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1. 发明公开

EP1160940A1 Optical amplifier comprising an end pumped zig-zag slab gain medium 有权
标题翻译：从端面增益介质包括：光学放大器抽油机
公开(公告)号：EP1160940A1
公开(公告)日：2001-12-05
申请号：EP01111282.8
申请日：2001-05-16
申请人： TRW Inc.
发明人： Injeyan, Hagop (NMI) , Hoefer, Carolyn S. , Palese, Stephen P.
IPC分类号： H01S3/06 , H01S3/0941 , H01S3/23
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 lasing 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 lasing 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：光放大器（20，100）包括细长板（22，102）的固态激光材料的板坯，检查作为掺稀土元素钇 - 铝 - 石榴石（YAG）。为了提供一个相对增加吸收长度并且因此更高的总效率，在与本发明雅舞蹈的光放大器（20，100）包括端泵送，其中所述泵浦光被共准直与放大的光在相对较长的吸收长度所得和更高的整体效率。所述共准直泵浦源被引导到板（22，102）包括脚印（41，43，108）或窗口的侧面。为了使沿激射轴泵浦光束的内部反射，端面（28，30，110）相对于所述纵向轴线从而导致泵浦光被板坯共同内反射45°角在FORMED -axially与放大的光。为了限制在泵送光的吸收，板坯（22，102），所述板（22，102）的中心部分可以由复合材料形成有从在未掺杂的主机形成的板坯的相对的端部材料，同时沿纵向轴线板坯的中心部分由掺杂主体材料形成。这样的配置提供具有几乎没有双折射相对低的残余热透镜效应。在一个中，实施例的从二极管阵列泵浦光由透镜（54）或透镜的管道（图1）的方式连接到所述板（22，102）。在一个替代实施例中，泵浦光耦合到所述板（22，102）通过光纤（104，106）的方式。在又一个实施例（图8），将抽运光与激光束被互换直通板坯端形成低损耗泵送体系结构。

2. 发明公开

EP0973236A2 End pumped zig-zag slab laser gain medium 有权
标题翻译： Endgepumpter Laser mit Zick-Zack-Anordnung imVerstärkungsmedium
公开(公告)号：EP0973236A2
公开(公告)日：2000-01-19
申请号：EP99107344.6
申请日：1999-04-21
申请人： TRW Inc.
发明人： Injeyan, Hagop , Hoefer, Carolyn S.
IPC分类号： H01S3/09 , H01S3/16
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 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，其包括细长的固体激光材料板，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表面，其包括在泵浦波长处由诸如防反射涂层的绝缘涂层形成的窗口。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，这使得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。这种配置提供了相对较低的剩余热透镜，实际上没有双折射。

3. 发明公开

EP0652616A1 High brightness solid-state laser with zig-zag amplifier 失效
标题翻译： Festkörperlaserhoher Helligkeit mit Zickzack-Verstärker。
公开(公告)号：EP0652616A1
公开(公告)日：1995-05-10
申请号：EP94114221.8
申请日：1994-09-09
申请人： TRW INC.
发明人： Injeyan, Hagop (NMI) , St. Pierre, Randall J. , Hilyard, Rodger C. , Harpole, George M. , Hoefer, Carolyn S.
IPC分类号： H01S3/23 , H01S3/042 , H01S3/06 , H01S3/094 , H01S3/0941
CPC分类号： H01S3/2316 , H01S3/0407 , H01S3/042 , H01S3/0606 , H01S3/0621 , H01S3/0625 , H01S3/08072 , H01S3/08095 , H01S3/0941 , H01S3/10076 , H01S3/109
摘要： A solid-state laser architecture producing a beam of extremely high quality and brightness, including a master oscillator (10) operating in conjunction with a zig-zag amplifier (16,30), an image relaying telescope (17) and a phase conjugation cell (20). One embodiment of the laser architecture compensates for birefringence that is thermally induced in the amplifier (16), but injects linearly polarized light into the phase conjugation cell (20). Another embodiment (19) injects circularly polarized light into the phase conjugation cell (20) and includes optical components that eliminate birefringence effects arising in a first pass through the amplifier (16,30). Optional features (26) permit the use of a frequency doubler assembly to provide output at twice optical frequencies, and an electro-optical switch or Faraday rotator (71) to effect polarization angle rotation if the amplifier material (16,30) can only be operated at one polarization. The zig-zag amplifier (16,30) is cooled by flow of cooling liquid, preferably using longitudinal flow to minimize temperature gradients in a vertical direction, and has cooling channel seals (50,52) disposed in dead zones that receive no light, to minimize optical damage to the seals (50,52). Light is input to the amplifier (16) at a near normal angle of incidence, to minimize polarization by reflection and to permit a polarizer (14) to be used to extract an output beam from the amplifier (16,30). Antireflective coatings (60) on edges and on sides of the amplifier (16,30) eliminate parasitic oscillations, and wedge-shaped windows (36) provide uniform pumping by eliminating gaps between diode arrays (32).
摘要翻译：一种产生极高质量和亮度的光束的固态激光器结构，包括与之前的Zig放大器（16,30）一起工作的主振荡器（10），图像中继望远镜（17）和相位共轭单元（20）。激光器架构的一个实施例补偿了在放大器（16）中热感应的双折射，但是将线偏振光注入到相位共轭单元（20）中。另一实施例（19）将圆偏振光注入到相位共轭单元（20）中，并且包括消除在第一次通过放大器（16,30）中产生的双折射效应的光学部件。可选功能（26）允许使用倍频器组件以两倍的光学频率提供输出，以及电光开关或法拉第旋转器（71），以便如果放大器材料（16,30）只能是在一极化运行。锯齿形放大器（16,30）由冷却液流动冷却，优选使用纵向流动使垂直方向的温度梯度最小化，并且具有设置在不受光照的死区中的冷却通道密封件（50,52）以最小化对密封件的光学损伤（50,52）。光以几乎普通的入射角输入到放大器（16），以通过反射使偏振最小化，并允许使用偏振器（14）从放大器（16,30）提取输出光束。在放大器（16,30）的边缘和侧面上的抗反射涂层（60）消除寄生振荡，并且楔形窗口（36）通过消除二极管阵列（32）之间的间隙来提供均匀的泵浦。

4. 发明公开

EP0973236A3 End pumped zig-zag slab laser gain medium 有权
标题翻译： Endgepumter激光增益介质之字形排列
公开(公告)号：EP0973236A3
公开(公告)日：2000-04-05
申请号：EP99107344.6
申请日：1999-04-21
申请人： TRW Inc.
发明人： Injeyan, Hagop , Hoefer, Carolyn S.
IPC分类号： H01S3/09 , H01S3/16 , H01S3/06
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 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.

5. 发明授权

EP0652616B1 High brightness solid-state laser with zig-zag amplifier 失效
标题翻译：具有高亮度的Z字形放大器固态激光
公开(公告)号：EP0652616B1
公开(公告)日：1998-11-11
申请号：EP94114221.8
申请日：1994-09-09
申请人： TRW INC.
发明人： Injeyan, Hagop (NMI) , St. Pierre, Randall J. , Hilyard, Rodger C. , Harpole, George M. , Hoefer, Carolyn S.
IPC分类号： H01S3/23 , H01S3/042 , H01S3/06 , H01S3/094 , H01S3/0941
CPC分类号： H01S3/2316 , H01S3/0407 , H01S3/042 , H01S3/0606 , H01S3/0621 , H01S3/0625 , H01S3/08072 , H01S3/08095 , H01S3/0941 , H01S3/10076 , H01S3/109

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