公开(公告)号：US20090161045A1

公开(公告)日：2009-06-25

申请号：US12226902

申请日：2007-04-27

申请人： Satoshi Kawamoto ,  Eiichi Takahashi ,  Kouichi Kizu ,  Toru Takaoka ,  Michio Tsugawa ,  Ryouichi Seki ,  Shiro Shichijyo ,  Yoshikazu Yamada ,  Akira Sakai

发明人： Satoshi Kawamoto ,  Eiichi Takahashi ,  Kouichi Kizu ,  Toru Takaoka ,  Michio Tsugawa ,  Ryouichi Seki ,  Shiro Shichijyo ,  Yoshikazu Yamada ,  Akira Sakai

IPC分类号： G02F1/13363 ,  G02B1/08 ,  G02F1/1335 ,  G02B5/30

CPC分类号： G02B5/3083 ,  G02B5/3033 ,  G02F1/13363 ,  G02F2001/133637 ,  G02F2202/40 ,  G02F2413/04 ,  Y10T428/1041

摘要： The present invention is to provide a method of compensating the wavelength dependence of birefringence of an optical part (B) which comprises using a film (a) made of a (co)polymer (α) obtained from at least one olefin selected among 4-methyl-1-pentene, 3-methyl-1-pentene, and 3-methyl-1-butene as a (co)monomer ingredient.

摘要翻译： 本发明提供一种补偿光学部件（B）的双折射的波长依赖性的方法，该方法包括使用由选自以下的至少一种烯烃获得的（共）聚合物（α）制成的膜（a） 甲基-1-戊烯，3-甲基-1-戊烯和3-甲基-1-丁烯作为（共）单体成分。

公开(公告)号：US20050084199A1

公开(公告)日：2005-04-21

申请号：US10504983

申请日：2003-02-21

申请人： Junji Hirohashi ,  Shiro Shichijyo

发明人： Junji Hirohashi ,  Shiro Shichijyo

IPC分类号： G02F1/355 ,  G02B6/12

CPC分类号： G02F1/3558

摘要： A ferroelectric substrate periodically poled structure manufacturing method for periodically reversing the polarization direction by applying an electric field between electrodes on the both surfaces of the ferroelectric substrate. An electric field is applied to a portion between the electrodes in a direction different from the spontaneous direction. Next, a step of applying the electric field in the same direction as the spontaneous polarization is performed at least once. After this, the electric field is applied in the direction different from the spontaneous polarization.

摘要翻译： 铁电基板周期性极化结构制造方法，用于通过在铁电体基板的两个表面上的电极之间施加电场来周期性地反转极化方向。 在与自发方向不同的方向上的电极之间施加电场。 接下来，进行与自发极化相同的方向施加电场的步骤至少一次。 之后，电场沿着与自发极化不同的方向施加。

公开(公告)号：US06744554B2

公开(公告)日：2004-06-01

申请号：US09950558

申请日：2001-09-11

申请人： Shiro Shichijyo ,  Kazuhiro Yamada

发明人： Shiro Shichijyo ,  Kazuhiro Yamada

IPC分类号： G02F202

CPC分类号： G02F1/353 ,  G02F1/093 ,  G02F2001/3542 ,  G02F2001/3548 ,  G02F2203/02 ,  G02F2203/06

摘要： A wavelength conversion apparatus includes: multiplexer that multiplexes pumped light and signal light; wavelength conversion element that wavelength-converts linearly polarized light components in x direction with respect to the pumped light and the signal light, and generates output light polarized in x direction; and light circulator that allows the light of the multiplexer to be output to the wavelength conversion element and allow the light from the wavelength conversion element to be output to the port; reflecting mirror; and Faraday rotator that makes a polarization direction difference of 90 degrees between light traveling from the wavelength conversion element to the reflecting mirror and light reflected at the reflecting mirror so as to return to the wavelength conversion element. Intensity IL of the output light does not depend on the incident polarization angle &phgr; of the signal light &lgr;s and is constant.

摘要翻译： 波长转换装置包括：复用多路复用泵浦光和信号光; 波长转换元件，其相对于泵浦光和信号光在x方向上波长转换线偏振光分量，并产生在x方向偏振的输出光; 以及光环行器，其允许多路复用器的光输出到波长转换元件，并允许来自波长转换元件的光输出到端口; 反射镜; 和法拉第旋转器，其使得从波长转换元件传播到反射镜的光的偏振方向差为90度，并且在反射镜处反射的光返回到波长转换元件。 输出光的强度IL不依赖于信号光兰德的入射偏振角度phi并且是恒定的。

公开(公告)号：US5943350A

公开(公告)日：1999-08-24

申请号：US869772

申请日：1997-06-05

申请人： Shiro Shichijyo

发明人： Shiro Shichijyo

IPC分类号： G02F1/35 ,  G02F1/37 ,  H01S3/109 ,  H01S3/10

CPC分类号： G02F1/37 ,  H01S3/109 ,  G02F2001/3509 ,  G02F2001/3542

摘要： An object of the invention is to provide a laser light generating apparatus capable of minimizing loss in a resonator to give a high efficiency of wavelength conversion. A resonator comprises two reflecting mirrors 1 and 2 arranged in linear relationship and a non-linear optical crystal 3 disposed in the resonator. The non-linear optical crystal 3 is formed in a trapezoid shape so that a pair of input and output sides opposite to each other are tilted with respect to the optical propagation axis. The fundamental laser light is introduced along the optical propagation axis into the optical resonator, converted to a second harmonic by the non-linear crystal 3, and released outside from the reflecting mirror 2. It is made possible to adjust the beam diameter and convergence angle of the laser light on the light incidence plane(Y-Z plane) when the laser light passes the input and output sides of the non-linear optical crystal 3. For example, the incident plane is made to be consistent with a plane where the acceptance angle of the non-linear optical crystal 3 is limited to a small degree, thus increasing the efficiency of wavelength conversion.

摘要翻译： 本发明的目的是提供一种激光发生装置，其能够最小化谐振器的损耗，从而提供高效率的波长转换。 谐振器包括以线性关系布置的两个反射镜1和2以及设置在谐振器中的非线性光学晶体3。 非线性光学晶体3形成为梯形，使得彼此相对的一对输入和输出侧相对于光学传播轴线倾斜。 基本激光沿着光传播轴被引入到光学谐振器中，通过非线性晶体3转换成二次谐波，并从反射镜2释放出外部。可以调整光束直径和会聚角度 的激光通过非线性光学晶体3的输入和输出侧时的入射平面（YZ平面）上的激光。例如，使入射面与接受角度的平面一致 非线性光学晶体3被限制在很小程度，从而提高了波长转换的效率。

公开(公告)号：US5809048A

公开(公告)日：1998-09-15

申请号：US871065

申请日：1997-07-09

申请人： Shiro Shichijyo ,  Kiyofumi Muro

发明人： Shiro Shichijyo ,  Kiyofumi Muro

IPC分类号： G02F1/35 ,  G02F1/37 ,  H01S3/082 ,  H01S3/094 ,  H01S3/098 ,  H01S3/102 ,  H01S3/109 ,  H01S5/065 ,  H01S5/14 ,  H01S3/13

CPC分类号： H01S3/08036 ,  H01S3/1022 ,  H01S3/109 ,  H01S5/065 ,  G02F1/3534 ,  G02F1/37 ,  H01S3/08054 ,  H01S3/082 ,  H01S3/094065 ,  H01S3/09415 ,  H01S3/1062 ,  H01S3/108 ,  H01S3/1611 ,  H01S3/1673 ,  H01S5/14 ,  H01S5/141

摘要： A short wavelength light source mainly comprises a semiconductor laser for pumping a laser medium, a birefringence filter for controlling or stabilizing the waveform by applying an optical feedback to the semiconductor laser to feed back only light of specific wavelength, lens systems for focusing the pumping light, and an optical resonator composed of a laser medium formed of Nd:YAG doped with 1% of Nd and a nonlinear optical element formed of KNbO.sub.3. The birefringence filter is structured as a Lyot filter, and is composed of a birefringence element made of 2 mm thick non-doped YVO.sub.4, a polarizer, and a birefringence element made of 4 mm thick non-doped YVO.sub.4. This constitution realizes a short wavelength light source achieving a single longitudinal mode oscillation while maintaining a high output, small in size, superior in efficiency, and excellent in wavelength stability.

摘要翻译： 短波长光源主要包括用于泵浦激光介质的半导体激光器，用于通过向半导体激光器施加光反馈以仅反馈特定波长的光来控制或稳定波形的双折射滤光器，用于聚焦泵浦光的透镜系统 以及由掺杂有1％Nd的Nd：YAG和由KNbO 3形成的非线性光学元件形成的激光介质的光谐振器。 双折射滤光器被构造为Lyot滤光器，由由2mm厚的非掺杂YVO4构成的双折射元件，偏振片和由4mm厚的非掺杂YVO4制成的双折射元件构成。 该结构实现短波长光源，实现单一纵模振荡，同时保持高输出，尺寸小，效率优异，波长稳定性优异。