公开(公告)号：US06469778B2

公开(公告)日：2002-10-22

申请号：US09758421

申请日：2001-01-12

申请人： Kimio Asaka ,  Yoshihito Hirano ,  Takayuki Yanagisawa ,  Shusou Wadaka ,  Yasuisa Ooga ,  Etsuo Sugimoto

发明人： Kimio Asaka ,  Yoshihito Hirano ,  Takayuki Yanagisawa ,  Shusou Wadaka ,  Yasuisa Ooga ,  Etsuo Sugimoto

IPC分类号： G01P336

CPC分类号： G01S7/4818 ,  G01S7/486 ,  G01S17/10

摘要： A coherent laser radar system includes a pulsed laser oscillating a pulsed laser beam which is split into two parts by an optical divider. A first part of the two is transmitted as a transmitted beam via a beam splitter. A second part is supplied to a delay line via a coupling optics and others to be delayed by a predetermined time as a local beam, and is incident onto an optical coupler. The received beam from the target is incident onto the optical coupler via a scanning optics and so on. A photodetector carries out the coherent detection of the light beam coupled by the optical coupler. A signal processor computes a target velocity and the like from a signal generated by the detection and converted into a digital signal by an A/D converter. This makes it possible to solve a problem of a conventional system in that the system configuration is complicated and expensive.

摘要翻译： 相干激光雷达系统包括脉冲激光振荡脉冲激光束，该激光束通过光学分配器分成两部分。 两者的第一部分通过分束器作为透射光束传输。 第二部分经由耦合光学器件提供给延迟线，而其它部分被延迟预定时间作为局部光束，并入射到光耦合器上。 来自目标的接收光束通过扫描光学器件等入射到光耦合器上。 光电检测器执行由光耦合器耦合的光束的相干检测。 信号处理器从由检测产生的信号中计算出目标速度等并由A / D转换器转换成数字信号。 这使得可以解决常规系统的问题，因为系统配置是复杂和昂贵的。

公开(公告)号：US06765654B2

公开(公告)日：2004-07-20

申请号：US10296043

申请日：2002-11-21

申请人： Kimio Asaka ,  Yoshihito Hirano ,  Takayuki Yanagisawa

发明人： Kimio Asaka ,  Yoshihito Hirano ,  Takayuki Yanagisawa

IPC分类号： G01C308

CPC分类号： G01S17/58 ,  G01S7/497 ,  G01S17/10

摘要： An object of the invention is to obtain a coherent laser radar device that provides one system of a photo detector and eliminates a blind zone, including a pulsed laser that oscillates at a frequency which is identical with or close to an output light of a local light source as a single frequency; a transmission/reception optical system that irradiates a pulsed laser beam from the pulsed laser toward a target as a transmission light and receives a scattered light from the target as a reception light; a light coupling means that couples the output light from the local light source and the reception light; a photo detecting portion that conducts light coherent detection on a coupled light; and a signal processing device that calculates a speed and a distance of a target in accordance with an output of the detection, in which the photo detecting portion comprises: a photo detecting element that conducts the light coherent detection; a microwave switch that changes over a propagation path of an output from the photo detecting element; a microwave amplifier; and a switch control means that changes over the microwave switch so as to transmit a signal before a reference time as a monitor signal and transmit a signal after the reference time as a reception signal with a time at which the pulse light from the pulsed laser has completely passed through the transmission/reception optical system as the reference time.

摘要翻译： 本发明的目的是获得一种相干激光雷达装置，其提供光检测器的一个系统并消除盲区，包括以与局部光的输出光相同或接近的频率振荡的脉冲激光 源为单频; 发送/接收光学系统，其将来自脉冲激光的脉冲激光束照射到作为透射光的目标，并且接收来自目标的散射光作为接收光; 光耦合装置，其耦合来自本地光源的输出光和接收光; 在耦合光上进行光相干检测的光检测部; 以及信号处理装置，其根据检测的输出来计算目标的速度和距离，其中光检测部分包括：光检测元件，其进行光相干检测; 微波开关，其从所述光检测元件的输出的传播路径改变; 微波放大器; 以及切换控制装置，其转换微波开关，以便在参考时间之前传送信号作为监视信号，并且在参考时间之后将信号作为接收信号发送，其中来自脉冲激光器的脉冲光具有时间 完全通过发送/接收光学系统作为参考时间。

公开(公告)号：US09310487B2

公开(公告)日：2016-04-12

申请号：US14347938

申请日：2012-12-07

申请人： Takeshi Sakimura ,  Takayuki Yanagisawa ,  Shumpei Kameyama ,  Toshiyuki Ando ,  Yoshihito Hirano

发明人： Takeshi Sakimura ,  Takayuki Yanagisawa ,  Shumpei Kameyama ,  Toshiyuki Ando ,  Yoshihito Hirano

IPC分类号： G01C3/08 ,  G01S17/10 ,  G01S17/95 ,  G01S17/58 ,  G01S7/481 ,  G01S7/484

CPC分类号： G01S17/102 ,  G01S7/4815 ,  G01S7/4818 ,  G01S7/484 ,  G01S17/107 ,  G01S17/58 ,  G01S17/95 ,  Y02A90/19

摘要： A lidar includes CW laser light sources that oscillate CW laser light rays with wavelengths different from each other; an optical multiplexing coupler that mixes the CW laser light rays oscillated by the CW laser light sources; an optical branching coupler that splits the CW laser light passing through the mixing by the optical multiplexing coupler; a light modulator that modulates first CW laser light split by the optical branching coupler; and an optical fiber amplifier that amplifies the laser light modulated by the light modulator, in which a transmit-receive optical system irradiates a target with the laser light amplified by the optical fiber amplifier, and receives scattered light of the laser light by the target.

摘要翻译： 激光雷达包括CW激光光源，其振荡具有彼此不同波长的CW激光光线; 光复用耦合器，其混合由CW激光光源振荡的CW激光; 光分路耦合器，其通过光复用耦合器分离通过混合的CW激光; 调制由光分路耦合器分离的第一CW激光的光调制器; 以及放大由光调制器调制的激光的光纤放大器，其中发射接收光学系统用由光纤放大器放大的激光照射目标，并且由目标接收激光的散射光。

公开(公告)号：US20130121355A1

公开(公告)日：2013-05-16

申请号：US13810750

申请日：2010-12-21

申请人： Noriyuki Miyamoto ,  Shuhei Yamamoto ,  Takayuki Yanagisawa ,  Yoshihito Hirano

发明人： Noriyuki Miyamoto ,  Shuhei Yamamoto ,  Takayuki Yanagisawa ,  Yoshihito Hirano

IPC分类号： H01S3/04

CPC分类号： H01S3/04 ,  H01S3/042 ,  H01S3/0632 ,  H01S3/0635 ,  H01S3/08072 ,  H01S3/2308 ,  H01S3/2383

摘要： In a laser device, a control range of focal distance of a generated thermal lens is broadened and reliability is improved. A mode control waveguide-type laser device includes: a planar laser medium having a waveguide structure in a thickness direction of a cross section perpendicular to an optical axis, for generating gain with respect to laser light; a cladding bonded onto the laser medium; and a heat sink bonded onto the laser medium. The laser medium generates a lens effect, and the laser light oscillates in a waveguide mode in the thickness direction, and oscillates in a spatial mode due to the lens effect in a direction perpendicular to the optical axis and the thickness direction. The refractive index distribution within the laser medium is created by generating a temperature distribution in the laser medium depending on a junction area of the cladding and the heat sink.

摘要翻译： 在激光装置中，所产生的热透镜的焦距的控制范围变宽，可靠性提高。 模式控制波导型激光装置包括：平面激光介质，其在垂直于光轴的横截面的厚度方向上具有波导结构，用于产生相对于激光的增益; 覆盖在激光介质上的包层; 和结合到激光介质上的散热器。 激光介质产生透镜效应，并且激光在厚度方向上以波导模式振荡，并且由于在垂直于光轴和厚度方向的方向上的透镜效应而以空间模式振荡。 激光介质内的折射率分布是通过根据包层和散热器的接合区域在激光介质中产生温度分布而产生的。

公开(公告)号：US07839908B2

公开(公告)日：2010-11-23

申请号：US11579454

申请日：2005-03-30

申请人： Takayuki Yanagisawa ,  Yoshihito Hirano ,  Syuhei Yamamoto ,  Masao Imaki ,  Kiyohide Sakai ,  Yasuharu Koyata

发明人： Takayuki Yanagisawa ,  Yoshihito Hirano ,  Syuhei Yamamoto ,  Masao Imaki ,  Kiyohide Sakai ,  Yasuharu Koyata

IPC分类号： H01S3/04

CPC分类号： H01S3/0632 ,  H01S3/0405 ,  H01S3/0612 ,  H01S3/08072 ,  H01S3/094053 ,  H01S3/09415 ,  H01S3/109

摘要： Provided is a device capable of oscillating a plurality of oscillation modes within a laser medium for obtaining a fundamental wave output which is easy in output scaling and high in luminance, thereby enabling a second harmonic conversion which is high in efficiency. The device includes: a laser medium (5) that is planar, has a waveguide structure in a thickness direction of a cross-section that is perpendicular to an optical axis (6), and has a cyclic lens effect in a direction perpendicular to the optical axis (6) and the thickness direction; a clad (4) that is bonded onto one surface of the laser medium (5); and heat sink (3) that is bonded onto one surface side of the laser medium (5) through the clad (4), and in the device, a laser oscillation includes a laser oscillation that oscillates in a waveguide mode of the laser medium (5), and a laser oscillation that oscillates in a plurality of resonator modes that are generated by a cyclic lens effect of the laser medium (5).

摘要翻译： 提供了一种能够在激光介质内振荡多个振荡模式的装置，用于获得输出缩放容易且亮度高的基波输出，从而实现效率高的二次谐波转换。 该装置包括：平面的激光介质（5），在与光轴（6）垂直的横截面的厚度方向上具有波导结构，并且在垂直于光轴的方向上具有循环透镜效应 光轴（6）和厚度方向; 在激光介质（5）的一个表面上结合的包层（4）; 以及通过包层（4）结合到激光介质（5）的一个表面侧的散热器（3），并且在该器件中，激光振荡包括以激光介质的波导模式振荡的激光振荡（ 以及以由激光介质（5）的循环透镜效应产生的多个谐振器模式振荡的激光振荡。

公开(公告)号：US20100189151A1

公开(公告)日：2010-07-29

申请号：US12669966

申请日：2007-07-27

申请人： Takayuki Yanagisawa ,  Yoshihito Hirano ,  Shuhei Yamamoto ,  Yasuharu Koyata

发明人： Takayuki Yanagisawa ,  Yoshihito Hirano ,  Shuhei Yamamoto ,  Yasuharu Koyata

IPC分类号： H01S5/327 ,  H01S5/10

CPC分类号： H01S3/0632 ,  H01S3/0612 ,  H01S3/0625 ,  H01S3/10061 ,  H01S3/1308 ,  H01S3/1611 ,  H01S3/1673

摘要： A planar waveguide laser device forms a waveguide by a plate-like laser medium having birefringence and clad attached to at least one of the surfaces of the laser medium perpendicular to its thickness direction, amplifies laser light by a gain produced by excitation light incident on the laser medium, and performs laser oscillation. The laser medium is formed of a material having an optic axis on a cross section perpendicular to the light axis, which is the laser travelling direction. The clad is formed of a material having a refractive index in a range between refractive indexes of two polarized lights that travel along the light axis in the laser medium and have oscillation surfaces that are orthogonal to each other. The planar waveguide laser device readily oscillates linearly polarized laser light.

摘要翻译： 平面波导激光器件通过具有双折射和包层的板状激光介质形成波导，激光介质垂直于其厚度方向附着在激光介质的至少一个表面上，通过由入射到其上的激发光产生的增益来放大激光 激光介质，进行激光振荡。 激光介质由在垂直于作为激光行进方向的光轴的横截面上具有光轴的材料形成。 包层由折射率在激光介质中沿着光轴行进的两个偏振光的折射率之间的范围内的材料形成，并且具有彼此正交的振动表面。 平面波导激光器件容易振荡线偏振激光。

公开(公告)号：US07295290B2

公开(公告)日：2007-11-13

申请号：US10520128

申请日：2003-05-30

申请人： Takayuki Yanagisawa ,  Syuhei Yamamoto ,  Yoshihito Hirano ,  Shumpei Kameyama ,  Toshiyuki Ando

发明人： Takayuki Yanagisawa ,  Syuhei Yamamoto ,  Yoshihito Hirano ,  Shumpei Kameyama ,  Toshiyuki Ando

IPC分类号： G01C3/08

CPC分类号： G01S7/481 ,  G01S7/48 ,  G01S7/4811 ,  G01S7/4813 ,  G01S7/4818 ,  G01S7/484 ,  G01S7/499 ,  G01S17/06 ,  G01S17/95 ,  G02F1/39 ,  Y02A90/19

摘要： To obtain a coherent laser radar device that realizes high reliability and the high output of a transmitted light, the device includes a first optical coupler that branches a laser beam from a laser source into two lights, a local light and a transmitted light, an optical modulator that modulates the transmitted light, a space type optical amplifier that amplifies the modulated transmitted light, a transmitting/receiving optical system that applies the amplified transmitted light toward a target and receives a scattered light from the target, a transmitting/receiving light splitting device that splits the transmitted light and the received light, a second optical coupler that mixes the local light and the split received light together, a photodetector that detects heterodyne of a mixed light, a beat signal amplifier that amplifies a detected signal, a signal processing device that processes an amplified signal, and a display device that displays a processed result. The first and second optical couplers and an optical modulator are structured by polarization maintained type optical elements, and an optical path that extends from the laser source to the space type optical amplifier through the first optical coupler, an optical path that extends from the transmitting/receiving light splitting device to the photodetector through the second optical coupler, and an optical path that extends from the first optical coupler to the second optical coupler are connected by polarization maintained type single mode optical fibers.

摘要翻译： 为了获得实现高可靠性和透射光的高输出的相干激光雷达装置，该装置包括第一光耦合器，其将来自激光源的激光束分成两个光，局部光和透射光，光学 调制透射光的调制器，放大经调制的透射光的空间型光放大器，将放大的透射光施加到目标并接收来自目标的散射光的发射/接收光学系统，发射/接收分光装置 将透射光和接收光分开的第二光耦合器，将局部光和分离的接收光混合在一起的第二光耦合器，检测混合光的外差的光电检测器，放大检测信号的拍频信号放大器，信号处理装置 处理放大信号，以及显示处理结果的显示装置。 第一和第二光耦合器和光调制器由偏振维持型光学元件构成，以及通过第一光耦合器从激光源延伸到空间型光放大器的光路，从发射/ 通过所述第二光耦合器将光分离装置接收到所述光电检测器，并且从所述第一光耦合器延伸到所述第二光耦合器的光路通过偏振维持型单模光纤连接。

公开(公告)号：US07042919B2

公开(公告)日：2006-05-09

申请号：US10343938

申请日：2001-06-21

申请人： Takayuki Yanagisawa ,  Yoshihito Hirano

发明人： Takayuki Yanagisawa ,  Yoshihito Hirano

IPC分类号： H01S3/091

CPC分类号： H01S3/07 ,  H01S3/042 ,  H01S3/0606 ,  H01S3/08072 ,  H01S3/08095 ,  H01S3/0813 ,  H01S3/0941 ,  H01S3/23 ,  H01S3/2316

摘要： A pumping module is provided with a first square rod group including a first square rod having two heat sinking surfaces normal to a direction of y axis perpendicular to an optical axis, and a second square rod having two heat sinking surfaces normal to a direction of x axis perpendicular to the optical axis and the direction of the y axis, and a second square rod group including a third square rod having two heat sinking surfaces normal to the direction of the y axis and a fourth square rod having two heat sinking surfaces normal to the direction of the x axis. A polarization rotator is disposed between the first and second square rod groups, for rotating a polarization of laser light passing therethrough by 90 degrees.

摘要翻译： 泵送模块设置有第一方棒组，其包括具有垂直于垂直于光轴的y轴方向的两个散热表面的第一方棒，以及具有垂直于x方向的两个散热表面的第二方棒 以及第二方棒组，其包括具有垂直于y轴方向的两个散热表面的第三方棒，以及具有与所述y轴方向垂直的两个散热表面的第四方棒 x轴的方向。 偏振旋转器设置在第一和第二方棒组之间，用于将通过其的激光的偏振旋转90度。

公开(公告)号：US09214784B2

公开(公告)日：2015-12-15

申请号：US14374696

申请日：2012-03-19

申请人： Kyosuke Kuramoto ,  Takayuki Yanagisawa ,  Yoshihito Hirano

发明人： Kyosuke Kuramoto ,  Takayuki Yanagisawa ,  Yoshihito Hirano

IPC分类号： H01S3/091 ,  H01S5/04 ,  G02F1/377 ,  H01S3/109 ,  H01S3/06 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/04 ,  G02F1/35

CPC分类号： H01S5/041 ,  G02F1/377 ,  G02F2001/3509 ,  H01S3/0401 ,  H01S3/0405 ,  H01S3/0612 ,  H01S3/0615 ,  H01S3/0621 ,  H01S3/0625 ,  H01S3/0627 ,  H01S3/09415 ,  H01S3/109 ,  H01S3/1611 ,  H01S3/1673 ,  H01S2301/02

摘要： An end surface 3b of a solid-state laser element 3 is sloped in such a way that, assuming that laser light is incident upon air from the end surface, an angle of incidence which a normal to an inner side of the end surface forms with a traveling direction of the laser light substantially matches the Brewster angle at the incidence plane, an end surface 4a of a wavelength conversion element 4 is sloped in such a way that, assuming that the laser light is incident upon air from the end surface, an angle of incidence which a normal to an inner side of the end surface forms with a traveling direction of the laser light substantially matches the Brewster angle at the incidence plane, and the end surface 3b and the end surface 4b are arranged in such a way as to be opposite to each other.

摘要翻译： 固体激光元件3的端面3b以这样的方式倾斜，即假设激光从端面入射到空气上，与端面的内侧垂直的入射角与 激光的行进方向基本上与入射面处的布鲁斯特角度匹配，波长转换元件4的端面4a倾斜，假设激光从端面入射到空气上， 与激光的行进方向形成的端面的内侧的法线的入射角基本上与入射面处的布鲁斯特角度匹配，端面3b和端面4b以如下方式配置： 相互对立。

公开(公告)号：US20110255562A1

公开(公告)日：2011-10-20

申请号：US13141910

申请日：2009-02-05

申请人： Shuhei Yamamoto ,  Yosuke Akino ,  Takayuki Yanagisawa ,  Yoshihito Hirano

发明人： Shuhei Yamamoto ,  Yosuke Akino ,  Takayuki Yanagisawa ,  Yoshihito Hirano

IPC分类号： H01S3/10 ,  H01S3/13

CPC分类号： H01S3/042 ,  H01S3/0092 ,  H01S3/0405 ,  H01S3/0632 ,  H01S3/0804 ,  H01S3/08072 ,  H01S3/094076 ,  H01S3/09415 ,  H01S3/1028 ,  H01S3/2383 ,  H01S5/4025 ,  H04N9/3161

摘要： A plane waveguide type laser according to the present invention includes: a plate-shaped laser medium (5); a semiconductor laser (1) which causes excitation light to enter an end surface (5a) of the laser medium (5); first and second claddings (4a and 4b) which are bonded to lower and upper surfaces of the laser medium (5), respectively, to form a waveguide in a vertical direction; a comb heat sink (2) bonded to a lower surface of the first cladding (4a); and thermal lens producing means (20) bonded to an upper surface of the second cladding (4b). In this structure, laser oscillation in the vertical direction is performed in a waveguide mode of the laser medium (5), and the thermal lens producing means (20) forms a periodic lens effect in the laser medium (5) to perform laser oscillation in a lateral direction in a plurality of resonant modes. Therefore, a resonator having a small round-trip loss maybe formed without depending on a size of a thermal lens produced by excitation, and hence a rising characteristic of a pulse operation or a CW operation may be smoothed to obtain high-power stable output.

摘要翻译： 根据本发明的平面波导型激光器包括：板状激光介质（5）; 使激发光进入激光介质（5）的端面（5a）的半导体激光器（1）; 第一和第二包层（4a和4b），其分别结合到激光介质（5）的下表面和上表面，以在垂直方向上形成波导; 结合到第一包层（4a）的下表面的梳形散热器（2）; 以及粘合到第二包层（4b）的上表面的热透镜产生装置（20）。 在这种结构中，在激光介质（5）的波导模式中执行垂直方向的激光振荡，并且热透镜产生装置（20）在激光介质（5）中形成周期性透镜效应，以在 多个谐振模式中的横向方向。 因此，可以在不依赖于通过激励产生的热透镜的尺寸的情况下形成具有小的往返损耗的谐振器，因此可以平滑脉冲操作或CW操作的上升特性以获得高功率稳定的输出。