOTP 191 / IEC 60793-1-45 |
| Zero Dispersion Wavelength | 1300 ~ 1324 nm | TIA FOTP 175 / IEC 60793-1-42 |
| Cladding Non-Circularity | ≤ 0.8% | TIA FOTP 176 / IEC 60793-1-20 |
4. Usable Weight Calculation
The chargeable weight is calculated based on a quartz glass density of 2.2g/cm³. Our precise calculation method ensures fair billing based on the actual usable preform length (Lcha), excluding defects.
Formula: W = (π/4) × OD_avg² × Lcha × (2.2/100) g
FAQ
What shapes of quartz glass incoming materials can Opticlumos process for custom preforms?
Leveraging our comprehensive special optical fiber manufacturing platform, we can process an extensive range of geometric profiles. Our deep hole drilling and special-shaped slotting technologies effortlessly accommodate round, square, rectangular, and regular polygon bars. Furthermore, our advanced plane polishing technology has absolutely no limits on the shape of incoming materials, empowering true bespoke structural solutions for your sensing and aerospace applications.
What is the maximum precision and depth achievable with your deep hole drilling technology?
For complex designs such as photonic crystal fiber and multi-core preforms, we guarantee industry-leading tolerances. Our drilling depth spans from 1mm up to 550mm (varying by specific pore size), with a remarkable minimum hole spacing of just 1mm. Throughout the process, we maintain strict geometrical control, including a hole out-of-roundness of ≤ 0.01mm and a precision accuracy error of ± 0.05mm during slotting.
Can you manufacture multi-faceted preforms for active doping and specialty fiber applications?
Absolutely. Our advanced plane polishing technology is engineered to machine anywhere from 1 to 16 distinct polygon faces on a single preform. This capability is ideal for fabricating elliptical core fibers and active doping prefabricated rods. Additionally, our cylindrical polishing technology ensures a flawless optical interface with an exceptional surface roughness of Ra ≤ 0.10 μm, maximizing signal integrity.