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1. 发明授权

US5555254A High brightness solid-state laser with zig-zag amplifier 失效
标题翻译：具有锯齿形放大器的高亮度固态激光器
公开(公告)号：US5555254A
公开(公告)日：1996-09-10
申请号：US148758
申请日：1993-11-05
申请人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
发明人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
IPC分类号： G02F1/35 , H01S3/04 , H01S3/042 , H01S3/06 , H01S3/08 , H01S3/0941 , H01S3/10 , H01S3/109 , H01S3/23
CPC分类号： H01S3/2316 , H01S3/042 , H01S3/0606 , H01S3/0941 , H01S3/0407 , H01S3/0621 , H01S3/0625 , H01S3/08072 , H01S3/08095 , H01S3/10076 , H01S3/109
摘要： A solid-state laser architecture producing a beam of extremely high quality and brightness, including a master oscillator operating in conjunction with a zig-zag amplifier, an image relaying telescope and a phase conjugation cell. One embodiment of the laser architecture compensates for birefringence that is thermally induced in the amplifier, but injects linearly polarized light into the phase conjugation cell. Another embodiment injects circularly polarized light into the phase conjugation cell and includes optical components that eliminate birefringence effects arising in a first pass through the amplifier. Optional features permit the use of a frequency doubler assembly to provide output at twice optical frequencies, and an electro-optical switch or Faraday rotator to effect polarization angle rotation if the amplifier material can only be operated at one polarization. The zig-zag amplifier is cooled by flow of cooling liquid, preferably using longitudinal flow to minimize temperature gradients in a vertical direction, and has cooling channel seals disposed in dead zones that receive no light, to minimize optical damage to the seals. Light is input to the amplifier at a near normal angle of incidence, to minimize polarization by reflection and to permit a polarizer to be used to extract an output beam from the amplifier. Antireflective coatings on edges and on sides of the amplifier eliminate parasitic oscillations, and wedge-shaped windows provide uniform pumping by eliminating gaps between diode arrays.
摘要翻译：一种固态激光器架构，产生了极高质量和亮度的光束，包括与之前的Zig放大器，图像中继望远镜和相位共轭单元结合操作的主振荡器。激光器结构的一个实施例补偿了在放大器中热感应的双折射，但是将线偏振光注入到相位共轭单元中。另一实施例将圆偏振光注入到相位共轭单元中，并且包括消除在第一次通过放大器中产生的双折射效应的光学部件。可选功能允许使用倍频器组件提供两倍光频率的输出，以及如果放大器材料只能在一个极化下操作，则电光开关或法拉第旋转器可实现偏振角旋转。锯齿形放大器通过冷却液体的流动来冷却，优选地使用纵向流动以使垂直方向上的温度梯度最小化，并且具有设置在不受光的死区中的冷却通道密封件，以最小化对密封件的光学损伤。光以接近的正常入射角输入到放大器，以通过反射使偏振最小化，并允许使用偏振器从放大器提取输出光束。在放大器的边缘和侧面上的抗反射涂层消除了寄生振荡，楔形窗口通过消除二极管阵列之间的间隙来提供均匀的泵浦。

2. 发明授权

US5646773A Solid-state zig-zag slab optical amplifier 失效
标题翻译：固态曲折平板光学放大器
公开(公告)号：US5646773A
公开(公告)日：1997-07-08
申请号：US541540
申请日：1995-10-10
申请人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
发明人： Hagop Injeyan , Randall J. St. Pierre , Rodger C. Hilyard , George M. Harpole , Carolyn S. Hoefer
IPC分类号： G02F1/35 , H01S3/04 , H01S3/042 , H01S3/06 , H01S3/08 , H01S3/0941 , H01S3/10 , H01S3/109 , H01S3/23 , H01S3/09
CPC分类号： H01S3/2316 , H01S3/042 , H01S3/0606 , H01S3/0941 , H01S3/0407 , H01S3/0621 , H01S3/0625 , H01S3/08072 , H01S3/08095 , H01S3/10076 , H01S3/109
摘要： A solid-state laser architecture producing a beam of extremely high quality and brightness, including a master oscillator operating in conjunction with a zig-zag amplifier, an image relaying telescope and a phase conjugation cell. One embodiment of the laser architecture compensates for birefringence that is thermally induced in the amplifier, but injects linearly polarized light into the phase conjugation cell. Another embodiment injects circularly polarized light into the phase conjugation cell and includes optical components that eliminate birefringence effects arising in a first pass through the amplifier. Optional features permit the use of a frequency doubler assembly to provide output at twice optical frequencies, and an electro-optical switch or Faraday rotator to effect polarization angle rotation if the amplifier material can only be operated at one polarization. The zig-zag amplifier is cooled by flow of cooling liquid, preferably using longitudinal flow to minimize temperature gradients in a vertical direction, and has cooling channel seals disposed in dead zones that receive no light, to minimize optical damage to the seals. Light is input to the amplifier at a near normal angle of incidence, to minimize polarization by reflection and to permit a polarizer to be used to extract an output beam from the amplifier. Antireflective coatings on edges and on sides of the amplifier eliminate parasitic oscillations, and wedge-shaped windows provide uniform pumping by eliminating gaps between diode arrays.
摘要翻译：一种固态激光器架构，产生了极高质量和亮度的光束，包括与之前的Zig放大器，图像中继望远镜和相位共轭单元结合操作的主振荡器。激光器结构的一个实施例补偿了在放大器中热感应的双折射，但是将线偏振光注入到相位共轭单元中。另一实施例将圆偏振光注入到相位共轭单元中，并且包括消除在第一次通过放大器中产生的双折射效应的光学部件。可选功能允许使用倍频器组件提供两倍光频率的输出，以及如果放大器材料只能在一个极化下操作，则电光开关或法拉第旋转器可实现偏振角旋转。锯齿形放大器通过冷却液体的流动来冷却，优选地使用纵向流动以使垂直方向上的温度梯度最小化，并且具有设置在不受光照射的死区中的冷却通道密封件，以最小化对密封件的光学损伤。光以接近的正常入射角输入到放大器，以通过反射使偏振最小化，并允许使用偏振器从放大器提取输出光束。在放大器的边缘和侧面上的抗反射涂层消除了寄生振荡，楔形窗口通过消除二极管阵列之间的间隙来提供均匀的泵浦。

3. 发明授权

US06268956B1 End pumped zig-zag slab laser gain medium 有权
标题翻译：末端抽取锯齿状平板激光增益介质
公开(公告)号：US06268956B1
公开(公告)日：2001-07-31
申请号：US09580726
申请日：2000-05-30
申请人： Hagop Injeyan , Carolyn S. Hoefer , Stephen P. Palese
发明人： Hagop Injeyan , Carolyn S. Hoefer , Stephen P. Palese
IPC分类号： H01S300
CPC分类号： H01S3/0602 , H01S3/042 , H01S3/0606 , H01S3/0612 , H01S3/0615 , H01S3/0623 , H01S3/0625 , H01S3/063 , H01S3/08095 , H01S3/094053 , H01S3/094057 , H01S3/09408 , H01S3/0941 , H01S3/09415 , H01S3/11 , H01S3/1603 , H01S3/1643 , H01S3/2308 , H01S3/2383
摘要： An optical amplifier (20, 100) includes an elongated slab (22, 102) of solid state lapsing material, such as a rare earth doped yttrium-aluminum-garnet (YAG) slab. In order to provide a relatively increased absorption length and thus a higher overall efficiency, the optical amplifier (20, 100) in accordance with the present invention incorporates end pumping in which the pumped light is coaligned with the amplified light resulting in relatively longer absorption lengths and higher overall efficiencies. The coaligned pumped sources are directed to lateral faces of the slab (22, 102) which include footprints (41, 43, 108) or windows. In order to cause internal reflection of the pump beam along the lapsing axis, the end faces (28, 30, 110) are formed at about a 45° angle relative to the longitudinal axis which causes the pumped light to be reflected within the slab co-axially with amplified light. In order to confine the absorption of the pumped light to the center portion of the slab (22, 102), the slab (22, 102) may be formed from a composite material with the opposing end portions of the slab formed from an undoped host material while the center portion of the slab along the longitudinal axis is formed from a doped host material. Such a configuration provides relatively low residual thermal lensing with virtually no birefringence. In one embodiment, the pumping light from the diode arrays is coupled to the slab (22, 102) by way of lenses (54) or lens ducts (FIG. 1). In an alternate embodiment, the pumping light is coupled to the slab (22, 102) by way of optical fibers (104, 106). In yet another embodiment (FIG. 8), the pumping light and laser beams are interchanged forming a low-loss straight through slab with end pumped architecture.
摘要翻译：光学放大器（20,100）包括固态收缩材料的细长板（22,102），例如稀土掺杂的钇 - 铝 - 石榴石（YAG）板。为了提供相对增加的吸收长度并因此提供更高的总体效率，根据本发明的光放大器（20,100）包括端泵浦，其中泵浦的光与放大的光轴相结合，导致相对更长的吸收长度并提高整体效率。联合泵送源被引导到板坯（22,102）的侧面，其包括脚印（41,43,108）或窗口。为了引起泵浦光束沿着折叠轴的内部反射，端面（28,30,110）相对于纵向轴线以大约45°的角度形成，这导致泵送的光在板坯co 用放大的光轴。为了将抽吸光的吸收限制在板坯（22,102）的中心部分，板坯（22,102）可以由复合材料形成，其中板坯的相对端部由未掺杂的主体而沿着纵向轴线的板坯的中心部分由掺杂的主体材料形成。这种构造提供了相对较低的剩余热透镜，实际上没有双折射。在一个实施例中，来自二极管阵列的泵浦光通过透镜（54）或透镜导管（图1）耦合到板坯（22,102）。在替代实施例中，泵浦光通过光纤（104,106）耦合到板坯（22,102）。在另一个实施例（图8）中，泵浦光和激光束互换形成具有末端泵浦结构的低损耗直通板。

4. 发明授权

US06256142B1 End pumped zig-zag slab laser gain medium 有权
标题翻译：末端抽取锯齿状平板激光增益介质
公开(公告)号：US06256142B1
公开(公告)日：2001-07-03
申请号：US09584011
申请日：2000-05-30
申请人： Hagop Injeyan , Carolyn S. Hoefer
发明人： Hagop Injeyan , Carolyn S. Hoefer
IPC分类号： H01S300
CPC分类号： H01S3/09415 , H01S3/0606 , H01S3/0625 , H01S3/08095 , H01S3/09408 , H01S3/11 , H01S3/1603 , H01S3/1643 , H01S3/2308
摘要： An optical amplifier which includes an elongated slab of solid state lasing material, such as a rare earth doped yttrium-aluminum-garnet (YAG). In order to provide a relatively increased absorption length and thus a higher overall efficiency, the optical amplifier in accordance with the present invention incorporates end pumping in which the pumped light is coaligned with the amplified light resulting in relatively longer absorption lengths and higher overall efficiencies. The coaligned pumped sources are directed to lateral faces of the slab which include windows, formed from an insulating coating such as an anti-reflection coating, at the pump wavelength. In order to cause internal reflection of the pump beam along the lasing axis, the end faces are formed at about a 45° angle relative to the longitudinal axis which causes the pumped light to be reflected within the slab co-axially a with a amplified light. In order to confine the absorption of the pumped light to the center portion of the slab, the opposing end portions of the slab may be undoped while the center portion of the slab along the longitudinal axis is doped. Such a configuration provides relatively low residual thermal lensing with virtually no birefringence.
摘要翻译：一种光放大器，其包括细长的固态激光材料板，例如稀土掺杂的钇 - 铝 - 石榴石（YAG）。为了提供相对增加的吸收长度并因此提供更高的总体效率，根据本发明的光放大器结合了端泵浦，其中泵浦光与放大的光轴相结合，导致相对更长的吸收长度和更高的总体效率。联合的泵浦源被引导到板的横向面，其包括由诸如防反射涂层的绝缘涂层形成的窗口，在泵浦波长处。为了引起泵浦光束沿着激光轴的内部反射，端面相对于纵向轴线以大约45度的角度形成，这使得泵浦的光在板内与放大的光同轴地反射。为了将抽吸光的吸收限制在板坯的中心部分，板坯的相对的端部可以是未掺杂的，而沿着纵向轴线的板坯的中心部分被掺杂。这种构造提供了相对较低的剩余热透镜，实际上没有双折射。

5. 发明授权

US6094297A End pumped zig-zag slab laser gain medium 失效
标题翻译：末端抽取锯齿状平板激光增益介质
公开(公告)号：US6094297A
公开(公告)日：2000-07-25
申请号：US111080
申请日：1998-07-07
申请人： Hagop Injeyan , Carolyn S. Hoefer
发明人： Hagop Injeyan , Carolyn S. Hoefer
IPC分类号： H01S3/094 , H01S3/06 , H01S3/063 , H01S3/093 , H01S3/0941 , H01S3/16 , H01S3/23 , H01S3/00 , H01S3/091
CPC分类号： H01S3/09415 , H01S3/0606 , H01S3/0625 , H01S3/08095 , H01S3/09408 , H01S3/11 , H01S3/1603 , H01S3/1643 , H01S3/2308
摘要： An optical amplifier which includes an elongated slab of solid state lasing material, such as a rare earth doped yttrium-aluminum-garnet (YAG). In order to provide a relatively increased absorption length and thus a higher overall efficiency, the optical amplifier in accordance with the present invention incorporates end pumping in which the pumped light is coaligned with the amplified light resulting in relatively longer absorption lengths and higher overall efficiencies. The coaligned pumped sources are directed to lateral faces of the slab which include windows, formed from an insulating coating such as an anti-reflection coating, at the pump wavelength. In order to cause internal reflection of the pump beam along the lasing axis, the end faces are formed at about a 45.degree. angle relative to the longitudinal axis which causes the pumped light to be reflected within the slab co-axially with a amplified light. In order to confine the absorption of the pumped light to the center portion of the slab, the opposing end portions of the slab may be undoped while the center portion of the slab along the longitudinal axis is doped. Such a configuration provides relatively low residual thermal lensing with virtually no birefringence.
摘要翻译：一种光放大器，其包括细长的固态激光材料板，例如稀土掺杂的钇 - 铝 - 石榴石（YAG）。为了提供相对增加的吸收长度并因此提供更高的总体效率，根据本发明的光放大器结合了端泵浦，其中泵浦光与放大的光轴相结合，导致相对更长的吸收长度和更高的总体效率。联合的泵浦源被引导到板的横向面，其包括由诸如防反射涂层的绝缘涂层形成的窗口，在泵浦波长处。为了引起泵浦光束沿着激光轴线的内部反射，端面相对于纵向轴线以大约45度的角度形成，这导致泵浦光在板内与放大的光线同轴地反射。为了将抽吸光的吸收限制在板坯的中心部分，板坯的相对的端部可以是未掺杂的，而沿着纵向轴线的板坯的中心部分被掺杂。这种构造提供了相对较低的剩余热透镜，实际上没有双折射。

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