公开(公告)号：US20110038032A1

公开(公告)日：2011-02-17

申请号：US12989382

申请日：2009-04-21

申请人： Ken-ichiro Maki ,  Chiko Otani

发明人： Ken-ichiro Maki ,  Chiko Otani

IPC分类号： G02F2/02

CPC分类号： G02F2/002 ,  G02F1/3534 ,  G02F2203/13

摘要： A first laser beam 1a and a second laser beam 1b are incident on a difference frequency mixing unit, and the two laser beams are overlapped in the difference frequency mixing unit, thereby generating a terahertz wave whose frequency is a frequency difference between the two laser beams. Each laser beam has a spatial spread in a frequency gradient direction, and a spatial frequency distribution of each laser beam is a distribution in which a magnitude of a frequency gradually increases in the frequency gradient direction. Accordingly, a frequency difference between the two laser beams is equal in each position in an overlapping region of the two laser beams. A terahertz wave of a single frequency is generated from this overlapping region. By spatially shifting the first laser beam and the second laser beam with respect to each other in the frequency gradient direction, the frequency difference in the overlapping region is changed, so that the single frequency is changed.

摘要翻译： 第一激光束1a和第二激光束1b入射在差分混频单元上，并且两个激光束在差分混频单元中重叠，从而产生频率为两个激光束之间的频率差的太赫兹波 。 每个激光束在频率梯度方向上具有空间扩展，并且每个激光束的空间频率分布是其频率幅度在频率梯度方向上逐渐增加的分布。 因此，两个激光束之间的频率差在两个激光束的重叠区域中的每个位置相等。 从该重叠区域产生单个频率的太赫兹波。 通过在频率梯度方向上相对于彼此空间移动第一激光束和第二激光束，改变重叠区域中的频率差，从而改变单个频率。

公开(公告)号：US20110037001A1

公开(公告)日：2011-02-17

申请号：US12989368

申请日：2009-04-21

申请人： Ken-ichiro Maki ,  Takayuki Shibuya ,  Chiko Otani ,  Kodo Kawase

发明人： Ken-ichiro Maki ,  Takayuki Shibuya ,  Chiko Otani ,  Kodo Kawase

IPC分类号： G02B26/10 ,  G02F1/35 ,  G02F1/29

CPC分类号： H01Q3/42 ,  G02F2203/13 ,  H01Q19/06 ,  H01Q19/062

摘要： To provide a terahertz beam scanning apparatus and method that can scan a terahertz beam at high speed over a wide angle. The terahertz beam scanning apparatus includes: a laser device 12 that generates a first laser beam 1 and a second laser beam 2 having different wavelengths; a laser optical system 14 that focuses the first laser beam 1 and the second laser beam 2 on a same common focal point 14b; and a terahertz generator 16 that is located at the common focal point and generates a terahertz beam 4 by difference frequency mixing. The laser optical system 14 is configured to be capable of changing a relative incidence θi between the first laser beam and the second laser beam to the terahertz generator.

摘要翻译： 提供一种太赫兹波束扫描装置和方法，可以在广角上高速扫描太赫波束。 太赫兹光束扫描装置包括：激光装置12，其产生具有不同波长的第一激光束1和第二激光束2; 将第一激光束1和第二激光束2聚焦在同一公共焦点14b上的激光光学系统14; 以及位于公共焦点处的太赫兹发生器16，通过差频混频产生太赫兹波束4。 激光光学系统14被配置为能够将第一激光束和第二激光束之间的相对入射角与i之间的距离改变为太赫兹发生器。

公开(公告)号：US08369002B2

公开(公告)日：2013-02-05

申请号：US12989382

申请日：2009-04-21

申请人： Ken-ichiro Maki ,  Chiko Otani

发明人： Ken-ichiro Maki ,  Chiko Otani

IPC分类号： G02F2/02 ,  H01S3/10

CPC分类号： G02F2/002 ,  G02F1/3534 ,  G02F2203/13

摘要： First and second laser beams are incident on a difference frequency mixing unit, and the two laser beams overlap in the difference frequency mixing unit, thereby generating a terahertz wave whose frequency is a frequency difference between the two laser beams. Each laser beam has a spatial spread in a frequency gradient direction, and a spatial frequency distribution of each laser beam is a distribution in which a magnitude of a frequency gradually increases in the frequency gradient direction. A frequency difference between the two laser beams is equal in each position in an overlapping region of the two laser beams. A terahertz wave of a single frequency is generated from this overlapping region. By spatially shifting the first laser beam and the second laser beam with respect to each other in the frequency gradient direction, the frequency difference in the overlapping region is changed, which changes the single frequency.

摘要翻译： 第一和第二激光束入射在差分混频单元上，并且两个激光束在差分混频单元中重叠，从而产生频率为两个激光束之间的频率差的太赫兹波。 每个激光束在频率梯度方向上具有空间扩展，并且每个激光束的空间频率分布是其频率幅度在频率梯度方向上逐渐增加的分布。 在两个激光束的重叠区域中，两个激光束之间的频率差在每个位置相等。 从该重叠区域产生单个频率的太赫兹波。 通过在频率梯度方向上相对于彼此空间移动第一激光束和第二激光束，改变重叠区域中的频率差，从而改变单个频率。

公开(公告)号：US08121157B2

公开(公告)日：2012-02-21

申请号：US12989368

申请日：2009-04-21

申请人： Ken-ichiro Maki ,  Takayuki Shibuya ,  Chiko Otani ,  Kodo Kawase

发明人： Ken-ichiro Maki ,  Takayuki Shibuya ,  Chiko Otani ,  Kodo Kawase

IPC分类号： H01S3/10

CPC分类号： H01Q3/42 ,  G02F2203/13 ,  H01Q19/06 ,  H01Q19/062

摘要： To provide a terahertz beam scanning apparatus and method that can scan a terahertz beam at high speed over a wide angle. The terahertz beam scanning apparatus includes: a laser device 12 that generates a first laser beam 1 and a second laser beam 2 having different wavelengths; a laser optical system 14 that focuses the first laser beam 1 and the second laser beam 2 on a same common focal point 14b; and a terahertz generator 16 that is located at the common focal point and generates a terahertz beam 4 by difference frequency mixing. The laser optical system 14 is configured to be capable of changing a relative incidence θi between the first laser beam and the second laser beam to the terahertz generator.

摘要翻译： 提供一种太赫兹波束扫描装置和方法，可以在广角上高速扫描太赫波束。 太赫兹光束扫描装置包括：激光装置12，其产生具有不同波长的第一激光束1和第二激光束2; 将第一激光束1和第二激光束2聚焦在同一公共焦点14b上的激光光学系统14; 以及位于公共焦点处的太赫兹发生器16，通过差频混频产生太赫兹波束4。 激光光学系统14被配置为能够将第一激光束和第二激光束之间的相对入射角与i之间的距离改变为太赫兹发生器。