公开(公告)号：US6081539A

公开(公告)日：2000-06-27

申请号：US281711

申请日：1999-03-30

申请人： Shigenori Mattori ,  Shigeru Kinugawa ,  Takanori Saitoh

发明人： Shigenori Mattori ,  Shigeru Kinugawa ,  Takanori Saitoh

IPC分类号： H04B10/516 ,  H01S5/00 ,  H01S5/042 ,  H01S5/065 ,  H01S5/14 ,  H04B10/07 ,  H04B10/564 ,  H04B10/572 ,  H04B10/61 ,  H01S3/10

CPC分类号： H01S5/141 ,  H01S5/143

摘要： A tunable laser source apparatus includes an external cavity. The external cavity includes a semiconductor laser and a diffraction section. At least one laser output end facet of the semiconductor laser is covered with an AR coating. The diffraction section includes a first reflector and a diffraction grating, and has wavelength selectivity with which light emerging from the end facet of the semiconductor laser which is covered with the AR coating is received, and light having a predetermined wavelength is selected and reflected toward the semiconductor laser. The semiconductor laser further includes an angle detection section and a control section. The angle detection section detects the angle defined by the optical path of the light emerging from the semiconductor laser and the optical path of the diffracted light reflected by the diffraction section. The control section controls at least the cavity length of the external cavity or the selected wavelength of the diffraction section to set the angle detected by the angle detection section to zero.

摘要翻译： 可调谐激光源装置包括外部空腔。 外部空腔包括半导体激光器和衍射部分。 半导体激光器的至少一个激光输出端面被AR涂层覆盖。 衍射部分包括第一反射器和衍射光栅，并且具有波长选择性，从AR接收覆盖半导体激光器的端面的出射光，从而选择具有预定波长的光并反射到 半导体激光器。 半导体激光器还包括角度检测部分和控制部分。 角度检测部分检测由半导体激光器出射的光的光路和由衍射部分反射的衍射光的光路所限定的角度。 控制部分至少控制外腔的腔长度或衍射部分的选定波长，以将由角度检测部检测到的角度设置为零。

公开(公告)号：US6141360A

公开(公告)日：2000-10-31

申请号：US701027

申请日：1996-08-21

申请人： Shigeru Kinugawa ,  Shigenori Mattori

发明人： Shigeru Kinugawa ,  Shigenori Mattori

IPC分类号： H01S3/082 ,  H01S3/1055 ,  H01S5/00 ,  H01S5/065 ,  H01S5/10 ,  H01S5/14 ,  H01S3/10

CPC分类号： H01S3/0826 ,  H01S5/141 ,  H01S5/1021

摘要： A laser light source apparatus includes a compound cavity and an optical gain medium. The compound cavity includes first, second, and third optical reflection members disposed along the optical axis. The first optical reflection member has a light wavelength selectivity. At least one of the first to third optical reflection members can change its own position on an optical axis in relation to the other reflection members. Two of the first to third optical reflection members are provided opposite to each other with the optical gain medium inserted therebetween, thereby forming a laser light source. The other one optical reflection member is provided so as to form a light path for feeding laser light emitted from the laser light source back to the laser light source.

摘要翻译： 激光光源装置包括复合腔和光学增益介质。 复合腔包括沿着光轴设置的第一，第二和第三光学反射部件。 第一光学反射构件具有光波长选择性。 第一至第三光学反射构件中的至少一个可以相对于其它反射构件在光轴上改变其自身位置。 第一至第三光学反射部件中的两个彼此相对设置，其中插入光学增益介质，从而形成激光光源。 设置另一个光学反射构件以形成用于将从激光光源发射的激光反射回激光光源的光路。

公开(公告)号：US06891616B2

公开(公告)日：2005-05-10

申请号：US10397797

申请日：2003-03-26

申请人： Takanori Saitoh ,  Shigeru Kinugawa

发明人： Takanori Saitoh ,  Shigeru Kinugawa

IPC分类号： G01J4/04 ,  G01J4/00 ,  G01N4/00

CPC分类号： G01J4/00

摘要： Faraday rotators each have a Faraday element which rotates light and a magnetic field generator for applying a magnetic field to the Faraday element. A wavelength plate is disposed between the Faraday rotators and it retards the light. A polarizer transmits, of the light, light having a predetermined plane of polarization which has been rotated by the Faraday rotators and retarded by the wavelength plate. An optical receiver receives the light transmitted by the polarizer and outputs a light receiving signal which corresponds to the amount of light received. A signal generator outputs a control signal for polarizing the light to be measured into at least four polarization states to the magnetic field generator. A signal processor determines Stokes parameters which indicate the polarization state of the light to be measured based on the four polarization states, and the light receiving signal corresponding to each of the four polarization states.

摘要翻译： 法拉第旋转器各自具有旋转光的法拉第元件和用于向法拉第元件施加磁场的磁场发生器。 波长板布置在法拉第旋转器之间，并延迟光。 偏振器透射具有由法拉第旋转器旋转并被波长板延迟的具有预定偏振面的光。 光接收器接收由偏振器发射的光，并输出与所接收的光量对应的光接收信号。 信号发生器输出用于使待测光被偏振至至少四个极化状态的控制信号给磁场发生器。 信号处理器基于四个偏振态确定表示待测光的偏振状态的斯托克斯参数，以及对应于四个极化状态中的每一个的光接收信号。

公开(公告)号：US06792215B1

公开(公告)日：2004-09-14

申请号：US09856518

申请日：2001-05-21

申请人： Isao Kobayashi ,  Koji Kawakita ,  Hiroshi Furukawa ,  Shigeru Kinugawa

发明人： Isao Kobayashi ,  Koji Kawakita ,  Hiroshi Furukawa ,  Shigeru Kinugawa

IPC分类号： H04J1400

CPC分类号： H04J14/02 ,  H04B10/506 ,  H04B10/572

摘要： A multi-wavelength light source apparatus includes a tunable light source, optical intensity modulator, optical coupler, annular optical delay circuit, and optical gate device. The tunable light source successively changes and outputs a plurality of output lights different in wavelength from one another. The optical intensity modulator outputs a modulated signal light obtained by modulating an amplitude of the output light outputted from the tunable light source over a predetermined time. The optical coupler is optically connected to the optical intensity modulator, and receives the light outputted from the optical intensity modulator. The annular optical delay circuit is optically connected to the optical coupler, and delays a part of the output light outputted from the optical intensity modulator over a time longer than the predetermined time. The optical gate device is optically connected to the optical coupler, receives the output light outputted from the optical intensity modulator and the light passed via the annular optical delay circuit to open a gate at a timing and time width such that all of the signal light modulated over the predetermined time is included one by one for each of the plurality of wavelengths.

摘要翻译： 多波长光源装置包括可调谐光源，光强度调制器，光耦合器，环形光延迟电路和光栅装置。 可调谐光源连续地改变并输出波长不同的多个输出光。 光强度调制器通过在预定时间内调制从可调谐光源输出的输出光的振幅而获得的调制信号光。 光耦合器光学连接到光强度调制器，并且接收从光强度调制器输出的光。 环形光延迟电路光连接到光耦合器，并且在比预定时间长的时间内延迟从光强度调制器输出的一部分输出光。 光栅装置光学连接到光耦合器，接收从光强度调制器输出的输出光和经由环形光延迟电路通过的光以定时和时间宽度打开一个栅极，使得所有信号光调制 在多个波长中的每个波长上一个接一个地包含预定时间。