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1. 发明授权

US5082349A Bi-domain two-mode single crystal fiber devices 失效
标题翻译：双域双模单晶光纤器件
公开(公告)号：US5082349A
公开(公告)日：1992-01-21
申请号：US541091
申请日：1990-06-20
申请人： Amado Cordova-Plaza , Herbert J. Shaw
发明人： Amado Cordova-Plaza , Herbert J. Shaw
IPC分类号： G02F1/035 , G02F1/377
CPC分类号： G02F1/3775 , G02F1/0353
摘要： A mode converter comprises an a-axis LiNbO.sub.3 optical fiber exhibiting a ferroelectric bi-domain structure. The fiber is subject to an electrical field that induces a +.pi./2 phase retardation in one domain of the fiber and a -.pi./2 phase retardation in the other domain. A light signal launched in the fundamental mode of the fiber is converted into a light signal propagating in the second order mode. When the electrical field is selected so that the phase retardations are not multiples of .pi./2, the mode conversion is partial and the LiNbO.sub.3 fiber can operate as an optical switch or as an amplitude modulator. The mode converter can also be operated as a second harmonic generator. The fiber is heated to a phase matching temperature so that a signal launched in the fundamental mode of the fiber and at a frequency .omega. is converted to the second order mode at a frequency 2.omega.. The LiNbO.sub.3 fiber can also simultaneously operate as an optical switch and as a second harmonic generator. Other non-linear interactions are possible such as sum or difference frequency generation or parametric generation. The various embodiments of the present invention are reciprocal.
摘要翻译：模式转换器包括呈现铁电双畴结构的a轴LiNbO 3光纤。纤维经受电场，其在纤维的一个区域中引起+π/ 2相位延迟，并在另一个域中引起a-π/ 2相位延迟。以光纤的基本模式发射的光信号被转换成以二阶模式传播的光信号。当选择电场使得相位延迟不是pi / 2的倍数时，模式转换是部分的，并且LiNbO 3光纤可以作为光开关或调幅器工作。模式转换器也可以作为二次谐波发生器运行。将光纤加热到相位匹配温度，使得以光纤的基本模式发射的信号以频率ω被转换为频率为2ω的二阶模式。 LiNbO3光纤也可以作为光开关和二次谐波发生器同时工作。其他非线性相互作用是可能的，例如和或差频产生或参数生成。本发明的各种实施例是相互的。

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