Optical fiber transmission system and dichroic beam splitter therefor

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	Optical fiber transmission system and dichroic beam splitter therefor
其他题名	Optical fiber transmission system and dichroic beam splitter therefor
	FYE, DONALD M.
	1984-02-14
专利权人	GTE LABORATORIES INCORPORATED A CORP. OF DE
公开日期	1984-02-14
授权国家	美国
专利类型	授权发明
摘要	A dichroic beamsplitter includes two glass prisms, each having an isosceles right triangular cross section, with a multilayer dielectric coating sandwiched therebetween. Each layer of the coating is tuned for quarter-wave operation with 45 DEG incidence of light at 0.83 mu m. The coating comprises 53 layers of three different materials arranged in a specific order. The materials have refractive indexes of 45, 625, and 2.25 and can be, for example, silicon dioxide, aluminum oxide, and titanium oxide. An optical fiber transmission system includes an optical fiber and a beamsplitter at opposite ends thereof. One of the beamsplitters is oriented with respect to the fiber at 43 DEG incidence and has a high nonpolarizing reflectance at a wavelength lambda 2 and a low loss transmission at a wavelength lambda The other beamsplitter is oriented with respect to the fiber at a 47 DEG incidence and has a high nonpolarizing reflectance at the wavelength lambda 1 and a low loss transmission at the wavelength lambda 2. The value of the wavelength lambda 1 is 0.81 mu m and the value of the wavelength lambda 2 is 0.85 mu m. A combination, including a dichroic beamsplitter having a high nonpolarizing reflectance at the wavelength lambda 2 and low loss transmission at the wavelength lambda 1, has a signal at the wavelength lambda 1 to one side thereof. An optic fiber receives the signal to the wavelength lambda 1 at an opposite side of the beamsplitter. A signal at the wavelength lambda 2 is provided to the beamsplitter at a third side thereof, perpendicular to both aforesaid sides, so that the signal at the wavelength lambda 2 is reflected to the optic fiber for transmission therethrough. A detector for power monitoring is coupled to a fourth side of the beamsplitter, the fourth side being directly opposite to the third side thereof.
其他摘要	二向色分束器包括两个玻璃棱镜，每个玻璃棱镜具有等腰直角三角形横截面，其间夹有多层介电涂层。每层涂层调整为四分之一波长操作，45°入射光为0.83μm。涂层包括53层三种不同材料，按特定顺序排列。该材料具有45,625和2.25的折射率，并且可以是例如二氧化硅，氧化铝和氧化钛。一种光纤传输系统，包括光纤和位于其两端的分束器。其中一个分束器相对于光纤以43°入射方向取向，并且在波长λ2处具有高非偏振反射率，在波长λ1处具有低损耗透射率。另一个分束器相对于光纤以47°取向。 DEG入射并且在波长λ1处具有高的非偏振反射率并且在λ处具有低的损耗透射率波长λ2波长λ1的值为0.81μm，波长λ2的值为0.85μm。包括在波长λ2处具有高非偏振反射率并且在波长λ1处具有低损耗透射率的二向色分束器的组合具有波长λ1至其一侧的信号。光纤在分束器的相对侧接收波长λ1的信号。波长λ2的信号在其第三侧提供给分束器，垂直于前述两侧，使得波长λ2的信号被反射到光纤以便通过其传输。用于功率监测的检测器耦合到分束器的第四侧，第四侧与其第三侧直接相对。
授权日期	1984-02-14
申请日期	1981-12-15
专利号	US4431258
专利状态	失效
申请号	US06/330996
公开（公告）号	US4431258
IPC 分类号	G02B27/10 \| G02B6/34 \| H04B10/24 \| G02B5/28
专利代理人	-
代理机构	FISHER, FRED
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/35756
专题	半导体激光器专利数据库
作者单位	GTE LABORATORIES INCORPORATED A CORP. OF DE
推荐引用方式 GB/T 7714	FYE, DONALD M.. Optical fiber transmission system and dichroic beam splitter therefor. US4431258[P]. 1984-02-14.

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