Four-Sided Tapered Fiber Lens – Features & Applications

Overview
The four-sided tapered fiber lens, also known as a quadrangular pyramidal fiber lens, is a micro-optical component specially designed to optimize light coupling and beam shaping. With its compact geometry and high numerical aperture adjustment capability, it is widely used in advanced optical systems requiring high efficiency and miniaturization.

Key Features

• Compact size and short optical path

• High precision beam shaping

• Efficient coupling between fiber and laser diodes, photodetectors, or waveguides

• Ideal for mass production and easy packaging

Typical Applications

1. Medical Endoscopy

• Used in both rigid and flexible endoscopes to couple light efficiently into imaging fibers or illumination bundles.

• Enhances brightness and image clarity in minimally invasive surgical systems.

2. Optical Coherence Tomography (OCT)

• Enables precise light focusing in miniature OCT probes.

• Improves axial resolution and detection sensitivity.

3. Laser-to-Fiber Coupling

• Optimizes the beam shape from laser diodes (LD), DFB, SLD, or VCSEL sources.

• Reduces back-reflection and increases coupling efficiency, especially at 980nm or 1064nm wavelengths.

4. Optical Sensing

• Applied in fiber-optic sensors to collect or deliver light with high spatial accuracy.

• Suitable for temperature, pressure, or displacement measurement systems.

5. Telecommunications and Photonics Devices

• Supports efficient fiber-to-chip coupling in photonic integrated circuits (PICs) and planar lightwave circuits (PLCs).

6. Precision Optical Illumination

• Used in miniature illumination modules, offering uniform and focused light delivery.

7. Industrial Inspection and Machine Vision

• Delivers focused light into tight spaces for high-resolution inspection in semiconductor, electronics, and biomedical industries.