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公开(公告)号：US20200028327A1
公开(公告)日：2020-01-23
申请号：US16585948
申请日：2019-09-27
摘要： To provide a two-dimensional photonic crystal surface emitting laser capable of improving characteristics of light to be emitted, in particular, optical output power. The two-dimensional photonic crystal surface emitting laser includes: a two-dimensional photonic crystal including a plate-shaped base member and modified refractive index regions where the modified refractive index regions have a refractive index different from that of the plate-shaped base member and are two-dimensionally and periodically arranged in the base member; an active layer provided on one side of the two-dimensional photonic crystal; and a first electrode and a second electrode provided sandwiching the two-dimensional photonic crystal and the active layer for supplying current to the active layer, where the second electrode covers a region equal to or wider than the first electrode.
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公开(公告)号：US20190157836A1
公开(公告)日：2019-05-23
申请号：US15754932
申请日：2016-08-25
发明人： Susumu NODA , Hitoshi KITAGAWA , Yoshinori TANAKA
CPC分类号： H01S5/068 , H01S5/0425 , H01S5/0612 , H01S5/0687 , H01S5/105 , H01S5/1212 , H01S5/18 , H01S5/18319 , H01S5/187
摘要： A two-dimensional photonic crystal including a plate-shaped base body in which modified refractive index areas differs from the base body are periodically arranged in a two-dimensional pattern; an active layer provided on one side of the two-dimensional photonic crystal; and first and second electrodes facing each other across the two-dimensional photonic crystal and the active layer, for supplying an electric current to the active layer. The modified refractive index areas are provided in the in-plane occupancy of areas in the base body increases, or the lattice constant for those areas decreases, in the direction from an outer edge toward the center of a current passage region where the electric current passes through the two-dimensional photonic crystal. A stable laser oscillation can be obtained when temperature distribution is lower at the outer edge and higher at the center of the current passage region is formed within the two-dimensional photonic crystal.
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公开(公告)号：US20180348451A1
公开(公告)日：2018-12-06
申请号：US15570856
申请日：2016-04-07
发明人： Tatsuya YAMAMOTO , Kazuki KUBA , Masato KAWASAKI , Yoko INOUE , Tetsuo KOJIMA , Junichi NISHIMAE , Susumu NODA
CPC分类号： G02B6/42 , G02B6/4206 , G02B6/425 , H01S5/005 , H01S5/02284 , H01S5/105 , H01S5/18 , H01S5/4012 , H01S5/42
摘要： A laser module includes: a photonic crystal surface-emitting laser element; a collimating lens array for producing a parallel optical beam; a condenser lens for condensing the optical beam; and an optical fiber which receives the optical beam on one end and transmits the optical beam to the outside. In the collimating lens array, an aperture portion corresponding to a collimating lens allows passage of the optical beam with an energy of not less than 94.0% and not more than 99.5% with respect to 100% of the energy of the optical beam incident on the collimating lens array.
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公开(公告)号：US20170256911A1
公开(公告)日：2017-09-07
申请号：US15505560
申请日：2015-08-28
CPC分类号： H01S5/105 , H01S5/0425 , H01S5/0654 , H01S5/18 , H01S5/18319 , H01S5/34313 , H01S5/34353
摘要： A two-dimensional photonic crystal surface emitting laser capable of improving characteristics of light to be emitted, particularly optical output , which includes: a two-dimensional photonic crystal including a plate-shaped base member and modified refractive index regions where the modified refractive index regions have a refractive index different from that of the plate-shaped base member and are two-dimensionally and periodically arranged in the base member; an active layer provided on one side of the two-dimensional photonic crystal; and a first electrode and a second electrode provided sandwiching the two-dimensional photonic crystal and the active layer for supplying current to the active layer, where the second electrode covers a region equal to or wider than the first electrode, wherein the first electrode is formed so as to supply the current to the active layer with a different density depending on the in-plane position on the first electrode.
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5.发明申请公开(公告)号：US20190067907A1
公开(公告)日：2019-02-28
申请号：US16080480
申请日：2017-02-24
发明人： Susumu NODA , Yoshinori TANAKA , Menaka DE ZOYSA
CPC分类号： H01S5/105 , H01S5/0425 , H01S5/18 , H01S5/183 , H01S5/204 , H01S5/323 , H01S5/34313 , H01S5/3432 , H01S2301/17
摘要： A two-dimensional photonic crystal surface emitting laser has, in a plate-shaped base body, a two-dimensional photonic crystal layer in which modified refractive index region pairs are periodically arranged and an active layer provided on one side of the base body, each of the modified refractive index region pairs including a first modified refractive index region and a second modified refractive index region having refractive indexes different from a refractive index of the base body, wherein an area of a planar shape of the first modified refractive index region is larger than or equal to an area of a planar shape of the second modified refractive index region, and a thickness of the first modified refractive index region is smaller than a thickness of the second modified refractive index region.
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公开(公告)号：US20170222399A1
公开(公告)日：2017-08-03
申请号：US15120149
申请日：2015-02-13
CPC分类号： H01S5/105 , H01L2224/48091 , H01S5/005 , H01S5/0078 , H01S5/02208 , H01S5/02276 , H01S5/02292 , H01S5/02296 , H01S5/042 , H01S5/0425 , H01S5/06216 , H01S5/0622 , H01S5/0653 , H01S5/18 , H01S5/34313 , H01S5/34353 , H01L2924/00014
摘要： A control circuit in this laser equipment drives a drive circuit of a photonic crystal laser element under a predetermined condition. It was found that a wavelength width of a laser beam to be output from the photonic crystal laser element is dependent on a standardized drive current k and a pulse width T, and had a predetermined relationship with these. By meeting this condition, a laser beam with a plurality of wavelengths can be controlled and output.
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公开(公告)号：US20170012407A1
公开(公告)日：2017-01-12
申请号：US15115713
申请日：2014-11-10
IPC分类号： H01S5/0683 , H01S5/18 , H01S5/10 , H01S5/022
CPC分类号： H01S5/0683 , H01S5/022 , H01S5/105 , H01S5/18 , H01S5/187
摘要： A surface emitting laser element capable of emitting a main beam and a sub-beam, and a monitoring light detection element capable of detecting a light intensity of the sub-beam are included, the surface emitting laser element is a PCSEL, the main beam and the sub-beam are emitted in an upward direction of the surface emitting laser element and are inclined to each other at a predetermined angle, and respective changes in a peak light intensity of the main beam and a peak light intensity of the sub-beam with respect to a value of a driving current of the surface emitting laser element are correlated with each other. Therefore, if an output of the monitoring light detection element indicating the peak light intensity of the sub-beam is used, the peak light intensity of the main beam can be estimated.
摘要翻译： 包括能够发射主光束和子光束的表面发射激光器元件和能够检测子光束的光强度的监视光检测元件，表面发射激光器元件是PCSEL，主光束和 子光束在表面发射激光器元件的向上方向上发射，并且以预定角度彼此倾斜，并且主光束的峰值光强度和子光束的峰值光强度各自变化， 相对于表面发射激光元件的驱动电流的值彼此相关。 因此，如果使用表示子光束的峰值光强度的监视光检测元件的输出，则可以估计主光束的峰值光强度。
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公开(公告)号：US20160020581A1
公开(公告)日：2016-01-21
申请号：US14771911
申请日：2014-02-27
CPC分类号： H01S5/18 , H01S3/08009 , H01S5/0425 , H01S5/105 , H01S5/12 , H01S5/1231 , H01S5/183 , H01S5/18319 , H01S5/187 , H01S2301/14
摘要： A semiconductor laser element is realized with high beam quality (index M2
摘要翻译： 半导体激光元件实现了高光束质量（指标M2 <1）。 衍射光栅层6的衍射光栅6ba沿主表面2a延伸并设置在衍射光栅层6的p侧表面6a上; 衍射光栅层6的折射率在衍射光栅6ba中沿主表面2a延伸的方向周期性地变化; 衍射光栅6ba具有多个孔6b; 多个孔6b设置在p侧表面6a中并且沿着正方形格子R3平移对称地布置; 多个孔6b各自具有相同的尺寸和形状; 每个孔6b对应于衍射光栅6ba的晶格点，并且具有三棱柱形状; 孔6b的底面6c的形状为近似的直角三角形。
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公开(公告)号：US20160020576A1
公开(公告)日：2016-01-21
申请号：US14772459
申请日：2014-03-07
CPC分类号： H01S5/0092 , G02F1/3544 , G02F1/3551 , G02F1/3558 , G02F1/37 , G02F2001/3548 , H01S5/02248 , H01S5/02446 , H01S5/105 , H01S5/18 , H01S5/187
摘要： In a laser device, a different refractive index region 6B of a photonic crystal layer is arranged at a lattice point position of a square lattice. In the case where a plane shape of the different refractive index regions 6B is a nearly isosceles right triangle, two sides forming a right angle extend along longitudinal and horizontal lateral lines of the square lattice. A direction parallel to or vertical to an oblique side of the triangle and a direction of polarization in the periodic polarization inversion structure of a nonlinear optical crystal NL are the same.
摘要翻译： 在激光装置中，将光子晶体层的不同的折射率区域6B配置在正方格子的格子点位置。 在不同折射率区域6B的平面形状是近似等腰直角三角形的情况下，形成直角的两边沿着正方形格子的纵向和横向的横向延伸。 与非线性光学晶体NL的周期极化反转结构中的三角形的倾斜侧平行或垂直的方向和偏振方向相同。
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公开(公告)号：US20210318493A1
公开(公告)日：2021-10-14
申请号：US17273319
申请日：2019-09-13
发明人： Yoko INOUE , Masato KAWASAKI , Tatsuya YAMAMOTO , Kazuki KUBA , Susumu NODA
摘要： A multiplexing optical system includes a light source, a lens and a lens array. The light source includes a plurality of light emitting elements of surface emitting lasers. The lens is configured to change and condense optical paths of laser light beams emitted from the light emitting elements. The lens array includes a plurality of lens regions arrayed so as to correspond to respective optical paths of the laser light beams changed by the lens, and is configured to condense the laser light beams by the lens regions to form a multiplexed beam.
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