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The Characteristics Of The Fiber Optic Isolator
May 24, 2017

An opto-isolator is a passive optical device that allows only one-way light to pass through, and its working principle is based on non-reciprocity of Faraday rotation. The light reflected by the fiber echo can be well isolated by the Fiber Optic Isolator. The Fiber Optic Isolator mainly utilizes the Faraday effect of magneto-optic crystals. The characteristics of the Fiber Optic Isolator are: low positive insertion loss, high reverse isolation, and high return loss. An optoisolator is a passive device that allows the light to pass in one direction and prevents it from passing in the opposite direction. The effect is to limit the direction of the light so that the light can only be transmitted in one direction, and the light reflected by the fiber echo can be controlled by the Fiber Optic Isolator Good isolation, improve light transmission efficiency

Its role is to prevent the light path for a variety of reasons arising from the backward transmission of light on the light and the optical system

The adverse effects. For example, the installation of an Fiber Optic Isolator between the semiconductor laser source and the optical transmission system can greatly reduce the adverse effect of the reflected light on the spectral output power stability of the light source. In the high-speed direct modulation, direct detection of optical fiber communication system, the backward transmission of light will produce additional noise, the system performance degradation, which also need to eliminate the Fiber Optic Isolator. The Fiber Optic Isolator at both ends of the doped fiber in the fiber amplifier can improve the stability of the fiber amplifier. If it is not, the retroreflective light will enter the signal source (laser), causing the signal source to fluctuate violently. In a coherent optical long distance optical fiber communication system, the installation of an Fiber Optic Isolator at a distance can reduce the power loss caused by stimulated Brillouin scattering. Therefore, Fiber Optic Isolator play an important role in optical fiber communication, optical information processing systems, optical fiber sensing and precision optical measurement systems.

At present, the application of all-optical on-chip integration more. Now research is more about how to isolate Fiber Optic Isolator and on-chip COMS circuits.

Features

Fiber Optic Isolator are characterized by high isolation, low insertion loss, high reliability, high stability, extremely low polarization dependent loss and polarization mode dispersion.