Multifunctional high-power polarization preserving fiber isolator

Abstract

The invention discloses a multifunctional high-power polarization preserving fiber isolator. The multifunctional high-power polarization preserving fiber isolator is structurally characterized in that a first fiber collimation system, a double-window 90-degree beam splitting polarizer, a Faraday optical rotator, a birefringent crystal and a second fiber collimation system are arranged in sequence along the input direction of light, wherein the second fiber collimation system is arranged reversely; the included angle between the optical axis of the double-window 90-degree beam splitting polarizer and the optical axis of the birefringent crystal is 45 degrees; a third fiber collimation system and a fourth fiber collimation system are respectively arranged at double-window emergent parts at the two sides of the double-window 90-degree beam splitting polarizer. The multifunctional high-power polarization preserving fiber isolator not only can handle high-power input and output, but also has the characteristics of good heat stability and multiple functions; and the increase of monitoring ports is beneficial to stability and safety of the system, thereby achieving good practical applicability.

Description

technical field [0001] The invention relates to a novel optical fiber isolator, in particular to a multifunctional polarization-maintaining optical fiber isolator capable of carrying high-power input and output. It solves the poor thermal stability of the existing high-power isolator from the source, and adds a monitoring port to monitor the polarization characteristics, wavelength and return light power of the input light in real time without destroying the sealing of the entire fiber. After secondary development, it can be used in the construction of intelligent monitoring and protection systems for all-fiber high-power amplifiers. technical background [0002] In optical fiber communication, optical information processing, and all-fiber cascaded amplification systems, the stability of laser sources is crucial. However, in the system, the optical fiber and various functional components and their connections will encounter many inhomogeneous media such as optical interface...

AI Technical Summary

Problems solved by technology

Now there is no good way to observe the power and wavelength of the returned light, but monitoring the power and wavelength of the returned light is crucial to the safety of the entire fiber optic system

Especially in all-fiber cascaded amplifiers, effects such as stimulated Brillouin scattering (SBS) and spontaneous emission amplification (ASE) are prone to occur, and the return optical power in the post-stage amplification is too high or the wavelength is not within the working range of the isolator , the reverse amplification of the return light will have a catastrophic effect on the pre-amplifier, and the difficulty of monitoring the return light makes the entire cascaded amplifier a great safety hazard

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