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    OPTICAL FIBER LASERS
    2.
    发明申请
    OPTICAL FIBER LASERS 审中-公开
    光纤激光器

    公开(公告)号：WO2012101391A1

    公开(公告)日：2012-08-02

    申请号：PCT/GB2011/000742

    申请日：2011-05-13

    Applicant: UNIVERSITY OF SOUTHAMPTON ,  CLARKSON, William, Andrew ,  CIESLAK, Rafal

    Inventor： CLARKSON, William, Andrew ,  CIESLAK, Rafal

    IPC: H01S3/067 ,  H01S3/07 ,  H01S3/082 ,  H01S3/108 ,  H01S3/109 ,  H01S3/06 ,  H01S3/094 ,  H01S3/08

    CPC classification number: H01S3/08 ,  G02F2001/3542 ,  H01S3/0604 ,  H01S3/067 ,  H01S3/0675 ,  H01S3/06791 ,  H01S3/07 ,  H01S3/08022 ,  H01S3/0826 ,  H01S3/094042 ,  H01S3/094084 ,  H01S3/1083 ,  H01S3/1086 ,  H01S3/109

    Abstract: A fiber gain medium provided by a rare-earth doped fiber (10) is contained in a first resonant cavity by end reflectors (12, 18). The reflector (12) is wavelength selective to limit the frequency band of the first resonant cavity. The first resonant cavity also contains a second resonant enhancement cavity (16) with multiple transmission bands lying within the first resonant cavity's frequency band. Multiple standing wave modes of the first resonant cavity lie within both the frequency band of the first resonant cavity and the transmission bands of the second resonant cavity, and it is these standing wave modes that support laser action when the rare-earth doped fiber is suitably pumped by pump lasers (40).

    Abstract translation: 由稀土掺杂光纤（10）提供的光纤增益介质通过端反射器（12,18）包含在第一谐振腔中。 反射器（12）是波长选择性的，以限制第一谐振腔的频带。 第一谐振腔还包括具有位于第一谐振腔的频带内的多个透射带的第二谐振增强腔（16）。 第一谐振腔的多个驻波模式位于第一谐振腔的频带和第二谐振腔的传输带之间，并且当稀土掺杂的光纤适当时，支持激光作用的这些驻波模式 泵浦激光器泵送（40）。

    BEAM TRANSFORMER
    5.
    发明申请
    BEAM TRANSFORMER 审中-公开
    光束变压器

    公开(公告)号：WO2007107684A1

    公开(公告)日：2007-09-27

    申请号：PCT/GB2006/001035

    申请日：2006-03-21

    Applicant: UNIVERSITY OF SOUTHAMPTON ,  CLARKSON, William, Andrew ,  MACKENZIE, Jacob, Isa

    Inventor： CLARKSON, William, Andrew ,  MACKENZIE, Jacob, Isa

    IPC: G02B27/09 ,  H01S3/00

    CPC classification number: G02B27/0983 ,  G02B19/0028 ,  G02B19/0052 ,  H01S3/005

    Abstract: A beam transformer (30) changes the aspect ratio of the transverse spatial intensity profile I(x,y) of a light beam, the beam transformer comprising first and second rotationally symmetrical curved reflecting surfaces (14, 18) so arranged that the beam is reflected from the first curved surface (14) and subsequently by the second curved surface (18), the first reflecting surface (14) being tilted, with respect to the local propagation direction z of the beam (12), substantially about the local transverse x axis of the beam, and the second reflecting surface (18) being tilted, with respect to the local propagation direction z of the beam (16), substantially about the orthogonal local transverse y axis of the beam (16). The beam transformer can be used to change a laser beam from one with a highly asymmetric transverse intensity distribution (eg a highly elliptical beam profile (10; 60)) into one with a substantially axially-symmetric transverse intensity distribution (eg a circular beam profile (22)) or vice versa. One important example of such an application is a solid-state laser or semiconductor laser with a highly asymmetric gain medium. The beam transformer may be used within a laser resonator or external to the laser.

    Abstract translation: 光束变换器（30）改变光束的横向空间强度分布I（x，y）的纵横比，所述光束变换器包括第一和第二旋转对称的弯曲反射表面（14,18），以使得光束 从第一弯曲表面（14）反射并随后由第二弯曲表面（18）反射，第一反射表面（14）相对于梁（12）的局部传播方向z倾斜，基本上围绕局部横向 x轴，并且第二反射表面（18）相对于梁（16）的局部传播方向z基本上围绕梁（16）的正交局部横向y轴倾斜。 光束变换器可用于将激光束从具有高度不对称的横向强度分布（例如，高度椭圆形的光束轮廓（10; 60））的激光束改变为具有基本轴向对称的横向强度分布（例如圆形光束轮廓 （22）），反之亦然。 这种应用的一个重要实例是具有高度非对称增益介质的固态激光器或半导体激光器。 光束变换器可以在激光谐振器内或在激光器的外部使用。

    OPTICAL FIBRE WITH ANGLED CORE
    6.
    发明申请
    OPTICAL FIBRE WITH ANGLED CORE 审中-公开
    带光学核的光纤

    公开(公告)号：WO2007077419A1

    公开(公告)日：2007-07-12

    申请号：PCT/GB2006/004851

    申请日：2006-12-21

    Applicant: UNIVERSITY OF SOUTHAMPTON ,  CLARKSON, William, Andrew ,  WANG, Pu

    Inventor： CLARKSON, William, Andrew ,  WANG, Pu

    IPC: G02B6/02

    CPC classification number: G02B6/02 ,  G02B6/2552 ,  G02B6/262 ,  G02B6/4207 ,  H01S3/0064 ,  H01S3/06708

    Abstract: An optical fibre is heated and twisted so that the resulting optical fibre has a core that inclines at an angle with the longitudinal axis. The angled core (12) may be located at an end-facet (18) of the optical fibre and used to control the feedback of light reflected from that end-facet. In this way, the angled core may be used to suppress feedback for applications such as superluminescent sources or fibre amplifiers, or may be used to control the feedback for applications such as optical fibre lasers. Alternatively, the angled core may be used to attenuate certain modes propagating within the core.

    Abstract translation: 加热和扭曲光纤，使得所得到的光纤具有与纵向轴线成一角度倾斜的芯部。 成角度的芯（12）可以位于光纤的端面（18）处，并用于控制从该端面反射的光的反馈。 以这种方式，成角度的芯可用于抑制诸如超发光源或光纤放大器之类的应用的反馈，或者可用于控制诸如光纤激光器之类的应用的反馈。 或者，成角度的芯可以用于衰减在芯内传播的某些模式。

    ACOUSTO-OPTIC DEVICE
    7.
    发明申请
    ACOUSTO-OPTIC DEVICE 审中-公开

    公开(公告)号：WO1994021012A1

    公开(公告)日：1994-09-15

    申请号：PCT/GB1994000371

    申请日：1994-02-24

    Applicant: UNIVERSITY OF SOUTHAMPTON ,  HANNA, David, Colin ,  CLARKSON, William, Andrew

    Inventor： UNIVERSITY OF SOUTHAMPTON

    IPC: H01S03/083

    CPC classification number: H01S3/083 ,  H01S3/0602 ,  H01S3/0606 ,  H01S3/1068

    Abstract: An acousto-optic modulator in a ring laser consists of a transducer (10) bonded to a deflection medium (11). The deflection medium is a laser-acted medium which, in use, acts as the gain medium of the laser. Acoustic waves are induced in the deflection medium (11) to effect deflection of light transmitted therethrough. The modulator can, thus, be formed in unitary fashion with the gain medium of the ring laser producing a robust and stable device.

    Abstract translation: 环形激光器中的声光调制器由结合到偏转介质（11）的换能器（10）组成。 偏转介质是激光作用介质，其在使用中用作激光的增益介质。 在偏转介质（11）中感应出声波以实现透过其的光的偏转。 因此，调制器可以以环形激光器的增益介质以单一方式形成，从而产生鲁棒且稳定的装置。

    LASER WITH A TAILORED AXIALLY SYMMETRIC PUMP BEAM PROFILE BY MODE CONVERSION A WAVEGUIDE
    8.
    发明申请
    LASER WITH A TAILORED AXIALLY SYMMETRIC PUMP BEAM PROFILE BY MODE CONVERSION A WAVEGUIDE 审中-公开
    具有定制的轴对称泵浦波形的激光通过模式转换波形

    公开(公告)号：WO2012146912A1

    公开(公告)日：2012-11-01

    申请号：PCT/GB2012/050868

    申请日：2012-04-20

    Applicant: UNIVERSITY OF SOUTHAMPTON ,  CLARKSON, William Andrew ,  KIM, Ji Won ,  MACKENZIE, Jacob Isa

    Inventor： CLARKSON, William Andrew ,  KIM, Ji Won ,  MACKENZIE, Jacob Isa

    IPC: H01S3/00 ,  H01S3/094 ,  H01S3/102 ,  H01S3/06 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/08

    CPC classification number: H01S3/063 ,  G02B6/02361 ,  G02B6/03611 ,  G02B6/03666 ,  G02B27/0927 ,  G02B27/0994 ,  H01S3/005 ,  H01S3/0604 ,  H01S3/061 ,  H01S3/094038 ,  H01S3/094042 ,  H01S3/09408 ,  H01S3/09415 ,  H01S3/1022 ,  H01S3/117 ,  H01S3/1608 ,  H01S3/1643 ,  H01S2301/203 ,  H01S2301/206

    Abstract: A laser device comprising a pump source (10) operable to generate a pump beam (11) for a resonant cavity in which a laser medium (74) is arranged. A beam- shaping waveguide element (18) is arranged between the purnp source and the resonant cavity. Shaping of the pump beam is achieved by tailoring the refractive index profile of the waveguide element (18) so that it yields an intensity distribution which spatially overlaps a desired ring-shaped Laguerre - Gaussian mode of the resonant cavity sufficiently well to achieve laser oscillation on said desired Laguerre - Gaussian mode. A ring-shaped or doughnut - shaped laser beam profile can thus be generated. It is further possible to design the refractive index profile (76) so that the pump beam's intensity distribution also spatially overlaps the fundamental mode of the resonant cavity sufficiently well to achieve laser oscillation also on said fundamental mode. The laser will then lase on both the fundamental mode and the selected Laguerre - Gaussian mode. This is useful for producing a variety of beam profiles based on mixing a Gaussian profile with a ring-shaped profile. A top-hat beam profile can be achieved by such mixing.

    Abstract translation: 一种激光装置，包括泵浦源（10），其可操作以产生其中布置有激光介质（74）的谐振腔的泵浦光束（11）。 波导形成波导元件（18）布置在urnp源和谐振腔之间。 通过调整波导元件（18）的折射率分布来实现泵浦光束的成形，使得其产生与谐振腔的期望的环形拉格尔 - 高斯模式空间重叠的强度分布，以实现激光振荡 表示所需的Laguerre - 高斯模式。 因此可以产生环形或环形激光束轮廓。 还可以设计折射率分布（76），使得泵浦光束的强度分布也在空间上与谐振腔的基本模式充分良好地重叠以在所述基本模式上实现激光振荡。 然后，激光器将在基本模式和所选的拉格尔 - 高斯模式两者之间发光。 这对于生产基于将高斯分布与环形轮廓混合的各种光束轮廓是有用的。 可以通过这种混合来实现顶帽光束轮廓。

    RING LASER
    9.
    发明申请
    RING LASER 审中-公开
    环形激光

    公开(公告)号：WO1990012435A1

    公开(公告)日：1990-10-18

    申请号：PCT/GB1990000551

    申请日：1990-04-11

    Applicant: THE SECRETARY OF STATE FOR DEFENCE IN HER ... ,  HANNA, David, Colin ,  CLARKSON, William, Andrew

    Inventor： THE SECRETARY OF STATE FOR DEFENCE IN HER ...

    IPC: H01S03/083

    CPC classification number: H01S3/083

    Abstract: A ring laser (10) incorporates a laser rod (R) with end faces (R1, R2). The first face (R1) is coated for high reflectivity at the laser wavelength and the second (R2) for high transmission at this wavelength. The first face (R1) provides one cavity end mirror, and a concave mirror (M1) spaced apart from the rod (R) provides the other. A rhombic prism (P) between the rod (R) and mirror (M1) defines differing (figure of eight) forward and return paths (14 to 17, 18 to 21) for cavity radiation passing from one end mirror (R1 or M1) to the other and returning. The prism (P) presents Brewster's angle refracting surfaces. The second rod face (R2) is tilted to produce an optical path in two planes. A magnetic field (B) along the rod axis (Ra) produces Faraday rotation of polarization. This counteracts rotation arising from non-coplanar optics for one direction of propagation around the laser cavity (10) but not the other. This produces unidirectional laser action.

    Abstract translation: 环形激光器（10）包括具有端面（R1，R2）的激光棒（R）。 在激光波长处涂覆第一面（R1）以获得高反射率，在该波长处涂覆第二面（R2）用于高透射率。 第一面（R1）提供一个腔端镜，并且与杆（R）间隔开的凹面镜（M1）提供另一个。 杆（R）和反射镜（M1）之间的菱形棱镜（P）限定了从一个端面镜（R1或M1）通过的腔体辐射的不同（八分之一）向前和返回路径（14至17,18至21） 到另一个并返回。 棱镜（P）呈现布鲁斯特角度折射面。 第二杆面（R2）倾斜以在两个平面中产生光路。 沿着杆轴（Ra）的磁场（B）产生极化的法拉第旋转。 这抵消了由非共面光学器件产生的旋转，其围绕激光腔（10）传播一个传播方向，而不是另一个。 这产生单向激光作用。

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