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    • 21. 发明授权
    • Laser apparatus and method of driving diffraction grating
    • 激光装置及驱动衍射光栅的方法
    • US07366221B2
    • 2008-04-29
    • US11383854
    • 2006-05-17
    • Tomiji TanakaHiroyuki YamagataMasaki Chiba
    • Tomiji TanakaHiroyuki YamagataMasaki Chiba
    • H01S3/08
    • H01S5/141H01S5/02248H01S5/02288H01S5/0687H01S5/32341
    • A laser apparatus is disclosed. The laser apparatus has a diffraction grating that receives laser light from a semiconductor laser, emits first order diffracted light having a predetermined wavelength to the semiconductor laser, and reflects zero-th order light, a reflection section that reflects the zero-th order light reflected by the diffraction grating, a hold section that holds the diffraction grating and the reflection section while an open angle of the diffraction grating and the reflection section is kept constant, the hold section being rotatable with a fulcrum of an intersection of an extended line of a front surface of the diffraction grating and an extended line of a front surface of the reflection section, and a linear drive section that rotates the hold section with a linear motion of a piezoelectric device that expands and shrinks by the piezoelectric effect.
    • 公开了一种激光装置。 激光装置具有从半导体激光器接收激光的衍射光栅,向半导体激光器照射具有预定波长的一级衍射光,并反射零级光,反射零反射光的反射部 通过所述衍射光栅,所述保持部保持所述衍射光栅和所述反射部,同时所述衍射光栅和所述反射部的开放角度保持恒定,所述保持部能够与所述衍射光栅和所述反射部的延长线的交叉点的支点旋转, 衍射光栅的前表面和反射部分的前表面的延伸线,以及线性驱动部分,其通过由压电效应而膨胀和收缩的压电器件的线性运动来旋转保持部分。
    • 23. 发明授权
    • Thermomagnetic recording method applying power modulated laser on a
magnetically coupled double layer structure of perpendicular anisotropy
film
    • 将功率调制激光应用于垂直各向异性膜的磁耦合双层结构的热磁记录方法
    • US4955007A
    • 1990-09-04
    • US087440
    • 1987-08-20
    • Katsuhisa ArataniTomiji Tanaka
    • Katsuhisa ArataniTomiji Tanaka
    • G11B11/105G11B11/14G11B13/04
    • G11B11/10515G11B11/10506G11B11/10521G11B11/10586
    • Thermomagnetic recording method using a thermomagnetic recording medium having a superposed layer of magnetically coupled first and second magnetic thin films is disclosed. The magnetic thin film includes a portion where the respective magnetic moments of the first and second thin films are coupled in opposite directions to each other. The method comprises heating the superposed layer in a first heating state in which the superposed layer is heated at a temperature T.sub.1 which is higher than the Curie temperature T.sub.C1 of the first magnetic thin film and will not cause the inversion of the magnetic moment of the second magnetic thin film or in a second heating state in which the superimposed layer is heated at a temperature T.sub.2 which is higher than the Curie temperature T.sub.C1 and is high enough to cause the inversion of the magnetic moment of the second magnetic thin film by modulating heating condition according to an information signal to be recorded; and forming recording magnetization on the thermomagnetic recording medium by cooling the heated superimposed layer of the thermomagnetic recording medium. In the method, real-time overwriting information can be achieved without using a modulated external magnetic field.
    • 公开了使用具有磁耦合的第一和第二磁性薄膜叠层的热磁记录介质的热磁记录方法。 磁性薄膜包括其中第一和第二薄膜的相应磁矩彼此相反的方向耦合的部分。 该方法包括在第一加热状态下加热叠加层,其中叠加层在高于第一磁性薄膜的居里温度TC1的温度T1下被加热,并且不会引起第二磁性层的磁矩的反转 磁性薄膜或第二加热状态,其中叠加层在高于居里温度TC1的温度T2下被加热并且通过调节加热条件足够高以引起第二磁性薄膜的磁矩的反转 根据要记录的信息信号; 以及通过冷却所述热磁记录介质的加热叠加层,在所述热磁记录介质上形成记录磁化。 在该方法中,可以在不使用调制的外部磁场的情况下实现实时重写信息。
    • 27. 发明授权
    • Wavelength determining apparatus, wavelength determining method, semiconductor laser controlling apparatus, and semiconductor laser controlling method
    • 波长确定装置,波长确定方法,半导体激光器控制装置和半导体激光器控制方法
    • US07570678B2
    • 2009-08-04
    • US11110056
    • 2005-04-20
    • Tomiji Tanaka
    • Tomiji Tanaka
    • H01S3/13G01B9/02
    • H01S5/0687G01J9/0246H01S5/0683H01S5/141
    • A wavelength determining apparatus is disclosed. The wavelength determining apparatus includes a reflection block, a light detection block, and a determination block. The reflection block receives at least part of a laser light beam emitted from an external cavity type semiconductor laser and emits a reflected light beam that has a distribution of light intensities of fringes. The light detection block detects the intensity of the light beam reflected from the reflection block in two or more light reception positions. The determination block obtains a difference value of detection signals in the two or more light reception positions and determines the wavelength of the laser light beam on the basis of the difference value. The two or more light reception positions are arranged in the direction of which the fringes take place.
    • 公开了一种波长确定装置。 波长确定装置包括反射块,光检测块和确定块。 反射块接收从外腔型半导体激光器发射的激光束的至少一部分,并发射具有条纹光强度分布的反射光束。 光检测块检测在两个或更多个光接收位置中从反射块反射的光束的强度。 确定块获得两个或更多个光接收位置中的检测信号的差值,并且基于差值确定激光束的波长。 两个或更多个光接收位置沿条纹发生的方向排列。
    • 28. 发明申请
    • Laser system
    • 激光系统
    • US20070036185A1
    • 2007-02-15
    • US10573180
    • 2004-11-12
    • Tomiji Tanaka
    • Tomiji Tanaka
    • H01S3/04H01S3/08
    • H01S5/024H01S3/1055H01S5/02208H01S5/02236H01S5/02248H01S5/02415H01S5/02438H01S5/141
    • A laser system 1 is composed of a temperature control section 12 that has a Peltier device 9, a heat sink 10, and a base plate 11; and a laser section 8 that has a laser diode 2, a lens 3, a grating 5, a first support member 5, and second support member 6. The heat sink 10 is connected to the base plate 11 and is perpendicular thereto. The Peltier device 9 is connected to the heat sink 10. The second support member 6 of the laser section 8 is connected to the Peltier device 9 so that one surface of the Peltier device 9 is connected to the heat sink 10 and the other surface of the Peltier device 9 is connected to the second support member 6. Heat generated in the laser diode 2, the lens 3, the first support member 5, and so forth, which compose an external cavity type semiconductor laser, is transmitted through the second support member 6, the Peltier device 9, the heat sink 10, and the base plate 11. When the distance by which the base plate 11 and the laser section 8 are spaced apart is a predetermined value or more, heat transmitted to the laser section 8 can be effectively blocked.
    • 激光系统1由具有珀耳帖装置9,散热器10和基板11的温度控制部12构成。 以及具有激光二极管2,透镜3,光栅5,第一支撑部件5和第二支撑部件6的激光部8。 散热片10与基板11连接并与其垂直。 珀耳帖装置9连接到散热器10。 激光部8的第二支撑部件6与珀耳帖装置9连接,使得珀耳帖装置9的一个面与散热片10连接,珀耳帖装置9的另一个面与第二支承部件6连接 。 在构成外腔型半导体激光器的激光二极管2,透镜3,第一支撑构件5等中产生的热量通过第二支撑构件6,珀耳帖装置9,散热片10, 和基板11。 当基板11和激光部8间隔开的距离为预定值以上时,能够有效地阻止传递到激光部8的热。
    • 29. 发明申请
    • LASER APPARATUS
    • 激光装置
    • US20060285125A1
    • 2006-12-21
    • US11425005
    • 2006-06-19
    • Tomiji TanakaKageyasu SakoRyo Kasegawa
    • Tomiji TanakaKageyasu SakoRyo Kasegawa
    • G01B9/02
    • G01J9/0246
    • A laser apparatus is disclosed. An optical element receives at least a part of laser light emitted from a laser generation source and generates interference fringes. Each of first and second two-divided detectors has two detectors arranged in the direction of which the interference fringes appear. Each of the detectors detects an amount of light of the interference fringes. These two-divided detectors are spaced apart for an odd-number multiple of nearly ¼ period of interference fringes and disposed on a plane perpendicular to an optical path of the interference fringes. Each of first and second calculation sections calculates a first difference signal of detection signals of two detectors of the two-divided detector. A selection section selects one of the first and second difference signals. A determination section determines a wavelength of the laser light corresponding to a value of the difference signal selected from the first and second difference signals.
    • 公开了一种激光装置。 光学元件接收从激光发生源发射的至少一部分激光,并产生干涉条纹。 第一和第二二分割检测器中的每一个具有布置在干涉条纹出现的方向上的两个检测器。 每个检测器检测干涉条纹的光量。 这两个分开的检测器间隔开几个1/4的干涉条纹的奇数倍,并设置在与干涉条纹的光路垂直的平面上。 第一和第二计算部分中的每一个计算双分割检测器的两个检测器的检测信号的第一差分信号。 选择部分选择第一和第二差分信号之一。 确定部分确定与从第一和第二差分信号中选择的差分信号的值相对应的激光的波长。