| 摘要 |
An exemplary optical isolator, which may use a magnetic-composite material made of a ferromagnetic-composite, and method for making the same are provided. The optical isolator may include a core, a cladding, and a magnetic-composite material. The core is operable to allow a light wave incident a first end to propagate to a second end to define a positive propagation direction, and to allow a light wave incident the second end to propagate to the first end to define a negative propagation direction. The cladding is positioned relative the core and includes a thinned segment of the cladding with a cladding thickness operable to allow an optical field penetration through the thinned segment of the cladding by a light wave that propagates either in the positive or negative propagation direction. The thinned segment has a length that extends relative to a portion of the core. The magnetic-composite material is provided in the presence of a magnetic field, such as a static magnetic field, in a direction perpendicular to the positive propagation direction of the core, and is positioned relative the thinned segment to receive the optical field penetration through the thinned segment. The magnetic-composite material having a thickness and an index of refraction to attenuate a light wave that propagates in the portion of the core in the negative propagation direction more than the attenuation of a light wave that propagates in the portion of the core in the positive propagation direction.
|
