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    WAVEGUIDE OPTICAL INTERFEROMETER
    1.
    发明公开
    WAVEGUIDE OPTICAL INTERFEROMETER 有权
    光波导干涉仪

    公开(公告)号：EP1191364A4

    公开(公告)日：2005-01-05

    申请号：EP01902830

    申请日：2001-02-09

    申请人： NIPPON TELEGRAPH & TELEPHONE ,  NTT ELECTRONICS CORP

    发明人： INOUE YASUYUKI ,  HASHIZUME YASUAKI ,  HIBINO YOSHINORI ,  SUGITA AKIO ,  HIDA YASUHIRO ,  TAKAHASHI HIROSHI

    IPC分类号： G02B6/12 ,  G02B6/122 ,  G02B6/126 ,  G02B6/34

    CPC分类号： G02B6/12011 ,  G02B6/12023 ,  G02B6/126 ,  G02B2006/12159

    摘要： A waveguide optical interferometer which is free from an additional work and excessive loss of light which accompanies the insertion of a 1/2 wavelength plate, low in cost, has high reliability and is independent of polarization. In an optical multiplexer / demultiplexer such as an AWG, a Mach-Zehnder interferometer which utilizes interference of light beam passing through a plurality of optical waveguides of different lengths, all the integrals of the birefringence values of the optical waveguides (which may change or not change along the waveguides) in the longitudinal direction of the waveguides (201 and 202) are made to be equal to each other. Thus, polarization-independent operation can be realized and, to the contrary, a polarized beam splitter can be realized only by changing the waveguide widths. For instance, the core width averaged in the longitudinal directions of short optical waveguides out of the optical waveguides having different lengths is made wide, and the averaged core width of long optical waveguides is made narrow, thereby realizing polization independence.

    OPTICAL FUNCTIONAL CIRCUIT
    6.
    发明公开
    OPTICAL FUNCTIONAL CIRCUIT 有权
    OPTISCHE FUNKTIONSSCHALTUNG

    公开(公告)号：EP1764635A4

    公开(公告)日：2010-08-04

    申请号：EP05755862

    申请日：2005-07-01

    申请人： NIPPON TELEGRAPH & TELEPHONE

    发明人： KITOH TSUTOMU ,  SAKAMAKI YOHEI ,  HASHIMOTO TOSHIKAZU ,  SAIDA TAKASHI ,  TAKAHASHI HIROSHI ,  YANAGISAWA MASAHIRO ,  OGAWA IKUO ,  SHIBATA TOMOHIRO ,  SUZUKI SENICHI

    IPC分类号： G02B6/122 ,  G02B6/26

    CPC分类号： G02B6/122 ,  G02B6/125 ,  G02B2006/12119 ,  G02B2006/1213 ,  G02B2006/12147

    摘要： The present invention provides an optical functional circuit where a holographic wave propagation medium is applied and a circuit property is excellent such as small transmission loss and crosstalk. The optical functional circuit where a plurality of circuit elements are formed on a substrate includes the wave propagation medium for converting an optical path of a leakage light so that the leakage light that is not emitted from a predetermined output port of the circuit element is not coupled to a different circuit element. This wave propagation medium is constituted by an optical waveguide that is provided with a clad layer formed on the substrate and a core embedded in the clad layer, and a part of the optical waveguide is formed in accordance with a refractive index distribution which is multiple scattered.

    摘要翻译： 本发明提供一种全息波传播介质的光学功能电路，电路性能优良，例如传输损耗小，串扰小等优点。 在衬底上形成多个电路元件的光功能电路包括用于转换漏光的光路的波传播介质，使得不从电路元件的预定输出端口发射的漏光不耦合 到不同的电路元件。 该波传播介质由在基板上形成的包覆层和埋设在包覆层中的芯体的光波导构成，并且根据多个散射的折射率分布形成光波导的一部分 。

    INTERFEROMETER OPTICAL SWITCH AND VARIABLE OPTICAL ATTENUATOR
    10.
    发明公开
    INTERFEROMETER OPTICAL SWITCH AND VARIABLE OPTICAL ATTENUATOR 有权
    用干涉和可调光ABSCHWûCHER光开关

    公开(公告)号：EP1643302A4

    公开(公告)日：2007-11-07

    申请号：EP04747241

    申请日：2004-07-02

    申请人： NIPPON TELEGRAPH & TELEPHONE

    发明人： MIZUNO TAKAYUKI ,  TAKAHASHI HIROSHI ,  KITOH TSUTOMU ,  OGUMA MANABU ,  SOUMA SHUNICHI

    IPC分类号： G02F1/313 ,  G02B6/12 ,  G02B6/26

    CPC分类号： G02B6/266 ,  G02B6/12007 ,  G02F1/3136 ,  G02F2203/04

    摘要： An interference optical switch capable of switching in a wide band, having a high extension ratio and produced with a large production tolerance and an optical switch module. As optical multiplexing/demultiplexing means, a phase generation coupler (111) the output of which involves a phase difference having wavelength dependence is used. The total sum 2pi{phi1(lambda)+phiDeltaL(lambda)+phi2(lambda)} of the phase difference phi1(lambda) of the light outputted from the phase generation coupler (111), the phase difference phiDeltaL(lambda) due to the optical path length difference of an optical path length difference imparting section (131), and the phase differencephi2(lambda) of the light outputted from a directional coupler (153) is constant independently of wavelength. Thus, an interference optical switch independent of wavelength is realized.