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    • 31. 发明申请
    • BISMUTH-SUBSTITUTED RARE-EARTH IRON GARNET CRYSTAL FILM AND OPTICAL ISOLATOR
    • BISMUTH取代的稀土红宝石晶体膜和光学隔离器
    • US20130224520A1
    • 2013-08-29
    • US13884363
    • 2011-11-10
    • Shuuji OosumiYasutaka NomiNobuo NakamuraHiroshi HatanakaTomio Kajigaya
    • Shuuji OosumiYasutaka NomiNobuo NakamuraHiroshi HatanakaTomio Kajigaya
    • C30B29/34G02B1/02
    • C30B29/34C30B19/12C30B29/28G02B1/02G02F1/0036G02F1/093
    • [Object] To provide a bismuth-substituted rare-earth iron garnet crystal film (RIG) which has an insertion loss of less than 0.6 dB and which can be produced in a high yield, as well as an optical isolator.[Solving means] Provided is a bismuth-substituted rare-earth iron garnet crystal film which is grown by liquid phase epitaxy on a non-magnetic garnet substrate represented by a chemical formula of Gd3(ScGa)5O12, wherein the RIG is represented by a chemical formula of Nd3-x-yGdxBiyFe5O12, and x and y satisfy 0.89×1.43 and 0.85≦y≦1.19. In contrast to conventional RIGs, the RIG represented by the chemical formula of Nd3-x-yGdxBiyFe5O12 of the present invention has an insertion loss of less than 0.6 dB and makes it possible to reduce the amount of heat generated because of absorption of light at wavelengths of about 1 μm. Hence, the RIG has such a remarkable effect that the RIG can be used as a Faraday rotator used for an optical isolator in a high-power laser device for processing.
    • 本发明提供一种铋取代的稀土铁石榴石晶体膜(RIG),其具有小于0.6dB的插入损耗并且可以以高产率生产,以及光隔离器。 [解决方案]提供一种铋取代的稀土铁石榴石晶体膜,其通过液相外延在由化学式Gd 3(ScGa)5 O 12表示的非磁性石榴石基材上生长,其中RIG由 Nd3-x-yGdxBiyFe5O12的化学式,x和y满足0.89×1.43和0.85 @ y @ 1.19。 与传统的RIG相反,本发明的Nd3-x-yGdxBiyFe5O12的化学式表示的RIG具有小于0.6dB的插入损耗,并且可以减少由于波长吸收光而产生的热量 约1 mum。 因此,RIG具有如此显着的效果,RIG可用作用于高功率激光装置中用于光隔离器的法拉第旋转器用于处理。
    • 35. 发明授权
    • Digital signal processing apparatus
    • 数字信号处理装置
    • US06473822B1
    • 2002-10-29
    • US09309433
    • 1999-05-11
    • Akira NakamatsuTakao AbeNobuo Nakamura
    • Akira NakamatsuTakao AbeNobuo Nakamura
    • G06F1300
    • H04N21/4143H04N7/24
    • A digital signal processing apparatus for processing a plurality of video signals and a plurality of audio signals is provided, and comprises a computer comprising a system bus and a main CPU connected to the system bus and an extension processor comprising a plurality of signal processing circuits for processing the plurality of video signals and/or the plurality of audio signals, and a local CPU for controlling the plurality of signal processing circuits so as to allow for the processing of the video signals and audio signals in real time. The extension processor further comprises an extension system bus extended from the system bus, a digital audio video (DAV) bus for transmitting the plurality of video signals and the plurality of audio signals between the plurality of signal processing circuits and a local CPU bus for transmitting control signals outputted from the local CPU. Each processing circuit has a common interface which is capable of being connected to the extension system bus, the DAV bus and the local CPU bus in any position, thereby allowing for the processing of the video signals and audio signals regardless of the mounting positions of the processing circuits.
    • 提供了一种用于处理多个视频信号和多个音频信号的数字信号处理装置,包括一个计算机,该计算机包括连接到系统总线的系统总线和主CPU,以及一个扩展处理器,包括多个信号处理电路, 处理多个视频信号和/或多个音频信号;以及本地CPU,用于控制多个信号处理电路,以便实时地处理视频信号和音频信号。 扩展处理器还包括从系统总线延伸的扩展系统总线,用于在多个信号处理电路之间传输多个视频信号和多个音频信号的数字音频视频(DAV)总线和用于发送的本地CPU总线 从本地CPU输出的控制信号。 每个处理电路具有能够连接到扩展系统总线,DAV总线和本地CPU总线在任何位置的公共接口,从而允许对视频信号和音频信号的处理,而不管安装位置如何 处理电路。