公开(公告)号：US20100303120A1

公开(公告)日：2010-12-02

申请号：US12675125

申请日：2007-08-30

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

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

IPC分类号： H01S3/06

CPC分类号： H01S3/0632 ,  H01S3/0405 ,  H01S3/0606 ,  H01S3/0615 ,  H01S3/0621 ,  H01S3/0625 ,  H01S3/09415 ,  H01S3/109 ,  H01S3/2383 ,  H01S5/4031 ,  H01S2301/02

摘要： To suppress the amplification of spontaneous emission light in a principal plane width direction to thereby suppress a gain in directions other than a beam axis direction and output a high-power laser, in a solid-state laser element of a plane waveguide type that causes a fundamental wave laser beam to oscillate in a beam axis direction in a laser medium of a flat shape and forms a waveguide structure in a thickness direction as a direction perpendicular to a principal plane of the flat shape in the laser medium, inclined sections 12 are provided on both sides of the laser medium, the inclined sections 12 inclining a predetermined angle to reflect spontaneous emission light in the laser medium to a principal plane side of the flat shape, the spontaneous emission light traveling in the beam axis direction and a principal plane width direction as a direction perpendicular to the thickness direction.

摘要翻译： 为了抑制在主平面宽度方向上的自发发射光的放大，从而抑制波束轴方向以外的方向的增益并输出大功率激光，在平面波导型的固体激光元件中， 基波激光束在平坦形状的激光介质中在光束轴方向上振荡，并且在激光介质中形成作为与平面形状的主平面垂直的方向的厚度方向的波导结构，设置倾斜部12 在激光介质的两侧，倾斜部分12倾斜预定角度以将激光介质中的自发发射光反射到平面形状的主平面侧，在射束轴线方向上行进的自发射光和主平面宽度 方向作为垂直于厚度方向的方向。

公开(公告)号：US20100303108A1

公开(公告)日：2010-12-02

申请号：US12677827

申请日：2007-09-12

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

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

IPC分类号： H01S3/10

CPC分类号： G02F1/3544 ,  G02F1/3775 ,  H01S3/0092

摘要： A wavelength converting element that is of a planar waveguide type, includes a plate-like nonlinear optical material, and performs a wavelength conversion on a fundamental wave of a laser beam by propagating the fundamental wave in a plurality of laser oscillation modes in a direction perpendicular to a main surface of the plate-like nonlinear optical material, the direction being perpendicular to an optical axis, wherein periods of polarization inversions of the nonlinear optical material are changed so that each of the periods has a width of a phase matching band A that includes phase matching conditions of at least two of the plurality of laser oscillation modes and so that a non-polarization-inversion region and a polarization inversion region are formed in the nonlinear optical material.

摘要翻译： 平面波导型的波长转换元件包括板状非线性光学材料，并且通过在垂直方向上以多个激光振荡模式传播基波来对激光束的基波进行波长转换 到板状非线性光学材料的主表面，其方向垂直于光轴，其中改变非线性光学材料的偏振反转周期，使得每个周期具有相位匹配带A的宽度， 包括多个激光振荡模式中的至少两个的相位匹配条件，并且在非线性光学材料中形成非极化反转区域和极化反转区域。

公开(公告)号：US20080095202A1

公开(公告)日：2008-04-24

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： H01S3/063

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：US07361922B2

公开(公告)日：2008-04-22

申请号：US11500902

申请日：2006-08-09

申请人： Shunpei Kameyama ,  Yoshihito Hirano

发明人： Shunpei Kameyama ,  Yoshihito Hirano

IPC分类号： G01N15/06

CPC分类号： G01S7/491 ,  G01N21/3504 ,  G01N2021/4709 ,  G01S7/4802 ,  G01S17/32 ,  G01S17/88 ,  G01S17/89

摘要： A differential absorption lidar includes: a light signal generation unit for generating first, second CW light signals with first, second wavelengths having different absorption coefficients with respect to a target, a light intensity modulation unit for subjecting the first, second CW light signal to intensity modulation with a first, second CW modulation signal having a first, second frequency in a baseband, a radiation unit for multiplexing the first, second CW light signals with the intensity modulated, forming the multiplexed light signals with two wavelengths in a predetermined beam size, and radiating the light signals, a reception unit for directly detecting scattered light from the target and converting the scattered light into an electrical signal, and a signal processing unit for extracting only the first, second frequency components from the electric signal, and detecting the concentration of the target from a difference in an amplitude of time wavelengths between two signals.

摘要翻译： 差分吸收激光雷达包括：光信号产生单元，用于产生具有相对于目标的不同吸收系数的第一，第二波长的第一CW光信号;光强度调制单元，用于使第一，第二CW光信号强度 具有在基带中具有第一，第二频率的第一，第二CW调制信号的调制，用于将第一，第二CW光信号与强度调制多路复用的辐射单元，以预定的光束尺寸的两个波长形成复用的光信号， 并且发射光信号;接收单元，用于直接检测来自目标的散射光并将散射光转换为电信号;以及信号处理单元，用于仅从电信号中提取第一，第二频率分量，并检测浓度 从两个信号之间的时间波长的幅度的差异来看 ls。

公开(公告)号：US20080031292A1

公开(公告)日：2008-02-07

申请号：US11631308

申请日：2004-09-13

申请人： Jiro Suzuki ,  Yoshihito Hirano ,  Yutaka Ezaki ,  Yasushi Horiuchi

发明人： Jiro Suzuki ,  Yoshihito Hirano ,  Yutaka Ezaki ,  Yasushi Horiuchi

IPC分类号： H01S3/13 ,  G01B9/02 ,  G01J9/00 ,  G01M11/00

CPC分类号： H01S3/2383 ,  G01J9/0246 ,  H01S3/005

摘要： Provided are a small-sized, low-cost, and easy-to-use laser optical path length difference detecting device, a laser optical path length difference detecting device, and a coherent optical coupling device. The laser optical path length difference detecting device detects an optical path length difference between propagation paths of a first laser beam (1) and a second laser beam (2), which are mutually coherent when the beams are propagated through two arbitrary optical paths of a plurality of laser beam optical paths. The laser optical path length difference detecting device is provided with an optical path length difference variable means (4) for changing the optical path length difference between the first laser beam (1) and the second laser beam (2), a wavefront inclination generating means (5) for inclining a wavefront of at least one of the first laser beam (1) and the second laser beam (2), and a two-dimensional detector (6) for detecting the interference light intensity distribution of the first laser beam (1) and the second laser beam (2) which have passed through the wavefront inclination generating means.

摘要翻译： 提供了一种小尺寸，低成本，易于使用的激光光路长度差检测装置，激光光路长度差检测装置和相干光耦合装置。 激光光路长度差检测装置检测当第一激光束（1）和第二激光束（2）的传播路径之间的光路长度差异，当光束通过两 多个激光束光路。 激光光路长度差检测装置设置有用于改变第一激光束（1）和第二激光束（2）之间的光程长度差的光路长度差可变装置（4），波前倾斜产生装置 （5），用于倾斜第一激光束（1）和第二激光束（2）中的至少一个的波前;以及二维检测器（6），用于检测第一激光束的干涉光强度分布 1）和通过波前倾斜产生装置的第二激光束（2）。

公开(公告)号：US07239654B2

公开(公告)日：2007-07-03

申请号：US10250454

申请日：2002-10-31

申请人： Masao Imaki ,  Syuhei Yamamoto ,  Youhei Mikami ,  Yoshihito Hirano ,  Makoto Satou ,  Kenji Masuda ,  Yasunori Nishimura ,  Yuji Masuyama

发明人： Masao Imaki ,  Syuhei Yamamoto ,  Youhei Mikami ,  Yoshihito Hirano ,  Makoto Satou ,  Kenji Masuda ,  Yasunori Nishimura ,  Yuji Masuyama

IPC分类号： H01S3/10

CPC分类号： H01S5/0687 ,  G01J9/00 ,  G02B1/02 ,  G02B5/3083 ,  G02B27/288 ,  H01S5/0612 ,  H01S5/0683

摘要： On a plate of birefringent crystal made of an LiNbO3 crystal or an LiTaO3 crystal, a conductive substance is adhered to the whole periphery of side surfaces of the plate that intersect an incident surface of a laser beam, thereby to form a wave plate. A polarizer is provided at the latter stage of the wave plate. A wavelength is monitored based on an output from the polarizer. With this arrangement, based on the use of the LiNbO3 crystal or the LiTaO3 crystal that can be manufactured by a large quantity at low cost, it is possible to obtain polarization characteristics and wavelength discrimination characteristics that are stable against environmental changes such as temperature and external stress, by suppressing the pyroelectric effect and the piezoelectric effect of these materials.

摘要翻译： 在由LiNbO 3·结晶或LiTaO 3·结晶制成的双折射晶体平板上，导电物质附着在板的侧表面的整个周边， 激光束的入射面，从而形成波片。 在波片的后段提供偏振器。 基于偏振器的输出监视波长。 利用这种布置，基于可以以低成本大量制造的LiNbO 3/3结晶或LiTaO 3·结晶的用途，可以获得极化 通过抑制这些材料的热电效应和压电效应，对温度和外部应力等环境变化稳定的特性和波长辨别特性。

公开(公告)号：US07151882B2

公开(公告)日：2006-12-19

申请号：US10532811

申请日：2003-01-31

申请人： Jiro Suzuki ,  Yoshihito Hirano ,  Toshiyuki Ando ,  Yasuhisa Tamagawa

发明人： Jiro Suzuki ,  Yoshihito Hirano ,  Toshiyuki Ando ,  Yasuhisa Tamagawa

IPC分类号： G02B6/00

CPC分类号： G02B6/4206 ,  G02B6/32 ,  G02B6/4246 ,  H04B10/118

摘要： An optical antenna includes an optical element mount (3) for mounting fiber ends (1a and 2a) of optical fibers (1 and 2) at different positions; and an optical transmitting and receiving system (4) for collimating, when laser beams are radiated from the fiber ends (1a and 2a), the laser beams to parallel light rays toward the space, and for focusing, when laser beams arrive from the space, the laser beams onto the fiber ends (1a and 2a) This makes it possible to set two optical transmitting and receiving directions 5 and 6 without installing complicated mechanical elements.

摘要翻译： 光学天线包括用于在不同位置安装光纤（1和2）的光纤端部（1a和2a）的光学元件安装件（3） 以及光学发射和接收系统（4），用于当激光束从光纤端部（1a和2a）辐射时，将激光束平行射向空间并用于聚焦，当激光束从 该空间，激光束到纤维端部（1a和2a）上，这使得可以在不安装复杂的机械元件的情况下设置两个光学发射和接收方向5和6。

公开(公告)号：US06901102B1

公开(公告)日：2005-05-31

申请号：US09576315

申请日：2000-05-22

申请人： Takayuki Yanagisawa ,  Yoshihito Hirano

发明人： Takayuki Yanagisawa ,  Yoshihito Hirano

IPC分类号： H01S3/081 ,  H01S3/00 ,  H01S3/08 ,  H01S3/083 ,  H01S3/107 ,  H01S3/23

CPC分类号： H01S3/10092 ,  H01S3/005 ,  H01S3/08059 ,  H01S3/0816 ,  H01S3/083 ,  H01S3/1075

摘要： A standing wave self-compensating laser resonator for preventing the utilization efficiency of a laser beam from being lowered, while at the same time, improving the quality of the laser beam wherein, a first reflecting apparatus 21 having first and second reflecting surfaces 21a, 21b disposed at a right angle to each other and a second reflecting apparatus 22 having third and fourth reflecting surfaces 22a, 22b disposed at a right angle to each other face each other such that ridges 21c, 22c are orthogonal, a third reflecting apparatus 123 having two reflecting surfaces which are approximately parallel to and face from each other is provided between the second reflecting surface 21b and fourth reflecting surface 22b, a laser medium 23 is provided between the first reflecting surface 21a and third reflecting surface 22a, and the laser beam is not incident on the ridges 21c, 22c.

摘要翻译： 一种用于防止激光束的利用效率降低的驻波自补偿激光谐振器，同时提高激光束的质量，其中，具有第一反射面21a和第二反射面21a的第一反射装置21， 21b彼此成直角地配置，第二反射装置22具有彼此成直角配置的第三和第四反射面22a，22b，使得脊21c，22c正交， 在第二反射面21b和第四反射面22b之间设置有具有大致平行且彼此相对的两个反射面的第三反射装置123，在第一反射面21a和第三反射面21b之间设置有激光介质23 表面21a，并且激光束不入射到脊21c，22c上。

公开(公告)号：US06836489B2

公开(公告)日：2004-12-28

申请号：US10288546

申请日：2002-11-06

申请人： Tetsuya Nishimura ,  Mitsunobu Gotoda ,  Yoshihito Hirano ,  Masao Imaki

发明人： Tetsuya Nishimura ,  Mitsunobu Gotoda ,  Yoshihito Hirano ,  Masao Imaki

IPC分类号： H01S310

CPC分类号： H01S5/06256 ,  H01S5/0617 ,  H01S5/0687

摘要： An oscillation state of a semiconductor laser is decided. Injection current to the first and second light reflectors of the semiconductor laser are simultaneously swept based on the oscillation state of the semiconductor laser to obtain current conditions of the injection current to the first and second light reflectors that carry out single-mode oscillation in a target wavelength. The semiconductor laser is drive controlled with the obtained current conditions.

公开(公告)号：US06567437B1

公开(公告)日：2003-05-20

申请号：US09617089

申请日：2000-07-14

申请人： Masao Imaki ,  Yoshihito Hirano ,  Makoto Satou ,  Kenji Masuda ,  Takeshi Nakamura

发明人： Masao Imaki ,  Yoshihito Hirano ,  Makoto Satou ,  Kenji Masuda ,  Takeshi Nakamura

IPC分类号： H01S313

CPC分类号： H01S5/0687 ,  G01J9/00

摘要： A wavelength monitoring device comprising: a polarization state changing means having a first birefringent crystal, which inputs a polarized laser light and changes the polarization state of the input laser light after it is transmitted through the first birefringent crystal, in accordance with the wavelength of the input laser light, a polarized light selecting and receiving means, which inputs the laser light transmitted through the polarization state changing means and selectively receives a predetermined linearly polarized component, and a wavelength detection means for monitoring the wavelength of the laser light input to the first birefringent crystal by use of an optical signal output from the polarized light selecting and receiving means.

摘要翻译： 一种波长监视装置，包括：具有第一双折射晶体的偏振状态改变装置，其输入偏振激光，并且在透射通过第一双折射晶体之后改变输入激光的偏振状态，根据 输入激光，偏振光选择和接收装置，其输入透射通过偏振状态改变装置的激光并选择性地接收预定的线偏振分量;以及波长检测装置，用于监测输入到第一像素的激光的波长 通过使用从偏振光选择和接收装置输出的光信号来实现双折射晶体。