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    • 2. 发明公开
    • Optical isolator utilizing a micro-resonator
    • Optischer Isolator mit einem Mikroresonator
    • EP1560048A1
    • 2005-08-03
    • EP04019597.6
    • 2004-08-18
    • Agilent Technologies, Inc.
    • Tan, Michael R.T.Trutna, WilliamBour, David P.Leary, Michael H.
    • G02B6/26H04B10/00
    • G02B6/29335G02B6/12007G02B6/2746G02B2006/12097G02B2006/12104G02F1/0955G02F2203/15
    • An optical isolator (10,20,200) for coupling light from a first waveguide to a second waveguide is disclosed. The optical isolator (10,20,200) utilizes a resonator (11,21,201) coupled to the first and second optical waveguides (12). The resonator (11,21,201) has a resonance at wavelength λ for light traveling from the first optical waveguide (13) to the second optical waveguide (12); however, the resonator (11,21,201) does not have a resonance at λ for light traveling from the second waveguide to the first waveguide. The resonator (11,21,201) can use a layer (22,275) of ferromagnetic material (15) in an applied magnetic field. The magnetic field within the ferromagnetic material (15) varies in strength and/or direction over the layer (22,275) of ferromagnetic material (15). The magnetic field can be generated by an external magnetic field that varies over the layer (22,275) of ferromagnetic material (15). Alternatively, the resonator (11,21,201) can include a layer (22,275) of ferromagnetic metal that overlies a portion of the layer (22,275) of ferromagnetic material (15) and a constant external magnetic field.
    • 公开了一种用于将来自第一波导的光耦合到第二波导的光隔离器(10,20,200)。 光隔离器(10,20,200)利用耦合到第一和第二光波导(12)的谐振器(11,21,201)。 谐振器(11,21,201)对于从第一光波导(13)传播到第二光波导(12)的光具有波长λ的共振。 然而,对于从第二波导传播到第一波导的光,谐振器(11,21,201)在λ处不具有共振。 谐振器(11,21,201)可以在施加的磁场中使用铁磁材料(15)的层(22,275)。 铁磁材料(15)内的磁场在铁磁材料(15)的层(22,275)上的强度和/或方向上变化。 磁场可以由在铁磁材料(15)的层(22,275)上变化的外部磁场产生。 或者,谐振器(11,21,201)可以包括铁磁金属的层(22,275),其覆盖铁磁材料(15)的层(22,275)的一部分和恒定的外部磁场。
    • 4. 发明公开
    • MONOCHROMATOR ARRANGEMENT
    • MONOCHROMATORANORDNUNG
    • EP1362225A1
    • 2003-11-19
    • EP01931481.4
    • 2001-02-23
    • TELEFONAKTIEBOLAGET LM ERICSSON
    • POPOV, Sergei
    • G01J3/12G02B6/34
    • G02B6/29335G01J3/12G02B6/4249
    • A monochromator arrangement for isolating or recombining a narrowband optical signal from a broadband signal is proposed. The arrangement has a body of rotational symmetry of a dispersive medium. In its simplest form the body is a cylinder with a continuous outer wall and two planar end surfaces. The outer wall may alternatively have a polygonal cross-section. The body forms a multi-reflective cavity, wherein a broadband optical signal entering the cavity through a planar end surface at an angle of incidence to the outer wall is repeatedly totally internally reflected off the outer wall. At least one exit point is provided in the outer wall for permitting egress of a spectral component. For recombination, narrowband optical signals are coupled into the body at different locations on the outer wall and propagated in substantially helical paths that converge at a planar surface. This arrangement permits the propagation path within the dispersive medium to be lengthened in a relatively compact space. The arrangement is simple to manufacture. It also has low insertion loss and, being devoid of mechanically movable parts, does not require fine adjustment or particularly careful handling.