Faraday rotator suitable for high-power opto-isolator

Abstract

The invention discloses a Faraday rotator suitable for a high-power opto-isolator. The Faraday rotator comprises a thermal compensation crystal, a half-wave plate, an iron ring, a first magnetic rotation crystal, a second magnetic rotation crystal, a first magnet and a second magnet. The first magnetic rotation crystal, the thermal compensation crystal, the half-wave plate and the second magnetic rotation crystal are laid out in the forward sequence of a Z axis, the iron ring is connected to the outside of the thermal compensation crystal and the outside of the half-wave plate in a sleeved mode, the first magnet is connected to the outside of the first magnetic rotation crystal in a sleeved mode, and the second magnet is connected to the outside of the second magnetic rotation crystal in a sleeved mode. When used for the opto-isolator, the Faraday rotator enables the opto-isolator to meet the requirement for high power of hundreds of watts and improves isolation degrees by at least 3dB.

Description

technical field [0001] The present invention relates to a Faraday rotator, more particularly, to a Faraday rotator used in an optical isolator with thermal compensation and polarization mode dispersion compensation characteristics. Background technique [0002] A fiber optic isolator is a passive optical device that only allows one-way light to pass through. Its working principle is based on the non-reciprocity of Faraday rotation. The echo reflection of light can be well suppressed by the optical isolator. Optical isolators mainly use the Faraday effect of magneto-optical crystals. The characteristics of the optical isolator are: low forward insertion loss, high reverse isolation, and high return loss. An optical isolator is a passive device that allows light to pass in one direction and prevents it from passing in the opposite direction. Its function is to limit the direction of light so that the light can only be transmitted in one direction. Very good isolation, impro...

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Problems solved by technology

[0004] In order to solve the long-term stable application of the existing Faraday rotator in the fiber isolator that cannot be used under high power conditions of 10W and above, the present invention designs a Faraday rotator with thermal compensation and polarization mode dispersion compensation characteristics

The invention solves the technical problem that the optical isolator cannot work stably under high-power conditions, is suitable for high-power spatial optical isolators and high-power optical fiber isolators, and can meet the use requirements of polarization-independent and polarization-dependent isolators under high-power conditions

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