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    • 3. 发明申请
    • PLANE WAVEGUIDE TYPE LASER AND DISPLAY DEVICE
    • 平面波形激光和显示设备
    • US20110255562A1
    • 2011-10-20
    • US13141910
    • 2009-02-05
    • Shuhei YamamotoYosuke AkinoTakayuki YanagisawaYoshihito Hirano
    • Shuhei YamamotoYosuke AkinoTakayuki YanagisawaYoshihito Hirano
    • H01S3/10H01S3/13
    • H01S3/042H01S3/0092H01S3/0405H01S3/0632H01S3/0804H01S3/08072H01S3/094076H01S3/09415H01S3/1028H01S3/2383H01S5/4025H04N9/3161
    • 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.
    • 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。
    • 6. 发明申请
    • Mode Control Waveguide Laser Device
    • 模式控制波导激光设备
    • US20080095202A1
    • 2008-04-24
    • US11579454
    • 2005-03-30
    • Takayuki YanagisawaYoshihito HiranoSyuhei YamamotoMasao ImakiKiyohide SakaiYasuharu Koyata
    • Takayuki YanagisawaYoshihito HiranoSyuhei YamamotoMasao ImakiKiyohide SakaiYasuharu Koyata
    • H01S3/063
    • H01S3/0632H01S3/0405H01S3/0612H01S3/08072H01S3/094053H01S3/09415H01S3/109
    • 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).
    • 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。
    • 7. 发明授权
    • Differential absorption lidar apparatus having multiplexed light signals with two wavelengths in a predetermined beam size and beam shape
    • 差分吸收激光雷达装置具有预定光束尺寸和光束形状的具有两个波长的多路复用光信号
    • US07361922B2
    • 2008-04-22
    • US11500902
    • 2006-08-09
    • Shunpei KameyamaYoshihito Hirano
    • Shunpei KameyamaYoshihito Hirano
    • G01N15/06
    • G01S7/491G01N21/3504G01N2021/4709G01S7/4802G01S17/32G01S17/88G01S17/89
    • 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.
    • 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。
    • 8. 发明申请
    • Laser Beam Path Length Difference Detector, Laser Phase Controller, and Coherent Optical Coupler
    • 激光束路径长度差分检测器,激光相位控制器和相干光耦合器
    • US20080031292A1
    • 2008-02-07
    • US11631308
    • 2004-09-13
    • Jiro SuzukiYoshihito HiranoYutaka EzakiYasushi Horiuchi
    • Jiro SuzukiYoshihito HiranoYutaka EzakiYasushi Horiuchi
    • H01S3/13G01B9/02G01J9/00G01M11/00
    • H01S3/2383G01J9/0246H01S3/005
    • 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.
    • 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)。