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Oblique Wedged-Shaped Lensed Fiber

Oblique Wedged-Shaped Lensed Fiber

Wedged-Shaped Lensed Fiber

Oblique Wedged-Shaped Lensed Fiber

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No.Parameter NameSpecificationTypical ValueTolerance
1Fiber TypeSM/MM/PM/Customized   FiberN/AN/A
2Fiber Length (L)Specified by customerN/AN/A
3Fiber Outer Diameter   (D1)100μm~900μmN/AN/A
4Bare Fiber Diameter   (D2)60μm~600μmN/AN/A
5Taper Angle (A3)70°~165°75°/90°/100°Typical: ±3°
6Taper Radius (R)3μm~50μm5μm~12μm±1μm
7Oblique Angle (A2)8°/Customized8°±1°
8Bevel Width (H)15μm/Customized15μm±5μm
9Bevel Angle (A1)35°~80°45°±2°
10Stripping Length (SL)10mm/Customized10mm±0.5mm
11

Connector Key   Orientation

 (for PM fibers)

Customized to match   key directionN/A±5°
12PM Fiber Orientation   (for PM fibers)Aligned with   axis/perpendicular to axisN/A±5°
13Connector (Optional)FC/PC;   FC/APC/CustomizedN/AN/A
14Protection Tubing   (Optional)900μm colored tubing900μm white tubingN/A
15AR Coating (Optional)R<0.2%@Specified   WavelengthR<0.2%N/A
16Bare Fiber   Metallization (Optional)Metal Layer   Thickness: 3~4μmN/AN/A

Features:

  1. Elliptical light spot

  2. Anti-reflection light application

Application: 

980nm semiconductor laser

The output beam of an LD chip coupled at the 980nm wavelength typically has an elliptical light spot. The ratio of the major to minor axes of this ellipse is generally proportional to the output power, usually ranging from 3 to 5. For high-power LDs, this ratio can exceed 10 and may even reach over 50 in extreme cases.

Obviously, such a beam is difficult to couple into an optical fiber. To accommodate the shape of the LD output beam, a wedge-shaped fiber lens can be used. By aligning the two large wedge surfaces with the direction of the larger divergence angle of the LD, the coupling efficiency of the LD light into the fiber can be significantly improved.


         


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