3.Atenuador de fibra òptica

Fàbrica d'atenuadors de fibra òptica de la Xina

1. Per què cal un atenuador de fibra òptica

Si lluiteu amb massa llum saturant el vostre receptor de fibra òptica, atenuador de fibra òptica és el que redueix el nivell de potència d'un senyal òptic. Mitjançant l'ús d'atenuadors òptics, podeu aconseguir el millor rendiment del sistema de fibra òptica.

En general, hi ha dues situacions en què potser necessiteu atenuadors de fibra òptica al vostre sistema.

Quan necessiteu reduir la potència del receptor.

De vegades, el senyal que arriba al receptor és massa fort i pot dominar els elements receptors. Això pot ser causat per un desajust entre els transmissors i receptors o l'ús de convertidors de mitjans dissenyats per a una distància molt més llarga.. En aquest cas, you can install optical attenuators in the fiber optic link to reduce the signal power and properly match the signal level.

Where you may need attenuators is when testing power level margins.

During testing, attenuators can be temporarily added to the system to add a calibrated amount of signal loss and test power level margins in the fiber optic system. With the transmitter turned on and using a fiber optic power meter set to the system operating wavelength, you can use the attenuator to test the system power.

2. Types of Fiber Attenuator Fibconet Will Supply

Fiber optic attenuators come in many different forms. In the market, you can find different types of optical attenuators classified by connector type, cable type and more.

En general, they are grouped into fixed optical attenuators (FOA) and optical variable attenuators (VOA). You can also divide them into single-mode and multi-mode attenuators based on cable types.

Fixed Optical Attenuator

As the name suggests, fixed attenuators are designed to have an unchanging level of attenuation in optical fiber, typically between 1dB and 30dB. The preferred optical attenuators often use either doped fibers, misaligned splices, or total power, while non-preferred attenuators often use gap loss or reflective principles.

There are two types of fixed value attenuators: in-line type i tipus de connector. In-line type looks like a plain fiber patch cable, while connector type attenuator looks like a bulkhead fiber connector. These attenuators can be used in telecommunication networks, optical fiber test facilities, Xarxa d'àrea local (LAN) and CATV systems.

Optical Variable Attenuator

Optical variable attenuators, or variable optical attenuators (VOA), use a variable neutral density filter. They are generally use for testing and measurement, but they also widely adopt in Erbium-Doped Fiber Amplifier (EDFA) for equalizing the light power among different channels.

There are two types of optical variable attenuators: stepwise variable attenuators and continuously variable attenuators.

Stepwise variable attenuators can change the signal attenuation in known steps such as 0.1dB, 0.5dB, or 1dB.

Continuously variable optical attenuators can provide a precise level of attenuation through flexible adjustment.

This allows operators to adjust the attenuator quickly and precisely without any interruption to the circuit.

3. Fiber Optic Attenuator Principles and Structure