Feiyi OEO Optical Fiber Isolators: Essential Protection for Sensitive Light Sources
In sophisticated optical systems, protecting delicate laser sources and active components from harmful back-reflections is paramount to ensuring stability and longevity. Feiyi OEO’s range of Optical Fiber Isolators are precision passive components designed to provide high isolation, allowing light to travel in only one direction and effectively shielding sensitive elements from disruptive feedback.
Product Overview & Core Function
An optical fiber isolator is a non-reciprocal device that transmits light with low loss in the forward direction while blocking or heavily attenuating light propagating in the reverse direction. Feiyi OEO’s isolators are engineered to integrate seamlessly into fiber-optic links, acting as a critical safeguard to prevent destabilization, noise, and potential damage to lasers, amplifiers, and other active components caused by back-reflected or back-scattered light.
Key Features & Advantages
- High Isolation & Low Insertion Loss: Provides excellent reverse isolation (typically >40dB) to effectively block unwanted reflections, while maintaining minimal insertion loss in the forward path for optimal system efficiency.
- Polarization Sensitive & Insensitive Options: Offers both Polarization-Dependent Isolators (PDIs) for specific polarization-state applications and Polarization-Independent Isolators (PIIs) for use with unpolarized or varying polarization light.
- High Reliability & Stability: Built with robust materials and a stable design to ensure consistent performance across a wide operating temperature range and over extended periods.
- Compact & Fiber-Pigtailed Design: Features a compact package with standard single-mode or polarization-maintaining fiber pigtails, facilitating easy and low-loss integration into existing optical systems.
- Broad Wavelength Options: Available for common communication bands (e.g., 1310nm, 1550nm) and other specialized wavelengths upon request.
Key Specifications
| Parameter | Typical Specification / Description |
|---|---|
| Center Wavelength | 1310 nm, 1550 nm, or Custom |
| Isolation | > 40 dB (Higher grades available) |
| Insertion Loss | < 0.5 dB (Typical) |
| Return Loss | > 55 dB |
| Polarization Dependent Loss (PDL) | < 0.10 dB (For PIIs) |
| Operating Temperature Range | -5°C to +70°C (Standard) |
| Fiber Type | SMF-28e, PM Panda (Optional) |
| Package Dimension | Compact, Φ5.5mm x L40mm or Custom |
Primary Application Scenarios
- Laser Diode Protection: An essential component placed directly after a laser diode to protect it from back reflections originating from connectors, components, or the end of the fiber line.
- Optical Amplifier Systems: Used in Erbium-Doped Fiber Amplifier (EDFA) and Raman amplifier modules to prevent oscillations and ensure stable, noise-free amplification.
- Precision Test & Measurement: Incorporated into laboratory setups and instrument modules to eliminate interference from reflections, improving measurement accuracy for components like optical circulators and filters.
- Fiber Optic Sensing Systems: Enhances the signal stability and performance of high-coherence sensing systems by reducing noise from backscattering.
Conclusion
Feiyi OEO’s Optical Fiber Isolators provide a reliable and high-performance solution for managing optical feedback. Their excellent isolation characteristics, combined with low loss and robust construction, make them a fundamental component for improving the reliability, noise performance, and lifespan of lasers and complex optical systems across telecommunications, industrial, and research applications.