公开(公告)号：US5836073A

公开(公告)日：1998-11-17

申请号：US548035

申请日：1995-10-25

申请人： Kiminori Mizuuchi ,  Kazuhisa Yamamoto ,  Hisanao Sato

发明人： Kiminori Mizuuchi ,  Kazuhisa Yamamoto ,  Hisanao Sato

IPC分类号： G02F1/35 ,  G02F1/355 ,  G02F1/377 ,  H01P11/00

CPC分类号： G02F1/3558 ,  G02F1/3775 ,  G02F2001/3546 ,  G02F2001/3548 ,  G02F2201/346 ,  G02F2202/20 ,  Y10T29/49016

摘要： An optical wavelength converting device is provided with a LiTaO.sub.3 substrate, a plurality of inverted-polarization layers periodically arranged in an upper surface of the LiTaO.sub.3 substrate, and an optical waveguide crossing the inverted-polarization layers. The upper surface of the LiTaO.sub.3 substrate is directed toward a -X-crystal axis direction. The inverted-polarization layers are formed by exchanging Ta.sup.+ ions of the LiTaO.sub.3 substrate for H.sup.+ ions, and an extending direction of each inverted-polarization layer is inclined at an angle of .theta. degrees (6.ltoreq..theta..ltoreq.174) to the +C-crystal axis direction toward a -Y-crystal axis direction. The optical waveguide is formed by exchanging Ta.sup.+ ions of the LiTaO.sub.3 substrate and the inverted-polarization layers for H.sup.+ ions to set a refractive index of the optical waveguide higher than that of the LiTaO.sub.3 substrate. The optical waveguide extends in a +Y-crystal axis direction. Fundamental waves polarized in a transverse electric mode induce electric field directed in .+-.Y-crystal axis directions and are converted into second harmonic waves in the optical waveguide.

摘要翻译： 光波长转换装置设置有LiTaO 3衬底，周期性地布置在LiTaO 3衬底的上表面中的多个倒置极化层和与反极化层交叉的光波导。 LiTaO3基板的上表面朝向-X晶轴方向。 反相极化层是通过交换Li + TaO 3衬底的H +离子的Ta +离子形成的，并且每个反向偏振层的延伸方向以θ度（6°= 174°）的角度倾斜到 + C晶轴方向朝向-Y晶轴方向。 通过交换LiTaO 3衬底的Ta +离子和H +离子的反向偏振层来形成光波导，以使光波导的折射率高于LiTaO 3衬底的折射率。 光波导沿+ Y晶轴方向延伸。 在横向电模式中极化的基波感应在+/- Y晶轴方向上引导的电场，并在光波导中转换成二次谐波。

公开(公告)号：US5426656A

公开(公告)日：1995-06-20

申请号：US184932

申请日：1994-01-24

申请人： Genji Tohmon ,  Jun Ohya ,  Hisanao Sato ,  Tomoaki Uno

发明人： Genji Tohmon ,  Jun Ohya ,  Hisanao Sato ,  Tomoaki Uno

IPC分类号： H01S3/067 ,  H01S3/094 ,  H01S3/16 ,  H01S3/14

CPC分类号： H01S3/16 ,  H01S2302/00 ,  H01S3/067 ,  H01S3/094092 ,  H01S3/1611

摘要： The optical fiber is doped at the core thereof with Tm ions and Nd ions. When light at a wavelength in a 800-nm band for exciting the Nd ions, is incident upon the optical fiber through an incident portion thereof, the Nd ions emit light at a wavelength in the vicinity of 1,012 .mu.m. Through three excitations by absorption of light emitted from the Nd ions and/or energy transfer from the Nd ions, the Tm ions experience three excitation transitions and reach a third high energy level through first and second high energy levels. Thereafter, the Tm ions experience a radiative transition from the third high energy level, thereby to emit blue light at a wavelength of 480 nm.

摘要翻译： 光纤在其核心掺杂有Tm离子和Nd离子。 当用于激发Nd离子的800nm波长的波长的光通过其入射部分入射到光纤上时，Nd离子发射波长在1012μm附近的光。 通过吸收从Nd离子发射的光和/或来自Nd离子的能量转移的三次激发，Tm离子经历三次激发跃迁，并通过第一和第二高能级达到第三高能级。 此后，Tm离子经历从第三高能量水平的辐射跃迁，由此发射波长为480nm的蓝色光。

公开(公告)号：US5357533A

公开(公告)日：1994-10-18

申请号：US35957

申请日：1993-03-23

申请人： Kiminori Mizuuchi ,  Kazuhisa Yamamoto ,  Makoto Kato ,  Hisanao Sato ,  Hiroaki Yamamoto

发明人： Kiminori Mizuuchi ,  Kazuhisa Yamamoto ,  Makoto Kato ,  Hisanao Sato ,  Hiroaki Yamamoto

IPC分类号： G02F1/37 ,  G02F1/355 ,  G02F1/361 ,  G02F1/377 ,  H01S3/109 ,  H01S5/00 ,  H01S3/10

CPC分类号： B82Y20/00 ,  G02F1/3775 ,  G02F1/3551 ,  G02F1/361 ,  G02F2201/06 ,  G02F2202/20

摘要： The wavelength tolerance of a frequency doubler is enhanced so as to perform stable operation. Further, with the use of this frequency doubler, a laser source can directly modulate a laser. A waveguide and a periodic domain inverted layer are formed on an LiTaO.sub.3 substrate of -C plate, and the waveguide is divided into a plurality of zones having different propagation constants. A fundamental wave inputted in the waveguide is converted into a harmonic wave in each of the zones, and is emitted as SHG light. Parts for modulating the phases of the harmonic waves produced in the respective zones are provided between the zones.

摘要翻译： 提高倍频器的波长容差，从而稳定运行。 此外，通过使用该倍频器，激光源可以直接调制激光器。 在-C板的LiTaO 3衬底上形成波导和周期性畴反转层，并且波导被分成具有不同传播常数的多个区域。 在波导中输入的基波被转换为每个区域中的谐波，并作为SHG光发射。 用于调制在各个区域中产生的谐波的相位的部分设置在这些区域之间。

公开(公告)号：US4677630A

公开(公告)日：1987-06-30

申请号：US671469

申请日：1984-11-14

申请人： Toshihiro Fujita ,  Satoshi Ishizuka ,  Katsuyuki Fujito ,  Hisanao Sato

发明人： Toshihiro Fujita ,  Satoshi Ishizuka ,  Katsuyuki Fujito ,  Hisanao Sato

IPC分类号： H01S5/00 ,  H01S3/082 ,  H01S5/026 ,  H01S5/062 ,  H01S5/065 ,  H01S5/10 ,  H01S5/14 ,  H01S3/18

CPC分类号： H01S5/10 ,  H01S5/026 ,  H01S5/14 ,  H01S5/06213 ,  H01S5/065 ,  H01S5/1021 ,  H01S5/1039 ,  H01S5/141

摘要： A semiconductor laser generating no intensity noise caused by reflected light and oscillating at a single frequency, wherein a cavity resonator is disposed externally of the semiconductor laser in order to suppress the oscillation frequency shift (chirping) of the semiconductor laser possibly induced with current modulation of the same.

摘要翻译： 一种半导体激光器，其不产生由反射光产生的强度噪声并以单个频率振荡，其中空腔谐振器设置在半导体激光器的外部，以便抑制可能由当前调制引起的半导体激光器的振荡频移（啁啾） 一样。

公开(公告)号：US5321708A

公开(公告)日：1994-06-14

申请号：US39772

申请日：1993-03-26

申请人： Genji Tohmon ,  Hisanao Sato ,  Jun Ohya ,  Toshihiro Fujita

发明人： Genji Tohmon ,  Hisanao Sato ,  Jun Ohya ,  Toshihiro Fujita

IPC分类号： C03C4/00 ,  G02B6/00 ,  G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/08 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/17 ,  H01S3/14

CPC分类号： H01S3/06716 ,  H01S3/17 ,  H01S2302/00 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/094065 ,  H01S3/0941 ,  H01S3/1606 ,  H01S3/173 ,  H01S3/176

摘要： A core of a fluorozirconate optical fiber is doped with rare earth ions, namely trivalent Dy ions. The Dy ion makes an absorption transition with excitation light generated by an 800 nm semiconductor laser module. Then the Dy ion undergoes transitions, namely a nonradiative transition involving phonon emission, a transition to a metastable excited level, and a radiative transition wherein radiation corresponding to the 1.28 .mu.m to 1.35 .mu.m range occurs, thereafter returning to its ground state level. The Dy ion having an electrovalence of three can be pumped with a high-output 800 nm semiconductor laser module and is not subject to saturation at a lower energy level of population inversion. Using an optical fiber of the invention, a higher gain is obtained in the region of 1.3 .mu.m telecommunications window.

摘要翻译： 氟锆酸盐光纤的核掺杂有稀土离子，即三价Dy离子。 Dy离子通过800nm半导体激光器模块产生的激发光进行吸收转变。 然后，Dy离子经历转变，即涉及声子发射的非辐射跃迁，到亚稳激发电平的转变，以及辐射跃迁，其中发生对应于1.28μm至1.35μm范围的辐射，然后返回到其基态。 具有三次电流的Dy离子可以用高输出800nm半导体激光器模块泵送，并且在较低的总体反转能量水平下不会饱和。 使用本发明的光纤，在电信窗口的1.3μm区域获得较高的增益。

公开(公告)号：US5453867A

公开(公告)日：1995-09-26

申请号：US107997

申请日：1993-08-18

申请人： Jun Ohya ,  Toshihiro Fujita ,  Hisanao Sato

发明人： Jun Ohya ,  Toshihiro Fujita ,  Hisanao Sato

IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/10 ,  H01S5/06 ,  H04B10/2507 ,  H04B10/54 ,  H04B10/00

CPC分类号： H04B10/2507 ,  H04B10/504

摘要： An analog transmission system for transmitting a multi-channel analog signal including plural carrier signals having different frequencies, comprises: a laser unit responsive to the multi-channel analog signal for emitting laser light signal intensity-modulated by the multi-channel analog signal, the laser unit having an oscillation wavelength W1; an optical fiber amplifier for amplifying the laser light signal with a peak gain at a wavelength W2; an optical fiber for transmitting the amplified laser light; and an optical receiver for receiving the transmitted laser light and for converting the received laser light into an electric signal as an output. In this system, a total distortion characteristic of the laser unit is compensated by distortions developed in the optical fiber amplifier.

摘要翻译： 一种用于发送包括具有不同频率的多个载波信号的多通道模拟信号的模拟传输系统，包括：激光单元，响应于多通道模拟信号，用于发射由多通道模拟信号强度调制的激光信号， 具有振荡波长W1的激光单元; 用于在波长W2处以峰值增益放大激光信号的光纤放大器; 用于传输放大的激光的光纤; 以及用于接收发射的激光并将接收的激光转换为电信号作为输出的光接收器。 在该系统中，通过在光纤放大器中产生的失真来补偿激光单元的总失真特性。

公开(公告)号：US4099091A

公开(公告)日：1978-07-04

申请号：US709529

申请日：1976-07-28

申请人： Hiroshi Yamazoe ,  Hiroshi Kawarada ,  Hisanao Sato ,  Nobumasa Ohshima

发明人： Hiroshi Yamazoe ,  Hiroshi Kawarada ,  Hisanao Sato ,  Nobumasa Ohshima

IPC分类号： H05B33/12 ,  H05B33/22 ,  H05B33/14

CPC分类号： H05B33/12 ,  H05B33/22

摘要： An electroluminescent panel comprising a pair of electrodes having sandwiched therebetween a multi-layer comprising an insulating layer in contact with one of said electrodes, an electroluminescent layer and an intermediate layer formed from a conductive material which is in intimate contact with the electroluminescent layer but is out of contact with both of the electrodes. Due to the provision of the intermediate layer, the brightness of the electroluminescent panel can be kept high for a long time.

摘要翻译： 一种电致发光面板，包括夹在其间的一对电极，多层包括与所述电极中的一个接触的绝缘层，电致发光层和由与电致发光层紧密接触的导电材料形成的中间层， 不与两个电极接触。 由于提供中间层，电致发光面板的亮度可以长时间保持高。

公开(公告)号：US5341237A

公开(公告)日：1994-08-23

申请号：US830311

申请日：1992-01-31

申请人： Genji Tohmon ,  Hisanao Sato ,  Toshihiro Fujita ,  Jun Ohya

发明人： Genji Tohmon ,  Hisanao Sato ,  Toshihiro Fujita ,  Jun Ohya

IPC分类号： H01S3/07 ,  H01S3/06 ,  H01S3/067 ,  H01S3/083 ,  H01S3/16 ,  H01S3/17 ,  H01S3/14

CPC分类号： H01S3/17 ,  H01S3/06716 ,  H01S3/1608 ,  H01S3/1611 ,  H01S3/1613 ,  H01S3/1616 ,  H01S3/1698

摘要： The effective rate of deactivation from the terminal state to the ground state of a rare earth ion doped optical material in a four-level amplifying or lasing scheme may be increased greatly by doping the optical material with two rare earth ions, an activator and a deactivator. Energy transfer occurs between the terminal state in the activator ion and the deactivator ion. The transition from the deactivator to the ground state occurs via phonon emission. By increasing the deactivation rate, the efficiency of the laser and the amplifier is increased.

摘要翻译： 通过掺杂具有两种稀土离子的光学材料，激活剂和失活剂，可以大大增加在四级放大或激光方案中从稀土离子掺杂光学材料的终端状态到基态的失活的有效速率 。 能量转移发生在活化剂离子的末端状态和钝化剂离子之间。 从失活剂到基态的过渡通过声子发射发生。 通过增加去激活率，增加了激光器和放大器的效率。

公开(公告)号：US5506722A

公开(公告)日：1996-04-09

申请号：US387057

申请日：1995-02-10

申请人： Kiminori Mizuuchi ,  Kazuhisa Yamamoto ,  Hisanao Sato

发明人： Kiminori Mizuuchi ,  Kazuhisa Yamamoto ,  Hisanao Sato

IPC分类号： G02F1/35 ,  G02F1/355 ,  G02F1/377 ,  G02F1/37

CPC分类号： G02F1/3558 ,  G02F1/3775 ,  G02F2001/3546 ,  G02F2001/3548 ,  G02F2201/346 ,  G02F2202/20 ,  Y10T29/49016

摘要： An optical wavelength converting device is provided with a LiTaO.sub.3 substrate, a plurality of inverted-polarization layers periodically arranged in an upper surface of the LiTaO.sub.3 substrate, and an optical waveguide crossing the inverted-polarization layers. The upper surface of the LiTaO.sub.3 substrate is directed toward a -X-crystal axis direction. The inverted-polarization layers are formed by exchanging Ta.sup.+ ions of the LiTaO.sub.3 substrate for H.sup.+ ions, and an extending direction of each inverted-polarization layer is inclined at an angle of .theta. degrees (6.ltoreq..theta..ltoreq.174) to the +C-crystal axis direction toward a -Y-crystal axis direction. The optical waveguide is formed by exchanging Ta.sup.+ ions of the LiTaO.sub.3 substrate and the inverted-polarization layers for H.sup.+ ions to set a refractive index of the optical waveguide higher than that of the LiTaO.sub.3 substrate. The optical waveguide extends in a +Y-crystal axis direction. Fundamental waves polarized in a transverse electric mode induce electric field directed in .+-.Y-crystal axis directions and are converted into second harmonic waves in the optical waveguide.

摘要翻译： 光波长转换装置设置有LiTaO 3衬底，周期性地布置在LiTaO 3衬底的上表面中的多个倒置极化层和与反极化层交叉的光波导。 LiTaO3基板的上表面朝向-X晶轴方向。 通过交换Li + TaO 3衬底的H +离子的Ta +离子形成反向偏振层，并且每个反向偏振层的延伸方向以θ度（6°= 174°）的角度倾斜到 + C晶轴方向朝向-Y晶轴方向。 通过交换LiTaO 3衬底的Ta +离子和H +离子的反向偏振层来形成光波导，以使光波导的折射率高于LiTaO 3衬底的折射率。 光波导沿+ Y晶轴方向延伸。 在横向电模式中极化的基波感应在+/- Y晶轴方向上引导的电场，并在光波导中转换成二次谐波。