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公开(公告)号：US4874216A
公开(公告)日：1989-10-17
申请号：US210640
申请日：1988-06-23
IPC分类号： H04B10/27 , G02B6/34 , G02F1/01 , G02F1/015 , G02F1/025 , G02F1/125 , G02F1/313 , H04B10/00 , H04B10/29
CPC分类号： G02B6/12007 , G02B6/29329 , G02B6/29395 , G02F1/3137 , G02F1/0126 , G02F1/3138 , G02F2001/0152 , G02F2001/0154 , G02F2201/305 , G02F2203/055
摘要： A variable-waveguide optical branching filter is disclosed, in which a diffraction grating is formed in the cross region of two crossing waveguides, only light of a particular wavelength which is determined by the period of the diffraction grating is branched to a desired one of the waveguides, and the refractive index of the cross region is changed by control of a voltage or a current, or by way of irradiation with light, thereby changing the wavelength of light to be branched.
摘要翻译： 公开了一种可变波导光分波器，其中在两个交叉波导的交叉区域中形成衍射光栅，只有由衍射光栅的周期确定的特定波长的光被分支到所需的一个 波导，并且通过控制电压或电流或通过照射光来改变交叉区域的折射率，从而改变要分支的光的波长。
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公开(公告)号：US4743087A
公开(公告)日：1988-05-10
申请号：US739477
申请日：1985-05-30
IPC分类号： G02B6/00 , G02B6/34 , G02F1/19 , H01L27/15 , H01S5/00 , H01S5/026 , H01S5/12 , H01S5/16 , H01S3/19
CPC分类号： H01S5/0265 , H01S5/12 , H01S5/16 , H01S5/164
摘要： An optical modulation element is disclosed in which a diffraction grating is formed along a waveguide for guiding unmodulated incident light and inclined to the direction of travel of the light, and a structure is provided for changing the refractive index of the waveguide portion where the diffraction grating is formed. the refractive index of the waveguide portion can be effected by voltage application, by current injection or by light irradiation.
摘要翻译： 公开了一种光调制元件，其中衍射光栅沿着波导形成以引导未调制的入射光并且倾斜于光的行进方向，并且提供了用于改变波导部分的折射率的结构，其中衍射光栅 形成了。 波导部分的折射率可以通过电压施加，电流注入或光照射来实现。
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公开(公告)号：US4665527A
公开(公告)日：1987-05-12
申请号：US669093
申请日：1984-11-06
CPC分类号： H01S5/18394 , H01S5/0424 , H01S5/0425
摘要： A distributed feedback semiconductor laser, in which a DFB region is formed by a plurality of first semiconductor layers and a plurality of second semiconductor layers larger in energy gap than the first semiconductor layers which are alternately arranged on a substrate with a period for developing a Bragg reflection at a desired wavelength. A p-type region is formed in a part of the DFB region in a manner to provide a plane of junction across the plurality of first semiconductor layers and the plurlaity of second semiconductor layers while an n-type region is formed in the remaining part of the DFB region. The plurality of first semiconductor layers and the plurality of second semiconductor layers are alternately deposited to form the DFB region.
摘要翻译： 一种分布式反馈半导体激光器，其中DFB区域由多个第一半导体层形成，并且能量间隔大于第一半导体层的多个第二半导体层，该第二半导体层交替布置在具有用于显影布拉格的周期的基板上 在所需波长的反射。 在DFB区域的一部分中，以提供跨越多个第一半导体层的结的平面和第二半导体层的多重性的方式形成p型区域，而在其余部分中形成n型区域 DFB区域。 多个第一半导体层和多个第二半导体层交替沉积以形成DFB区域。
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公开(公告)号：US4653058A
公开(公告)日：1987-03-24
申请号：US487124
申请日：1983-04-21
CPC分类号： H01S5/0264 , H01S5/12 , H01S5/2275
摘要： A distributed feedback semiconductor laser with a monitor, which has periodic corrugations on a light emitting layer or an adjoining layer in the direction of travel of light and performs laser oscillation by the injection of a current into said light emitting layer. In accordance with the present invention, a laser region forming said distributed feedback semiconductor laser and a monitor region for detecting the output of said laser region are disposed on the same substrate. A gap between said monitor region and said laser region is filled with a semiconductor of an energy bandgap larger than that of the light emitting layer of said laser region.
摘要翻译： 一种具有监视器的分布式反馈半导体激光器，其在光的行进方向上的发光层或邻接层上具有周期性波纹，并且通过将电流注入到所述发光层中而进行激光振荡。 根据本发明，形成所述分布式反馈半导体激光器的激光区域和用于检测所述激光区域的输出的监视区域设置在同一基板上。 所述监测区域和所述激光区域之间的间隙填充有比所述激光区域的发光层的能带隙大的能带隙的半导体。
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公开(公告)号：US4589117A
公开(公告)日：1986-05-13
申请号：US502589
申请日：1983-06-09
IPC分类号： H01S3/02 , H01S3/06 , H01S5/00 , H01S5/02 , H01S5/026 , H01S5/10 , H01S5/12 , H01S5/227 , H01S3/19
CPC分类号： H01S5/1032 , H01S5/026 , H01S5/227 , H01S5/0205 , H01S5/12
摘要： A semiconductor laser, in which active layers are provided on the top surface of the mesa and the remainder surface in a substrate as a first semiconductor layer. Second semiconductor layers are provided on the active layers to such a thickness that the second semiconductor layer may not reach the first semiconductor layer on the mesa. Third semiconductor layers are provided on the second semiconductor layer to such a thickness that the third semiconductor layers may be flush with or higher than the first semiconductor layer on the mesa, so that the first semiconductor layer on the top surface of the mesa is just jointed with the third semiconductor layer on the remainder surface in the substrate.
摘要翻译： 半导体激光器，其中有源层设置在台面的顶表面上，其余表面设置在基板中作为第一半导体层。 第二半导体层设置在有源层上，使得第二半导体层可能不到达台面上的第一半导体层。 第三半导体层设置在第二半导体层上，使得第三半导体层可以与台面上的第一半导体层齐平或更高，使得台面的顶表面上的第一半导体层刚刚接合 其中衬底中剩余表面上的第三半导体层。
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公开(公告)号：US4516243A
公开(公告)日：1985-05-07
申请号：US436928
申请日：1982-10-27
申请人： Katsuyuki Utaka , Kazuo Sakai , Shigeyuki Akiba
发明人： Katsuyuki Utaka , Kazuo Sakai , Shigeyuki Akiba
CPC分类号： H01S5/12 , H01S2301/14 , H01S5/1215
摘要： A distributed feedback semiconductor laser which has, in an active layer or an adjoining layer, first corrugations causing periodic refractive index variations in the travelling direction of light and performs laser oscillation by the injection of a current into said active layer portion. In accordance with the present invention, second corrugations are formed to be aligned obliquely to said first corrugations, thereby causing additional loss to the TM mode to permit oscillation in the TE mode alone.
摘要翻译： 一种分布反馈半导体激光器，其在有源层或邻接层中具有导致光的行进方向周期性折射率变化的第一波纹，并且通过向所述有源层部分注入电流来执行激光振荡。 根据本发明，第二波纹被形成为与所述第一波纹倾斜对准，从而对TM模式造成额外的损耗，以允许单独在TE模式中振荡。
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公开(公告)号：US4701930A
公开(公告)日：1987-10-20
申请号：US764217
申请日：1985-08-09
摘要： A distributed feedback semiconductor laser, in which the periodic corrugations in the first region and the second region of the light emitting region of the DFB laser have different lengths or depths to make the intensities of the Bragg reflection of the first region and the second region different from each other, thereby obtaining asymmetrical light outputs from the both sides of the DFB laser.
摘要翻译： 分布式反馈半导体激光器，其中DFB激光器的发光区域的第一区域和第二区域中的周期性波纹具有不同的长度或深度，以使得第一区域和第二区域的布拉格反射的强度不同 从而从DFB激光器的两侧获得不对称的光输出。
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公开(公告)号：US4653059A
公开(公告)日：1987-03-24
申请号：US688566
申请日：1985-01-03
摘要： A distributed feedback semiconductor laser which has periodic corrugations formed in a light emitting layer or an adjoining layer to extend in the direction of travel of light. A window region formed by a semiconductor layer larger in energy gap than the light emitting layer is provided on the extension line of one end of a laser region formed in the light emitting layer. The length of the window region is so limited as to prevent substantial reflection of laser output light in the window region. The end face of the laser on the opposite side from the window region is coated with a film for increasing reflectivity.
摘要翻译： 一种分布式反馈半导体激光器，其具有在发光层或相邻层中形成的周期性波纹，以在光的行进方向上延伸。 由形成在发光层的激光区域的一端的延长线上设置由能隙比发光层大的半导体层形成的窗口区域。 窗口区域的长度被限制以防止激光输出光在窗口区域中的实质反射。 在与窗口区域相反的一侧上的激光器的端面涂覆有用于增加反射率的膜。
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公开(公告)号：US4648096A
公开(公告)日：1987-03-03
申请号：US660934
申请日：1984-10-15
摘要： A distributed feedback semiconductor laser which has periodic corrugations in a light emitting layer or an adjoining layer in the direction of travel of light and performs laser oscillation by the injection of carriers into said light emitting layer. In accordance with the present invention, there are provided, in the neighborhood of the center of a laser region, a region for changing the phase of the periodic corrugations by about 180 degrees, and, on the extension of the laser oscillation region at both sides thereof, a window region formed of a semiconductor larger in energy gap but smaller in refractive index than the light emitting layer, the length of the window region being so limited as to prevent substantial reflection of laser output light in the window region.
摘要翻译： 一种分布式反馈半导体激光器，其在光的行进方向上在发光层或邻接层中具有周期性波纹，并通过将载流子注入所述发光层来执行激光振荡。 根据本发明，在激光区域的中心附近设置用于将周期性波纹的相位改变约180度的区域，并且在两侧的激光振荡区域的延伸上 由能隙较大且折射率小于发光层的半导体形成的窗口区域，窗口区域的长度受到限制，以防止激光输出光在窗口区域中的实质反射。
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公开(公告)号：US4633474A
公开(公告)日：1986-12-30
申请号：US678244
申请日：1984-12-05
摘要： A distributed feedback semiconductor laser which has periodic corrugations formed in a layer adjoining a light emitting layer so as to extend in the direction of travel of light and performs laser oscillation by the injection of current into the light emitting layer, in which a part of at least one metal electrode has a TM mode suppressing region disposed at a position where light is essentially distributed in the thickwise direction of the laser. A window region formed of a semiconductor larger in energy gap than the light emitting layer is disposed at both ends of the laser oscillation region in the direction of travel of light, the length of the window region being limited so that no substantial reflection occurs therein.
摘要翻译： 一种分布式反馈半导体激光器，其具有在与发光层相邻的层中形成的周期性波纹，以沿着光的行进方向延伸，并且通过向发光层注入电流并执行激光振荡，其中， 至少一个金属电极具有设置在光在激光的厚度方向上基本分布的位置的TM模式抑制区域。 在光的行进方向上，在激光振荡区域的两端配置由能量差大于发光层的半导体形成的窗口区域，限制窗口区域的长度，使得不发生实质的反射。
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